Write and solve a logarithmic equation.

Answer:

0.99 or 99%

Step-by-step explanation:

This is actually much more simple than it sounds

Take 95% and add 80% of 5 because 5% of the time the QK piece will not work. 80% of 5 is 4. 95+4=99

Step-by-step explanation:

6 = 5/2x + k

6 = ( 5/2 . 2/1) + k

6 = 10/2 +k

6-5 = k

k = 1

After solving the expression 3-√(x-3)=x algebraically, we get the result as  3.

Isolate the square root from the left hand side √x-3 = 3-x

Eliminate the radical on the left hand side by squaring on both sides-

Both sides must be raised to the second power.    

(√x-3)² = (3-x)²  

After squaring we get       

x-3 = x²-6x+9

Solving the quadratic equation-

We get rearranged equation as -

x²  - 7x  + 12 = 0

(x-4)(x-3)=0

x=4,3

Check if the first solution is correct by putting it in original equation-

putting x=3 in 3-√(x-3)=x  we get 3-0=3

Hence 3 is correct.

Check if the second solution is correct by putting it in original equation-

putting x=4 in  3-√(x-3)=x  we get 3-1=4 which is not true

hence 4 is rejected.

Therefore, after solving the expression 3-√(x-3)=x algebraically, we get the result as  3.

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Step-by-step explanation:

so, MN + NO = MO

MO = 50 miles

MN = 45 miles

therefore,

45 + NO = 50

NO = 50 - 45 = 5 miles

On multiplying and then simplifying 3∛2x² . 7 ∛32x⁴, we get, 84x⁶

1. Split the radicands in half. A number known as a radicand appears underneath the radical symbol.

2. To multiple radicands, multiply the integers as if they were whole numbers. Always keep the item beneath a single radical sign.

3. Use factoring to exclude any perfect squares from the radicand. To achieve this, check whether any perfect squares have the radicand as a factor.

4. Position the square root of the ideal square before the radical sign. Don't change the second component of the radical symbol.

5. Square the square's root. Sometimes it is necessary to multiply a square root by itself.

Given,

3∛2x² . 7 ∛32x⁴

⇒ [tex]21 (2^{1/3} ) x^{2+4} . 32^{1/3}[/tex]

⇒ [tex]21 (2^{1/3} ) x^{6} . 2^{5/3}[/tex]

⇒ [tex]21 (2^{1/3 + 5/3} ) x^{6}[/tex]

⇒ [tex]21 (2^{2} ) x^{6}\\84x^{6}[/tex]

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The value of the modulus function |5x| = 3 is x = 3/5 or x = -3/5.

In  mathematics modulus function is the absolute or numerical value of the function irrespective of the sign.It represents magnitude.We modulus functions when we want length, mass and for other variables when we want to represent their weight.

According to the given question |5x| = 3.

We know |x| = a implies x = a or x = -a.

∴ |5x| = 3 is

5x = 3

x = 3/5

Or

5x = -3.

x = -3/5.

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Answer:

x² + 5x + 8

Step-by-step explanation:

This issue is about "function composition",

(g ° f) means

g(f(x)) = g(x² + 5x +6)

= x² + 5x +6 + 2

= x² + 5x +8

Answer:

23 and 26? which numbers would you like to know?

Step-by-step explanation:

x = 5 is not an extraneous solution of the equation.

✓(2x + 6) - ✓(x - 1) = 2

✓(2x + 6) = 2 + ✓(x - 1)

Squaring both the sides of equation, we get

(✓(2x + 6))² = (2 + ✓(x - 1))²

2x + 6 = (2)² + (✓(x - 1))² + 2(2)(✓(x - 1))

2x + 6 = 4 + x - 1 + 4(✓(x - 1))

x + 3 = 4✓(x - 1)

Squaring again on both the side of the equation, we get

(x + 3)² = (4✓(x - 1))²

x² + 3² + 2×3×x = 16(x - 1)

x² + 9 + 6x = 16x - 16

x² - 10x + 25 = 0

By applying middle term splitting on equation (1), we get

x² - 5x - 5x + 25 = 0

x(x - 5) -5(x - 5) = 0

(x - 5) (x - 5) = 0

x = 5 and 5.

