r(x)=-x-7 when x=-2,0, and 5

Answer:

f(-3) = -26

Step-by-step explanation:

f(n)=7n-5; f(-3)

f(-3) = 7(-3) - 5

f(-3) = -21 - 5

f(-3) = -26

I hope this helps!

Since the line Lloyd drew also passed through the point (1, n) for some number n, the number n represents: (A) the price, in dollars, per ounce of pumpkin.

A graph can be defined as a type of chart that's commonly used to graphically represent data on both the horizontal and vertical lines of a cartesian coordinate, which are the x-axis and y-axis.

In Mathematics, the points on a cartesian coordinate are generally written as an ordered pair (x, y) which represents the horizontal line and vertical line respectively.

Since the line Lloyd drew also passed through the point (1, n) for some number n, we can reasonably infer and logically deduce that the number n represents the price, in dollars, per ounce of pumpkin.

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Complete Question:

Lloyd bought two pumpkins. On a coordinate grid, he plotted each pumpkin’s weight (x), in ounces, and price (y), in dollars. He then drew a straight line that passed through both points and the origin. The line he drew also passed through the point (1, n) for some number n. What does the number n represent?

(A) the price, in dollars, per ounce of pumpkin

(B) the price, in dollars, of one of the pumpkins

(C) the weight, in ounces, of one of the pumpkins

(D) the weight, in ounces, of a pumpkin with a price of $1.00

Answer:

i THINK im not sure but i think its C please let me know if im wrong

Step-by-step explanation:

Answer: .8 or 4/5

Step-by-step explanation:

You can do this a couple ways.

1) what you started is right, you can change your fraction into a decimal and divide.

2/5 = .4

.32/.4 = .8

2) you can change .32 into 32/100 and divide by 2/5

32/100 divided by 2/5

When you divide fractions, you flip the divisor and multiply

32/100 x 5/2

Multiply across

160/200

Simplify

4/5

The density of an object with a mass of 180 grams and a volume of 45 cm is 0.4 kg/m.

What is density?

So the formula will be d = m / v

The mass of the object is 180 g

The volume of the object is 45 cm

Putting the value in the formula

d = 180 g / 45 cm = 0.4 kg/m

Thus, the density of an object will be 0.4 kg/m.

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Answer:

Hey!  the breadth is 12 m and the length is 12+6=18 m

Mark me as brain?

Step-by-step explanation:

let the breadth be X metre

so the length will be 6+ x metre

perimeter is equal to 60 m

2(6+x+x)=60

2 (6+2x)=60

12+4x=60

4x=60-12=48

x=48/4=12

so

The simplified expression of 6 -√25 + √4 is 3

Expressions are mathematical statements that are represented by variables, coefficients and operators

The expression is given as

6 -√25 + √4

Evaluate the exponents

So, we have

6 -√25 + √4 = 6 - 5 + 2

Evaluate the difference

So, we have

6 -√25 + √4 = 1 + 2

Evaluate the sum

So, we have

6 -√25 + √4 = 3

Hence, the simplified expression of 6 -√25 + √4 is 3

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Answer:

Step-by-step explanation:

6-√√25= 0.25

-2-√15/2= A, -2.94

x=5+√-49/6= C, 5/6+7/6i

The function that models the inverse variation is y = -56/x.

So,

Then,

Since x · y = C then we obtain:

Therefore, the function that models the inverse variation is y = -56/x.

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The solution of the equation √5 x + 1 - 2√x = 1 is [tex]\frac{4}{5}[/tex].

An extraneous solution is one that results from the process of addressing the problem but is not a legitimate solution to the problem, such as the answer to an equation.

Consider the equation,

√5 x + 1 - 2√x = 1

Subtracting 1 from each side of the equation.

√5 x + 1 - 2√x - 1 = 1 - 1

√5 x - 2√x = 0

√5 x = 2√x

Dividing each side of the equation by √x.

