please read and help me
I WILL GIVE BRAINLIEST

Please Read And Help Me I WILL GIVE BRAINLIEST

Answers

Answer 1

To score an A, the score on the third test should be 79.

To lose your B grade, you have to score less than 49 on the third test.

What should be the score on the third test?

The average of a set of numbers is the sum of the numbers divided by the total numbers.

Average = sum of scores / total numbers

90 = (86 + 85 + x) / 3

90 = (191 + x ) / 3

Where x is the score on the third test

In order to determine the value of x, take the following steps:

Multiply both sides of the above equation by 3

90 x 3 = 191 + x

270 = 191 + x

Subtract both sides of the equation by 191

270 - 191 = x

x = 79

The equation that represents the score that would make you lose the B grade is:

80 = (86 + 85 + x) / 3

80 = (191 + x) / 3

In order to determine the value of x, take the following steps:

Multiply both sides of the equation by 3

80 x 3 = (191 + x)

240 = 191 + x

Subtract 191 from both sides of the equation:

x = 240 - 191

x = 49

To lose your B grade, you have to score less than 49 on the third test.

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Related Questions


Simplify each expression using the imaginary unit i . 2 √-24+6 .

Answers

The simplification of the given expression 2 √-24+6 is 9.8 i + 6.

What is a complex number?

Complex numbers are helpful in finding the square root of negative numbers.

A complex number is the sum of a real number and an imaginary number.

Given the expression,

2 √-24+6

Now,

2 √-24+6 = 2√(-1 × 24) + 6

⇒ 2 √(-1) × √24 + 6

Since √(-1) is an imaginary number and is denoted by "i".

So,

2 √(-1) × √24 + 6 = 2i × √24 + 6

⇒ 2√24 i + 6

⇒ √4 × √24 i + 6

⇒ √(4×24) i + 6

⇒ √96 i + 6

⇒ 9.8 i + 6

Hence "The simplification of the given expression 2 √-24+6 is 9.8 i + 6".

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Solve each equation. Check your answers.
ln (t-1)²=3

Answers

t = 5.48 in ln (t - 1)² = 3, by properties of logarithm.

What is Logarithm?The opposite of exponentiation is the logarithm.This indicates that the exponent to which a fixed number, base b, must be raised in order to obtain a specific number x, is represented by the logarithm of that number.A number's natural logarithm is its logarithm to the base of the transcendental and irrational number e, which is roughly equivalent to 2.718281828459.

Now,

In ln ( t -1 )² = 3, by property of logarithm ( [tex]log_b(a)^m=m(log_b(a))[/tex]),

=> 2 ( ln (t -1) ) = 3

=> ln (t - 1) = [tex]\frac{3}{2}[/tex]

=> t - 1 = [tex]e^\frac{3}{2}[/tex]

=> t = [tex]e^\frac{3}{2}[/tex] + 1 = 4.48 + 1 = 5.48

Hence, t = 5.48 in ln (t - 1)² = 3, by properties of logarithm.

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Use natural logarithms to solve each equation.
e²x=12

Answers

In [tex]e^{2x}=12[/tex], x = 1.24, by the properties of logarithm.

What is Logarithm?The opposite of exponentiation is the logarithm.This indicates that the exponent to which a fixed number, base b, must be raised in order to obtain a specific number x, is represented by the logarithm of that number.A number's natural logarithm is its logarithm to the base of the transcendental and irrational number e, which is roughly equivalent to 2.718281828459.

Now,

In  [tex]e^{2x}=12[/tex], taking natural logarithm on both side.

=>  [tex]log_e(e^{2x})=log_e(12)[/tex]

=> 2x = 2.48 (approx)

=> x = 1.24

Hence, In [tex]e^{2x}=12[/tex], x = 1.24, by the properties of logarithm.

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is -3.5 a whole number integer or ratinoal

Answers

Answer:

Rational

Step-by-step explanation:

its not a whole number

3.5 is not a rational number it is an whole number interger

What is the absolute value of - 35?