Check for extraneous solutions by putting value of x in original equation -

✓(2×5 + 6) - ✓(5 - 1) = 2

✓16 - ✓4 = 2

4 - 2 = 2

2 = 2

LHS = RHS

x = 5 is not an extraneous solution of the equation.

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Answer:

Its 3D 6U

or -2/-2

Step-by-step explanation:

The values of x and y of the parallelogram PQRS are x = 2 and y = 11

We're given the dimensions of parallelogram PQRS as;

PT = y

TR = 5x + 1

QT = 2y

TS = 6x + 10

T is the intersection of the two diagonals PR and QS and so the diagonals bisect each other.

The diagonal PR is cut into PT and TR, both of which are congruent or equal. Thus, PT = TR.

Similarly, the other diagonal QS is split in half as well. The two equal pieces are QT and TS. So QT = TS.

PT = TR

y = 5x + 1

and

QT = TS

2y = 6x + 10

Plugging the values gives;

2y = 6x + 10

2(y) = 6x + 10

2(5x + 1) = 6x + 10

2*5x + 2*1 = 6x + 10

10x + 2 = 6x + 10

10x + 2 - 6x = 6x + 10 - 6x

4x + 2 = 10

4x + 2 - 2 = 10 - 2

4x = 8

4x/4 = 8/4

x = 2

If x = 2, then y is...

y = 5x+1

y = 5*x+1

y = 5*2+1

y = 10+1

y = 11

Thus, the values of x and y of the parallelogram PQRS are x = 2 and y = 11

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Answer: a. 1

b. 12

c. 2x+11

Step-by-step explanation:

f(x) = 2x+5

a. f(-2)=

2(-2)+5=

-4+5=1

b. f(1)+5=

2(1)+5+5=

2+5+5=12

c. f(x+3)=

2(x+3)+5=

2x+6+5=2x+11

Answer:

B - 5

Step-by-step explanation:

Amy = 8 packs × 7 snacks

Amy = 56 snacks altogether

Mary = Amy - 11

Mary = 56 - 11

Mary = 45 snacks altogether

Mary = 45 snacks / 9 tropical fruit snacks

Mary = 5 packs of tropical fruit snacks

Hope this Helps! :)

- Riona

Answer:

112

Step-by-step explanation:

3y^2 + 7y + 2

if y = 5, then 3(5^2) + 7(5) + 2

= 3(25) + 35 + 2

= 75 + 37

= 112

Answer:

Step-by-step explanation:

12z=108 what’s the value of z

12z = 108

z = 108 : 12

z = 9

check

12 * 9 = 108

108 = 108

the answer is good

A composite function exists as a function that depends on another function. The values for f(g(x)) = 4x-7 and g(f(x)) = 4x -28

In mathematics, function composition exists as an operation ∘ that takes two functions f and g, and has a function h = g ∘ f such that h(x) = g. In this operation, the function g exists used to the result of applying the function f to x.

Function composition is a mathematical procedure where two functions, f, and g, are taken and a function, h = g ∘ f, is produced such that h(x) = g(f(x)). The function g exists used in this operation on the outcome of applying the function f to x.

Let the two functions be f(x) = -x-7 and g(x) = 4 x

f(g(x)) = f(4x)

f(4x) = 4x-7

g(f(x)) = g(x-7)

simplifying the above equation, we get

g(x-7) = 4 (x - 7) = 4x -28

g(x-7) = 4x - 28

Therefore, the value of f(g(x)) = 4x-7 and g(f(x)) = 4x -28

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The calorie serving in simplest form is 56.5

The rate in mentioned question will be number of calories present per serving.  

So writing the given information in the form of rate -

Rate of calorie per serving = 452/8

Now, to convert the rate of calories in simplest form, we will perform division of both numerator and denominator of fraction by a common number. We can directly divide the numerator and denominator of fraction with 8. Else, we can perform division by simpler numbers too.

