Answer:
42cm
Step-by-step explanation:
3:7
width:length
18cm width(7cm length/3cm width)=42cm length
10 of the math problems is 40%
40/4 = 10%
10/4 = 2.5 questions
10% = 2.5 questions
10% x 10 = 100%
2.5 questions x 10 = 25 questions
25 questions is the answer
So, we know the slope of the original equation is 4. So the perpendicular slope is the negative reciprocal, so it's -1/4. Then, the points have to be -3, 7. So when we plug that into our equation, we get

<span>V=L*H(A+B)/2 i think the answer is 103.5</span>
2y=2x+5
Y=(2x+5)/2
For y=0
x=-5/2
For x=0
y=5/2