Answers

Answer:

35.

Step-by-step explanation:

The term "absolute value" asks for the number without any negativity, e.g. distance. Even if you go backwards from your original spot, you still move.

5. Use the expression to answer th
-18-(-x)

Part A: Jerry claims this expression is equivalent to -18 + x. Do you agree or disagree? Explain.

Part B: Jerry claims this expression is equivalent to x-18. Do you agree or disagree? Explain.

Answers

Answer:

part A agree because two negatives cancel each other making a positive

part B agree x is still positive and 18 is still negative

how can sole this for me 3X + 1

Answers

Answer:

Not enough information.

Step-by-step explanation:

I don't believe this equation can be solved without more information, what process would you normally use to solve this equation? Do you know how many numbers X is worth? if not I would have to guess the answer would be 4x but i'm not sure that's correct.

Can ya'll help me with this please?

Answers

Answer: C.

Step-by-step explanation:

Solve for u.
−7+4u = − 35

Answers

for the equation - 7 + 4 u = - 35, we get the value of u after solving it as - 7.

We are given the equation:

- 7 + 4 u = - 35

We need to solve the equation for u.

- 7 + 4 u = - 35

Add 7 to both the sides, we get that:

- 7 + 4 u + 7 = - 35 + 7
4 u = - 28

Divide both the sides by 4, we get that:

4 u / 4 = - 28 / 4

u = - 7

Therefore, for the equation - 7 + 4 u = - 35, we get the value of u after solving it as - 7.

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Write the function rule g(x) after the given transformations of the graph of f(x) = 9x.

reflection in the x-axis; vertical compression by a factor of 1/3

g(x) = []

Answers

On reflecting f(x) = 9x in the x-axis and vertical compression by a factor of 1/3 we get the transformation g(x) where, g(x) = -3x

What is transformation of a function?

Transformation of the function means that the curve representing the graph either moves to the left or right or up or down or expansion , compression or reflection of graph happens.

Rules for reflection over x axis  :  for an curve y = f(x) , replace y by -y and keep x as it is, we get -y = f(x) or y = - f(x)

Rules for vertical compression by a factor α : y becomes αy .If f(x) is compressed by a factor of 1/2 the the transformations becomes 1/2(f(x))

Given function is f(x) = 9x

When we reflect f(x) over x axis then the transformations becomes some h(x) where h(x) = -f(x) =-9x

Now we want to vertically compress it by a factor of 1/3 , then this transformation will become g(x) = 1/3(h(x)) = 1/3(-9x) =(-9/3)x =-3x

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What is the solution to this inequality?

x/12 + 3 < 7

OA. x≤ 48
OB. x≤ 81
OC. x ≥ 48
O D. x≥ 81

Answers

x/12 + 3 < 7 = x<48 this is the only one i can do because i cant do the others sorry

Amir has 3 jars of sweets
Jar a contains 205 sweets
Jar c contains 175 sweets
Jar a has the most sweets and Jar c has the least of sweets how many sweets could be in jar b explain how you know this

Answers

The sweets in jar B in the box with Amir will be 190 sweats.

How to calculate the number?

From the information, Jar A contains 205 sweets. Jar c contains 175 sweet. Also, jar a has the most sweets and Jar c has the least of sweets.

The deets in jar B will be:

= (205 + 175) / 2

= 380 / 2

= 190

Therefore, the sweets in jar B in the box with Amir will be 190 sweats.

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Which expression is equivalent to quantity y raised to the negative second power times z raised to the third power end quantity over quantity z raised to the negative fourth power times y raised to the fifth power end quantity all raised to the negative second power?

Answers

The simplification of the given expression using laws of Indices is :

[tex]\frac{y^{14}}{z^{14}}[/tex]

How to use Laws of Indices?

We want to simplify the expression y raised to the negative second power times z raised to the third power end quantity over quantity z raised to the negative fourth power times y raised to the fifth power end quantity all raised to the negative second power.