Indirect method -

Lets begin the division by 4

Rate of calorie per serving = 113/2

Further dividing by 2

Rate of calorie per serving = 56.5

Direct method will also give the same result, which is rate of calorie per serving = 56.5.

Hence, in simplest form (decimal) the rate of calorie per serving is 56.5.

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The equation of the line in the graph in slope-intercept form is: y = -5x - 30.

To be able to write the equation of a line in slope-intercept form, y = mx + b, find the value of the slope (m) = rise/run, and the value of the y-intercept (b), which is the value of y where the line intercepts the y-axis.

From the given graph, we have:

Slope (m) = rise/run = -50/10

Slope (m) = rise/run = -5

The y-intercept (b) = -30

Substitute m = -5 and b = -30 into y = mx + b:

y = -5x + (-30)

y = -5x - 30

Thus, the equation of the line in the graph in slope-intercept form is: y = -5x - 30.

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Given the initial speed and time elapsed by the car, the negative acceleration that brings the car to a stop at the red light is -5.56m/s².

Newton's first equation of motions states that;

v = u + at

Where v is final velocity, u is initial velocity, a is acceleration and t is time.

Given the data in the question;

First, convert the unit of the initial velocity from kilometer per hour to meter per seconds

Initial velocity = 80 km/h = ( 80 × 5/18 )m/s = 2.2222 m/s

Now, plug these values into the equation above and solve for a.

v = u + at

0 = 22.2222m/s + ( a × 4s )

a × 4s = -22.2222m/s

a = 22.2222m/s ÷ 4

a = -5.56m/s²

Negative sign shows that the car is slowing down.

Given the initial speed and time elapsed by the car, the negative acceleration that brings the car to a stop at the red light is -5.56m/s².

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Answer:

Probably puberty

Joy was charged the labor of 11 hours .

Joy was charged a total of $1215 from the landscaper for listed parts and labor.

He was charged $445 for listed parts

He was charged the rest for labor

The hourly rate for labor is $ 70

Let the number of hours worked by labor be x

so, we can form a linear equation here as 445 + 70x = 1215

Now we have to solve this linear equation

445 + 70x = 1215

70x= 1215 - 445

70x = 770

x = 770/ 70

x = 11

Therefore, 11 hours of labor were needed to complete the job.

The correct question is Joy recently hired a landscaper to do some necessary work. On the final bill, Joy was charged a total $1215.  $445 was listed for parts and the rest for labor. If the hourly rate for labor was $70, how many hours of labor were needed to complete the job?

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The new mean 101.5 is greater than the previous mean 94.

By adding up all the numbers in a data collection and dividing by the total number of values in the set, the mean (average) of the data set can be determined. The median is the middle when a data set is sorted from least to greatest.

The distribution of a basketball team's score with a mean of 94 points per game and a high of 109 for the first 20 games.

Mean = 94,

Points per game = 94, 110, 102, 93, 98, 99, 121, 96, 94, and 108 points.

Therefore,

The new mean = ( sum of observations) / Number of observations

New mean = ( 94 + 110 + 102 + 93 + 98 + 99 + 121 + 96 + 94 + 108) / 10

New mean = 1015 / 10

New mean = 101.5

101.5 > 94

Now, the new mean is greater than the previous mean.

Hence, the correct option is (A).

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1.  The probability given as P(Y∩X) is; 2/25

2. The probability given as P(Y) * P(X) is; 4/15

We are given the following probabilities;

P(X) = 2/3 , P(Y) = 2/5 , and P(X|Y) = 1/5

1. We want to find P(Y ∩ X).

This means probability of the set intersection of Y and X

Since  P(X) = 2/3 , P(Y) =2/5 , and P(X|Y) =1/5, it means that we have a conditional probability.

