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Zinaida [17]
3 years ago
8

7th grade math help me please :))

Mathematics
1 answer:
KatRina [158]3 years ago
7 0

Answer:

40

Step-by-step explanation:

s = 2;

h = 4

Surface area = 2s² + 4sh

                     = 2*2² + 4 * 2 * 4

                    = 2 *4 + 32

                    = 8 + 32

                  = 40 sq. units

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4х + Зу = 3<br> 4x - 2y = 18<br> How to solve this?
Brilliant_brown [7]

Using elimination, you can do

4x+3y-(4x-2y)=3-(18)

5y=-15

y=-3

Substitute it back into original equation:

4x+6=18

4x=12

x=3

<h2>So, the answer is <u><em>x=3, y=-3</em></u></h2>

5 0
3 years ago
Simplify i to the 37th power<br> A-1<br> B- -1<br> C- -i<br> D- i
Ivan
I believe the answer is D. Divide 37 by four and you get 9 remainder 1. I equals one.
Hope this helps mate.
Just remember that i to the fourth power is i.
4 0
3 years ago
I have most of A like the x&amp;y int and vertex I just need to know the equation in graphing form.
Serjik [45]

Step-by-step explanation:

a. y = 2x^2 + 4x + 2\\y = (2x^2 +4x) +2\\y= 2(x^2+2x) + 2\\y = 2(x^2 +2x +1) + 2 - 2\\y = 2(x+1)^2 + 0\\(h,k) = (-1,0)

b. y = -x^2 +2x\\y = -(x^2-2x)\\y = -(x^2-2x+1)+1 \\y = -(x-1)^2+1\\(h,k) = (1,1)

6 0
3 years ago
Pyramid A is a square pyramid with a base side length of 9 inches and a height of 10 inches. Pyramid B has a volume of 1,350 cub
Jet001 [13]

Answer:

500%

Step-by-step explanation:

We find the volume of pyramid A

Pyramid A is a square pyramid with a base side length of 9 inches and a height of 10 inches.

Volume = a² h/3

Where a = 9 in

h = 10 in

Volume = 9² × 10/3

Volume = 270 cubic inches

Pyramid B has a volume of 1,350 cubic inches.

Step 2

We compare both volumes

Pyramid A : Pyramid B

270: 1350

= 270/ 1350

= 1 /5

Hence, Pyramid B is 5 times bigthan ger pyramid A

In percent, it is the volume of Pyramid B 500% bigger than Pyramid A

8 0
3 years ago
Jessica gets her favorite shade of purple paint by mixing 1/3
strojnjashka [21]

Answer:

8 cups of blue and 12 cups of red

Step-by-step explanation:

Combine 1/3 c of blue + 1/2 c of red = 5/6 c of purple.

(5/6)x = 20

 

x = (6/5)20 = 24

this is applied to each of the above measurements to show that you need 8 c of blue + 12 c of red.

8 0
3 years ago
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