( √5 x/√x ) = ( 2√x / √x )

√(5x) = 2

Squaring each side of the equation.

[ √(5x) ]² = (2)²

5x = 4

Dividing by 5 from each side of the equation.

( 5x/5 ) = ( 4/5)

x = 4/5

Now checking the extraneous solution:

[tex]\sqrt{5}x + 1 -2\sqrt{x} =1\\\sqrt{5}(\frac{4}{5} ) + 1 - 2(\sqrt{\frac{4}{5} } ) = 1\\ \frac{4}{\sqrt{5} } + 1 - \frac{4}{\sqrt{5} } = 1\\ 1 = 1[/tex]

The solution for the equation is 4/5.

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The answers will be :

a. The equation of perpendicular bisector of QR is y = [tex]\frac{-5}{3}[/tex] x + 3.

b. The slope of median of triangle passing through point R is 1/4.

c. The slope of the altitude of the triangle that passes through point R doesn't exists.

What is slope of a line segment ?

Slope is the ratio of the difference in y-coordinates over the equivalent x-coordinates between two different locations on a line.

It is given that the vertices of a triangle are P(-6,1), Q(-2,-5) and R(8,1).

a.

The midpoint (M) of QR will be equal to

( [tex]\frac{-2 + 8}{2} , \frac{-5 + 1}{2}[/tex] )

or

M = (-3 , 2)

Now , slope of line QR will be ;

[tex]m_{QR}[/tex] = [tex]\frac{1+5}{8+2}[/tex]

[tex]m_{QR}[/tex] = 6 / 10

We know that :

m × [tex]m_{QR}[/tex] = -1

m = -10 / 6

or

m = -5 / 3

Equation of line will be given as :

y + 2 = [tex]\frac{-5}{3}[/tex] ( x - 3 )

y = [tex]\frac{-5}{3}[/tex] x + 3

b.

The midpoint of PQ will be :

= ([tex]\frac{-6 - 2}{2} , \frac{1 - 5}{2}[/tex])

= ( -4 , -2)

The slope of median of triangle that passes through point R will be ;

m = [tex]\frac{-2 - 1}{-4-8}[/tex]

m = -3 / -12

m = 1/4

or

m = 0.25

c.

Slope of altitude of triangle that passes through point Q will be :

m = [tex]\frac{1 - 1}{-6-8}[/tex]

m = 0 / -14

m = 0

The slope in this case doesn't exist.

Therefore the answers will be :

a. The equation of perpendicular bisector of QR is y = [tex]\frac{-5}{3}[/tex] x + 3.

b. The slope of median of triangle passing through point R is 1/4.

c. The slope of the altitude of the triangle that passes through point R doesn't exists.

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Solution of exponential equation is , x =  [tex]800. 7^4[/tex]

In, mathematics a exponential equation or exponential function is inverse of logarithmic function. That means, we can easily convert the logarithmic function into exponential function and vice versa. The basic form of the logarithm function can be written as  [tex]a^x[/tex] .

where, a = the base of function

           x = main expression

Mathematically, if  [tex]log_aN = x[/tex] is an logarithmic function then, this can be converted to exponential function as  [tex]a^x = N[/tex].

There are many formulas that are given to us for solving several simple and complex problems based on exponential functions and exponential equations.

Some important formulas of exponential :

According to given statement,

[tex]7^{-4} x = 800[/tex]

=> [tex]\frac{1}{7^4} x = 800[/tex]

=> [tex]x = 800 . 7^4[/tex]

Thus solution for this equation is x =  [tex]800. 7^4[/tex]

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The complete question is :

What is the solution of each exponential equation? Check your answer.

a. 7⁻⁴x=800

b. 5.2³x=400

The correct statements among given statements are statement C and E.

What is a rational number ?

If p & q are any two numbers where q is not equal to 0, then the fraction in form p/q is called as rational number.

A number is given which is √22.

√22 = 4.69041576

Let's check which of the statements are correct.

A.

