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3 years ago

Plsssss help anyone!!!!!!!!!!!!!!!

Mathematics

2 answers:

Ksju [112]3 years ago

7 0

Answer:

Well, I kind of know this but I don't wanna be wrong so here and the sides if it helps

1. 2x8x8

2.2x8x8

3. 8x8x10x10

anzhelika [568]3 years ago

6 0

Answer:

I think this is the answer

Section 1 area is 16, section 2 is 16, and section 3 is 80, the whole area of the trapezoid is 140

Hope it helps

Step-by-step explanation:

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Mariulka [41]

I do not know because i’m not good at math

3 0

3 years ago

Kathy is fencing in her yard that has an area of 800 square feet. Her yard is in the shape of a rectangle where the length is 60

anygoal [31]

Answer:

The dimensions of the yard are W=20ft and L=40ft.

Step-by-step explanation:

Let be:

W: width of the yard.

L:length.

Now, we can write the equation of that relates length and width:

$L=5W-60$ (Equation #1)

The area of the yard can be expressed as (using equation #1 into #2):

$Area=W*L=W*(5W-60)$ (Equation #2)

Since the Area of the yard is $800 ft^2$ , then equation #2 turns into:

$800=W*(5W-60)$

Now, we rearrange this equation:

$800=W*(5W-60)//800=5W^2-60W//5W^2-60W-800=0$

We can divide the equation by 5 :

$W^2-12W-160=0$

We need to find the solution for this quadratic. Let's find the factors of 160 that multiplied yields -160 and added yields -12. Let's choose -20 and 8, since $(-20)*8=160$ and $-20+8=-12$ . The equation factorised looks like this:

$(W-20)(W+8)=0$

Therefore the possible solutions are W=20 and W=-8. We discard W=-8 since width must be a positive number. To find the length, we substitute the value of W in equation #1:

$5*20-60=40$