Thus;  P(Y∩X) = P(Y) * P(X|Y)

P(Y∩X) = 2/5 × 1/5

P(Y∩X) = 2/25

2. We want to find P(Y) * P(X)

Plugging in the relevant values gives;

P(Y) * P(X) = 2/3 × 2/5

P(Y) * P(X) = 4/15

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Complete question is;

For two events X and Y, P(X) =2/3 , P(Y) =2/5 , and P(X|Y) =1/5 . Find the probabilities.

1.  P(Y∩X) = ____

2. P(Y)· P(X) =____

Step-by-step explanation:

BQS=78

BQN=48

BQS+BQN=78+48=126

180-126=54°

NQS=54°

comfirm=BQN+BQS+NQS=180

48+78+54=180

Answer:

30°

Step-by-step explanation:

∠NQS + ∠BQN = ∠BQS

Knowing this information, we use the known measures to find ∠NQS

∠NQS + 48° = 78°

∠NQS = 78° - 48°

∠NQS = 30°

Thus, angle NQS is 30 degrees.

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The temperature at dawn is -7 F.

If it is  8 degrees colder at dawn than it is at dawn, it means that the temperature is lower in the dawn than it is in the dusk. Thus, to determine the temperature at dawn, subtract 8 from the temperature at dusk.

Subtraction is the mathematical operation that is used to determine the difference between two or more numbers. The sign used to represent subtraction is -.

Temperature at dawn = termpature at dusk - difference in termpature

1 - 8 = -7

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Correct answer is D. Nothing can be determined from the given graph.

A graph is a type of graphic used to display data and show relationships. Graph analysis is helpful for identifying the overall trend, connecting experiment findings to the hypothesis, and creating hypotheses for next studies.

You may compare various figures, comprehend how various components affect the overall, or examine patterns using a chart or graph. Charts and graphs can also be helpful for seeing data that deviates from what you're used to or for assisting in the understanding of group relationships.

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Answer:

15

Step-by-step explanation:

Answer:

The number is 1

Step-by-step explanation:

Let the number be x
Subtract 8 from x ==>   x - 8

Multiply by -3 ==>         -3(x - 8) = -3(x) -3(-8) = -3x - 24

This equals 21

So
-3x + 24 = 21

Subtract 24 from both sides:
-3x + 24 - 24 = 21 - 24

==> -3x + 0 = - 3

-3x = -3

Divide by -3

==> -3x/-3 = -3/-3

x = 1

Check

1 - 8 = -7

-3(1-8) = -3 x -7 = 21

The cost per cup of milk as required in the task content is; $0.14375.

The cost per fluid ounce of milk as required in the task content is; $0.018.

The cost per quart of milk as required in the task content is; $0.575.

It follows from the task content that the cost of each unit measure of milk is to be determined. Therefore, since the cost per gallon of milk is; $2.30.

1). Since there are 16 cups of milk per gallon, it follows that the cost per cup of milk is; 2.30/16 = $0.14375

2). Also, Since there are 128 fluid ounces of milk per gallon, it follows that the cost per fluid ounce of milk is; 2.30/128 = $0.018

3). Also, Since there are 4 quarts of milk per gallon, it follows that the cost per quart of milk is; 2.30/4 = $0.575

Ultimately, the cost per unit measure of milk in each case scenario has been determined and is as represented above.

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From the given distribution, we have that:

a) The distribution is skewed to the left.

b) The median is of 74.

c) The mean will be smaller than the median.

Since life expectancies are clustered at the high end, the outliers are small life expectancies, meaning that the mean will be smaller than the median and the distribution is skewed to the left.

The median of a data-set is the 50th percentile, the value that separates the bottom 50% of the data-set from the upper 50%.

In this problem, we have that about half of all the countries having a life expectancy between about 74 and the maximum of 84.7, meaning that 74 is the median.