The above can be expressed as :

[(y⁻² * z³)/(z⁻⁴ * y⁵)]^(-2)

Collecting like terms and When two terms that are divided have the same base and different exponents, we keep the base and subtract the exponents, hence :

= [(y⁻² * z³)/(z⁻⁴ * y⁵)]²

= [(z⁻⁴ * y⁵)/(y⁻² * z³)]²

= [(z⁻⁴/z³) x (y⁵/y⁻²)]²

= [z^{-4-3} x y^{5+2}]²

= [z^{-7} x y^{7}]²

Then both numerator and denominator exponents multiply by 2, hence the equivalent expression is :

= [tex][\frac{y^{7}}{z^{7}}]^{2} = \frac{y^{14}}{z^{14}}[/tex]

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what is greater 8/9 - 2/3 + 3/4 or 8/9 divided by 2/3 times 3/4

Answers

Answer:

i thank it is 8/9 divided by 2/3 times 3/4

Step-by-step explanation:

Determine the domain of the following graph:

Answers

Answer:

(-11, 11]

Step-by-step explanation:

The domain of a graph is the set of x-values.

An open circle means the endpoint is not included, whereas a closed circle means the endpoint is included.

Work out the median of these numbers:
7, 24, 3, 37, 14, 32

Answers

The median is 19

3, 7, 14, 24, 32, 37
— —

14 + 24 = 38

38 divided by 2 = 19

Find the difference. Write your answer in simplest form. 8 5/2 - 3 5/8

please fast

Answers

Answer:

[tex] \sf \: 6 \frac{ 7}{8}[/tex]

Step-by-step explanation:

Rewriting our equation with parts separated

=8+5/2−3−5/8

Solving the whole number parts

8−3=5

Solving the fraction parts

5/2−5/8=?

Find the LCD of 5/2 and 5/8 and rewrite to solve with the equivalent fractions.

LCD = 8

20/8−5/8=15/8

Simplifying the fraction part, 15/8,

15/8=1 7/8

Combining the whole and fraction parts

5+1+7/8= 6 7/8

my dog spent 4 days in the veterinary hospital.I spent 1585 dollars for the surgery,16.25. a day for board, and 49.75 for medicine.what is my total bill

Answers

Answer:

1651

Step-by-step explanation:

Add up the numbers, and you get your answer. [tex]1585+16.25+49.75=1651[/tex]

emir is standing in a treehouse and looking down at a swingset in the yard next door. the angle of depression from emir's eyeline to the swingset is 30.26°, and emir is 14 feet from the ground. how many feet is the base of the tree from the swingset? round your answer to the nearest foot.

Answers

The distance between base of tree and swing set is 24 feet.

We are given the angle of depression and the vertical height. Joining the three points, which are top and base of tree and swing set forms a right angled triangle. The height of tree will be perpendicular of triangle and base will be the distance between base of tree and swing set.

The angle at the swing set will be equal to 30.26°, as alternate angles are equal.

So, the angle formed can be related with perpendicular and base by -

tan theta = perpendicular ÷ base

Keep the values in formula to find the value of base

Base = perpendicular ÷ tan theta

Base = 14 ÷ tan 30.26°

Base = 14 ÷ 0.5834

Performing division

Base = 24

Hence, the distance between  base of tree and swing set is 24 feet.

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thats it, ima be also posting more if i dont get the question

Answers

The equation of this straight line is y = 50x + 100.

What is a linear function?

A linear function can be defined as a type of function whose equation is graphically represented by a straight line on the cartesian coordinate.

How to determine the equation?

In order to determine the equation from this graph of a linear equation, we would find the slope of the straight line by using this formula as follows:

[tex]Slope,\;m = \frac{Change\;in\;y\;axis}{Change\;in\;x\;axis}\\\\Slope,\;m = \frac{y_2\;-\;y_1}{x_2\;-\;x_1}[/tex]

Slope, m = 100/2

Slope, m = 50.

