Bob spent 25% more time on his research project than he had planned. he had spent an extra h hours on the project. what expression could represent the number of hours bob actually spent on the project

Let the projected number of work hours be w.

Then the number of hours he actually worked was 1.25w.  This represents the number of hours that Bob actually spent on the project.

Another way in which to answer this would be as follows:

Actual work hours = w + h (h hours beyond the projected w work hours).

This w + h is equivalent to 1.25w.   This means that h = 0.25w.

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blogan.20174

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