To learn more about water evaporation, you measure the depth of a puddle after a rain storm. Your 1 st measurement was taken 3 hours after the storm, was 2.25 in. You take another measurement an hour later to determine that the rate of evaporation of the puddle is 0.25 in. per hour. Write a linear equation in the slope-intercept form that models the depth of the puddle. Estimate the depth of the puddle 7 hours after the storm.

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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answer: group b.

step-by-step explanation:

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct