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3 years ago

15

A carpenter from one town charges $35.00 an hour for building a porch. A carpenter from the next town charges $32.75 an hour. Wh

at is the percent decrease in the hourly rates?
Help please

1 answer:

DochEvi [55]3 years ago

8 0

Percent Decrease=old -new/old *100
35-32.73/35*100
2.25/35*100
0.064*100
6.4%

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The temperature is 16 degrees F in the morning and drops to -15 degrees F in the evening what is the difference between these te

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16 - (-15) = 16 + 15 = 31...difference of 31 degrees

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Part A: If (7^2)^x = 1, what is the value of x? Explain your answer. (10 points)

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Which points lie on the line whose equation is 8x - 2y + 7 = -9? Select all that apply.

Anestetic [448]

Answer:

A.(-2, 0)

C. (-1.4)

Step-by-step explanation:

we know that

If a point lie on the line, then the point must satisfy the equation of the line (makes the equation true)

we have

$8x-2y+7=-9$

subtract 7 both sides

$8x-2y=-9-7$

$8x-2y=-16$

divide by 2 both sides

$4x-y=-8$

Substitute the value of x and the value of y of each point in the linear equation and analyze the result

<u><em>Verify each point</em></u>

case A) we have

(-2, 0)

For x=-2, y=0

substitute

$4(-2)-(0)=-8$

$-8=-8$ ---> is true

so

the point lie on the line

case B) we have

(1, 3)

For x=1, y=3

substitute

$4(1)-(3)=-8$

$1=-8$ ---> is not true

so

the point not lie on the line

case C) we have

(-1, 4)

For x=-1, y=4

substitute

$4(-1)-(4)=-8$

$-8=-8$ ---> is true

so

the point lie on the line

case D) we have

(1, -4)

For x=1, y=-4

substitute

$4(1)-(-4)=-8$

$8=-8$ ---> is not true

so

the point not lie on the line

case E) we have

(0, -1)

For x=0, y=-1

substitute

$4(0)-(-1)=-8$

$1=-8$ ---> is not true

so

the point not lie on the line

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