Mathematically, the standard form of the equation of a straight line is given by;

y = mx + c

Where:

x and y are the points.m is the slope.c is the intercept.

At point (4, 300), we have:

y = mx + c

300 = 50(4) + c

300 = 200 + c

c = 300 - 200

c = 100.

Therefore, the equation of this straight line is y = 50x + 100.

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What is another way to name line \ellℓell?

Answers

Since no line segment or reference diagram is provided in the question statement, considering ourselves a line as shown in the picture attached hereby, another name of the line "l" is UM.

As per the question statement, we are required to determine another name of the line, but no no line segment or reference diagram is provided, on whose basis, we were supposed to answer. Hence, we consider a line ourselves, as shown in the picture attached hereby, and then try to answer as per the question statement,

From the picture attached hereby, we can clearly see that, although the line "l" is a ray, it has two points "U" and "M" at the extremes, i.e., points U and M lie on the line. Hence, line "l" can be referred to as "UM" also.

Line: In geometry, a line is an object having infinite length and no width, depth, or curvature.

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Use the Change of Base Formula to rewrite each expression using common logarithms.
log₄9

Answers

The logarithmic expression changed by the base formula is ㏒₁₀9/㏒₁₀4.

What s defines as the logarithmic functions?

A number's logarithm is the exponent that a fixed value known as the base should be raised in order to generate that number. For example, because 1000 is 10 to a third power, the log of 1000 to base 10 is 3.

The y-intercept does not exist.A vertical asymptote is x = 0. *Note: An asymptote is a line which a graph approaches as the absolute value of x or y increases.There is no horizontal asymptote for a logarithmic function.The x-intercept is equal to one.The function is expanding across the domain.The function decreases out over domain if the base between 0 and 1.

Some rule of the logarithmic functions are-

Quotient Rule: ㏒(A/B) = ㏒A - ㏒BProduct Rule : ㏒A + ㏒B = ㏒(AB)Power Rule: n㏒A = ㏒AⁿBase Rule = ㏒ₐb = ㏒ₓb/㏒ₓaExponent Rule = e∧lnx = x

Now, as per the sated condition of the log function;

= log₄9

Now, use the Base Rule to re-write the expression;

= ㏒ₓ9/㏒ₓ4

or, for the base 10 this could be written as;

= ㏒₁₀9/㏒₁₀4

Therefore, the given logarithmic expression converted by the base formula is ㏒₁₀9/㏒₁₀4.

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6x + 9 +x+7
7x + 4 - 2x + 14
4+ 7x -x + 10
12+3x + 4x + 6
5x + 18 +2x - 2
x + 20 +4x -2
10x - 3x + 8 +6
12x + 10-5x + 8
12+3x+4x+6


Combining like terms
Matching Game
Set 1
Unmatched
Math idea galaxy
Directions: Simplify the
expression. Then, drag
each card next to its
matching pair. There
will be one without a
match.

Answers

565x + 2043

I am writing this extra because the app says the answer is to short :)

What single percentage change is equivalent to a 19% decrease followed by a 15% increase?

Answers

The single percentage change is 6.85%.

Here it is given that there is a 19% decrease and a 15% increase. And we have to find a single percentage change.

The formula of single percentage is

a + b + a .b/ 100

So let's take a = -19 as there is a decrease in the percentage and b = 15 as there is an increase.

So we get a single percentage = -19 + 15 - (19×15)/ 100

                                                    = - 4 -2.85

                                                    = -6.85

Therefore the single percentage change is 6.85%.

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Given the function f(x) = -x² - x + 7, find each of the following.
f(1), f(-7), f(y + 2)
f(1) = 7
f(-7)= -35
f(y + 2) =
(Simplify your answers. Type an integer or a fraction.)
...

Answers

The value of f (1) is 5.

The value of f (-7) is - 35.

The value of f (y + 2) is (-y²- 5y + 1).

What is Function?

A relation between a set of inputs having one output each is called Function.