√22 is not rational number as the number has non - terminating decimal value which is 4.69041576 and it doesn't lies between 10 and 12. So , this option is not correct.

B.

This option is also not correct as the value of √22 nearly equals 4.69 is and not greater than 4.691.

C.

The value of √22 is 4.69041576.

If we round off to the nearest hundredth , 9 is at the hundredth place , so the value will be 4.69. This is a correct option.

D.

√22 is not a rational number as the number has non - terminating decimal value which is 4.69041576 but it lies between 4 and 5. So , this option is not correct.

E.

The value of √22 is 4.69041576. We can observe that the decimal number doesn't repeat. So , this is a correct option.

F.

As we know √22 is not a rational number we can't represent it as fraction. This option is not correct.

Therefore , the correct statements among given statements are statement C and E.

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Answer:

23

Step-by-step explanation:

x=3  PEMDAS says that exponents go first so 3x3=9  then 2x9=18+5=23

Based on the fact that no less than a third of the juniors went to prom and there were 37 juniors, the minimum amount of juniors at the school was 111 juniors

The school paper reported that out of the total juniors in school, no less than a third juniors went to prom.

We also know that 37 juniors went to prom. Assuming that 37 juniors represents a third of the juniors, the minimum amount of juniors at the school can be found as:

= Number of juniors who went to prom / Proportion of juniors who went to prom

Solving for the minimum amount of juniors at the school gives:

= 37 / 1/3

= 37 x 3/1

= 111 juniors

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Answer:

222

Step-by-step explanation:

Answer:

Step-by-step explanation:

Try the code AEAA. Let me know if its right or not.

Answer:

CHGD

Step-by-step explanation:

You should actually solve each of these puzzles to get the right code
1. To evaluate f(-2)

We have f(x) = x³ - 2x

Substitute -2 for x

==> (-2)³ - (2 x-2)
-2³ = -8
2 x -2 = -4

==> f(-2) = -8 - (-4)
==> f(-2) = -8 + 4      (two negatives make a positive
==> f(-2) = -4            Letter C

2. Evaluate g(-10)
[tex]g(x) = \dfrac{3x}{2}[/tex]

[tex]g(-10) = \dfrac{3 \times -10}{2} \\= \dfrac{-30}{2} \\\\= \boldsymbol{-15}[/tex]        Letter H

3. Evaluate h(-1)
h(x) = 2x² + x
h(1) = 2 x (-1)² - 1

= 2 x 1 - 1

= 1            Letter G

4. Evaluate f(3)
f(x) = x³ -2x
f(3) = 3³ - 2 x 3

= 27 - 6

= 21              Letter D

So the correct code is CHGD

You got everything right except the third :)

Answer:

n = (W - Z)/a

Step-by-step explanation:

W = an + Z

Rearrange the equation so that the subject is alone, in the format Ax = B

W = an + Z

W - Z = an + Z - Z

W - Z = an

Isolate the subject by dividing or multiple so that the equation is in the format x = C

W - Z = an

(W - Z)/a = an/a

(W - Z)/a = n

Answer:

(y - y1) = m(x - x1)

Step-by-step explanation:

(y - y1) = m(x - x1)

Answer:

Exactly $13.125 (approx $13.13)

Step-by-step explanation:

52.50 divided by 4 is 13.125. 1 shirt costs exactly $13.125. Round the half cent up to a whole cent.

The value of the expression ∛ - 7. ∛ 49 after multiplying it and simplifying it, we get the result as - 7.

We are given the expression:

∛ - 7. ∛ 49

We need to multiply and simplify it.

We will first multiply the expression:

= ∛ - 7 × 49

Solving it, we get that:

= ∛ - 343

Now this can also be written as:

= ∛ (- 7 )³

Now, simplifying the cube root to get the value of the expression:

= - 7

Therefore, we get that, the value of the expression ∛ - 7. ∛ 49 after multiplying it and simplifying it, we get the result as - 7.

