Mara spent 1 1/2 on science homework. this is 2/3 of the time she had spent on her homework. how much time did she spend on her homework?

5/6 hours

2 1/6 hours

2 1/4 hours

4/9 hours

Good evening ,

Step-by-step explanation:

1 1/2 = 2/2 + 1/2 = 3/2

let t represent the time she spent On her homework

3/2 = 2/3(t) then t= 3/2×3/2 = 9/4 = 2 1/4.

:)

The correct answer is C. 2 1/4 hours.

Step-by-step explanation:

1. Let's review all the information provided for answering the question properly:

Time Mara spent on her science homework = 1 1/2 hours

Science homework = 2/3 of the total time on her homework

Time Mara spent on her homework = x

2. For calculating the total time Mara spent on her homework, we make this calculation using the Rule of Three Simple:

x = (1 1/2)/2/3

x = 3/2 / 2/3 (1 1/2 = 3/2)

x = 3/2 / 2/3

x = 3/2 * 3/2 = 9/4

x = 9/4 = 2 1/4

x = 2 1/4 hours

if x = 1, then the answer is 3.5

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204