The function is given as;

⇒ f(x) = -x² - x + 7

Now, To find value of f (1), substitute the value of x = 1 in given function and then calculate as;

⇒ f(x) = -x² - x + 7

⇒ f (1) = - (1)² - 1 + 7

⇒ f (1) = - 1 - 1 + 7

⇒ f (1) = 5

Hence, The value of f (1) is 5.

To find value of f (-7), substitute the value of x = -7 in given function and then calculate as;

⇒ f(x) = -x² - x + 7

⇒ f(-7) = -(-7)² - (-7) + 7

⇒ f(-7) = -49 + 7 + 7

⇒ f(-7) = - 35

Hence, The value of f (-7) is - 35.

To find value of f (y + 2), substitute the value of x = y+2 in given function and then calculate as;

⇒ f(x) = -x² - x + 7

⇒ f(y + 2) = -(y + 2)² - (y + 2) + 7

⇒ f(y + 2) = - (y² + 4y + 4) - y - 2 + 7

⇒ f(y + 2) = - y² - 4y - 4 - y - 2 + 7

⇒ f(y + 2) = -  y² - 5y + 1

Hence, The value of f (y + 2) is (-y²- 5y + 1).

So, The value of f (1) is 5.

The value of f (-7) is - 35.

The value of f (y + 2) is (-y²- 5y + 1).

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4. A standard die is rolled four times. What
is the probability that it shows a number
divisible by three all four times?
36,2 B
A 1/3
1
81
C
Apply
6
11/22

Answers

Answer:

C - 1/81

Step-by-step explanation

There are 6 sides on a standard die (1, 2, 3, 4, 5, 6). Out of these numbers, only 3 and 6 are divisible by 3. Therefore, 2/6 numbers would be divisible by 3. As the die is rolled 4 times, we multiply 2/6 4 times - (2/6)(2/6)(2/6)(2/6) to get 1/81. The probability that the die shows a number divisible by three all four times is 1/81. Hope that helps!

Please answer the question in the screenshot! I need help! NOW!

Answers

Answer:

Step-by-step explanation:

C

A system of equations is shown.
{9x - y = 4
9x - y = -4
Which statement about the system of equations is true?

Answers

Answer:

No solution.

Step-by-step explanation:

There is not an number that I can put in for x and y and get the answer 4 and -4.

Answer:

No solutions

Step-by-step explanation:

Given system of equations:

[tex]9x - y = 4 \\ 9x - y = -4[/tex]

Let us substitute the equation 9x - y = 4 into the second equation:

[tex]\implies 9x - y = -4[/tex]

[tex]\implies 4 = -4 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ [9x - y} = 4} ][/tex]

But 4 = -4 is not possible, as they are opposite integers. Since 4 ≠ -4, there are no solutions for the given system of equations.

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Solve. 3(x+3)³/₄=81

Answers

x = 78

The equation given is

   3[tex](x + 3)^{3/4}[/tex]= 81

first we will divide 3 of the right side to left side number which is 81

i.e 81/3 = 27

So we get the equation

[tex](x + 3)^{3/4}[/tex] =27

We can also write the equation as

[tex](x + 3)^{3/4}[/tex]= [tex]3^{3}[/tex]

[tex][(x + 3)^{1/4]^{3}[/tex]= [tex]3^{3}[/tex]

So from, this we get

[tex](x + 3)^{1/4}[/tex] = 3

Now we have to side with the multiply both power of four(4)

[tex][ (x + 3)^{1/4}]^{4}[/tex]= [tex]3^{4}[/tex]

we get

x + 3 = 81

x = 78

So the value of x is 78.

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ESTIMATING RESULTS The figures show the number of taxpayers and the federal tax revenue for the United States in 2018.
Estimate the United States federal tax revenue per taxpayer.
US TAXPAYERS
122,176,626
T
US FEDERAL TAX REVENUE
$3,307,673,720,131

Answers

Answer:

$27,072.88

Step-by-step explanation:

$3,307,673,720,131 ÷ $122,176,626

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