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The translation of word problems into mathematics equations enables the determination and prediction of precise values in real life situations.

First part:

The work rate of one person if 3 people takes two days to do a job is given by the equation;

[tex] \frac{1}{C} + \frac{1}{C} + \frac{1}{C} = \frac{3}{C} = \frac{1}{2} [/tex]

Which indicates that one person takes 6 days to get the same work done

Second part;

Where the costs of a combination of cakes and orange drinks can be expressed using the equations;

2•c + o = 0.4

3•c + 3•o = 0.9

It indicates that a cake costs $0.1, and an orange drink costs $0.2

Third part;

Precision is required to conduct a scientific experiment remotely

A word problem in science is the expression of sufficient or significant background information of a problem is given using every day language, rather than using mathematical notations.

First part;

An example word problem is as follows;

The translation of the above question is as follows;

Let C represent the work rate or the number of days one person takes to do the same work, we have;

[tex] \frac{1}{C} + \frac{1}{C} + \frac{1}{C} = \frac{3}{C} = \frac{1}{2} [/tex]

Which gives;

[tex]C = \frac{3}{ \frac{1}{2} } = 6[/tex]

The number of days it takes one person to do the work, C = 6 days

Second part;

A word problem that involves multi step linear equations is as follows;

How much does a cake cost

How much does an orange drink cost

Solution;

Let c represent the cost of a cake and let o represent the cost of an orange drink, we have;

2•c + o = 0.4...(1)

3•c + 3•o = 0.9...(2)

Multiplying equation (1) by 3 and subtracting equation (2) from the result, gives;

3×(2•c + o) - (3•c + 3•o) = 3×0.4 - 0.9

Which gives;

3•c = 0.3

c = 0.3/3 = 0.1

c = 0.1

The cost of one cake, c = $0.1

From equation (1), we have;

2•c + o = 0.4

Which gives;

2×0.1 + o = 0.4

o = 0.4 - 2×0.1 = 0.2

The cost of one orange drink, o = $0.2

Third part;

The consequence that might occur if the measurement were not precise is that the vehicle and equipment may not be able to make it back to the surface.

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The equation that can be used to determine the value of x is 7x + 18 = 65

Angles are formed when two or more lines intersect. This in other words means that angles is the measure of space between the intersection of rays or lines

The figure that completes the question is added as an attachment

The given parameter is the angles in the figure

From the figure, we have the following angles:

Angle 1 = 23

Angle 2 = 7x - 5

Angle 3 = 67

The relationship between the above angles is

Angle 1 + Angle 2 = Angle 3

This is so because the angles 1 and 2 are adjacent angles and they add up to angle 3

Substitute the known values in the above equation

So, we have

23 + 7x - 5 = 65

Collect the like terms in the above equation

So, we have

23 - 5 + 7x  = 65

Evaluate the like terms in the above equation

So, we have

18 + 7x  = 65

Rewrite the above equation as

7x + 18 = 65

Hence, the equation that can be used to determine the value of x is 7x + 18 = 65

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Answer: i cheated last year so i dont remember any of this

Step-by-step explanation:

Answer:Solution

Result will not divisible by 3

5

3

×2−8=250−8=242

If we divide 242 by 3 it will leave reminder 2.

Step-by-step explanation:

The equation is given by A = n³ - 8 , where n is a number

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

Let the number be represented as n

A = 8 is subtracted from the cube of a number

Substituting the values in the equation , we get

A = n³ - 8   be equation (1)

Now , when 8 is subtracted from twice the cube of 5 , the result is not divisible by 3

So , A = 2 x 5³ - 8

A = 242 which is not divisible by 3

Hence, the equation is A = n³ - 8

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Answer:

82

Step-by-step explanation:

if g(3)= substitute a as 3 = (3)^3 +5(3)^2= 27+45= 72

if f(3)= substitute a as 3= 2(3) +4=10

join them up since it said there to add  g(3) +f(3)

72 +10= 82