Question

i need help on plato <33333333333333 ( attachment below)

Answer 1

Just try some numbers, I tried 11 and 8, it worked: 11+8=19,11*8=88

Answer 2

Let l=length and w=width.

Since the width is half the length, we can say the length is twice the width. So,
\[l=2w\]
The area is 128, so
\[A=128=lw=2w(w)=2w^{2}\]
So \[2w^{2}=128\]
Divide by 2
\[w^{2}=64\]
Square root both sides
\[w=8\]
Since l=2w, l=16.

Answer 3

Same idea as the last one, except the first equation would be
l+w=18, or l=18-w

Plug this into your area function A=80=lw and solve the quadratic. :)

Answer 4

This is very similar to the last question, do what mtbender did: write down the equations and solve them.

Answer 5

so whats the answer? :(

Answer 6

Tell me what you get, and I will let you know if it's right. And if it's not, I'll help you find the mistake.

Answer 7

ok

Answer 8

8*10=80?

Answer 9

That's correct :)

Answer 10

what about this one?

Answer 11

You could do the last one, so you can do this one. Post the answer and I'll tell if it's correct.