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The probability that the student will answer at least 10 questions correctly from a multiple-choice examination that has 15 questions, each with five possible answers and only one of which is correct is 0.00

Let P (C) = probability of a student picking a correct option is

P (C) = (Required outcome)/(Total outcome)

Required outcome = numbers of correct option

Total outcome = total numbers of option

P (C) = 1/5

Recall that

P (C) + P (C1) = 1

 Where P (C1) is the probability of picking wrong option

P(C)+P(C^1 )=1

1/5+P(C^1 )=1

P(C^1 )=1-1/5

P(C^1 )=4/5

The probability of answering at least 10 questions correctly can be solved by using Binomial probability which states that

P(x)=(nCx) (p)^x (q)^(n-x)

P(x) is the probability of an event

n is the number of trial (15)

x number of specific outcome

p is the probability that the event will happen (1/5)

q is the probability that the event will not happen (4/5)

      Probability of answering at least 10 questions correctly will be

P(10) + P(11) + P(12) + P(13) +P(14) + P(15)

P(x)=(nCx) (p)^x (q)^(n-x)

P(10)=(15C10) (1/5)^10 (4/5)^(15-10)

P(10)=(15C10) (1/5)^10 (4/5)^5

15C10=15!/((15-10)!(10!))

15C10=15!/((5)!(10!))

15C10=1307674368000/((120)(3628800))

15C10=1307674368000/43545600

15C10=3003

P(10)=(3003) (0.2)^10 (0.8)^5

P(10)=(3003)(1.024×〖10〗^(-7))(0.32768)

P(10)=0.0001

P(11)=(15C11) (1/5)^11 (4/5)^(15-11)

P(11)=(15C10) (1/5)^11 (4/5)^4

15C11=15!/((15-11)!(11!))

15C11=15!/((4)!(11!))

15C11=1307674368000/((24)(39916800))

15C11=1307674368000/958003200

15C11=1365

P(11)=(1365) (0.2)^11 (0.8)^4

P(11)=(1365)(2.048×〖10〗^(-8))(0.4096)

P(11)=0.000011

P(12)=(15C12) (1/5)^12 (4/5)^(15-12)

P(12)=(15C12) (1/5)^12 (4/5)^3

15C12=15!/((15-12)!(12!))

15C12=15!/((3)!(12!))

15C12=1307674368000/((6)(479001600))

15C12=1307674368000/2874009600

15C12=455

P(12)=(455) (0.2)^12 (0.8)^3

P(12)=(455)(4.1×〖10〗^(-9))(0.512)

P(12)=0.0000009542

P(13)=(15C13) (1/5)^13 (4/5)^(15-13)

P(13)=(15C13) (1/5)^13 (4/5)^2

15C13=15!/((15-13)!(13!))

15C13=15!/((2)!(13!))

15C13=1307674368000/((2)(6227020800))

15C13=1307674368000/12454041600

15C13=105

P(13)=(105) (0.2)^13 (0.8)^2

P(13)=(105)(8.19×〖10〗^(-10))(0.64)

P(13)=0.00000005505

P(14)=(15C14) (1/5)^14 (4/5)^(15-14)

P(14)=(15C14) (1/5)^14 (4/5)^1

15C14=15!/((15-14)!(14!))

15C14=15!/((1)!(14!))

15C14=1307674368000/((1)(87178291200))

15C14=1307674368000/87178291200

15C14=15

P(14)=(15) (0.2)^14 (0.8)^1

P(14)=(15)(1.638×〖10〗^(-10))(0.8)

P(14)=0.00000000197

P(15)=(15C15) (1/5)^15 (4/5)^(15-15)

P(15)=(15C15) (1/5)^15 (4/5)^0

15C15=15!/((15-15)!(15!))

15C15=15!/((0)!(15!))

15C15=1307674368000/((1)(1307674368000))

15C15=1307674368000/1307674368000

15C15=1

P(15)=(1) (0.2)^15 (0.8)^0

P(15)=(1)(3.277×〖10〗^(-13))(1)

P(15)=3.277×〖10〗^(-13)

Probability of answering at least 10 questions correctly will be

P(10) + P(11) + P(12) + P(13) +P(14) + P(15)

P (at least 10)=0.0001+0.000011+ 0.0000009542+0.00000005505+0.00000000197+ 3.277×〖10〗^(-13)

P (at least 10)=0.00011250667

Approximately

P (at least 10)=0.0001

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