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Mars2501 [29]
3 years ago
15

Which system of equations is equivalent to the following system? (5 points) 2x + 4y = 14 4x + y = 20

Mathematics
1 answer:
fredd [130]3 years ago
3 0

Answer:

a.

Step-by-step explanation:

4x+y=20 multiplied by (-4) gives you -16x-4y=-80

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The length of the rectangle is 8cm longer than the width.
l=w+8
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p=76=((l+6)+(w+3))*2=(l+6+w+3)*2=(l+w+9)*2

to solve this substitute l=w+8 into the p= equation:
p=76=((w+8)+w+9)*2=
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l=w+8=10.5+8=18.5
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zubka84 [21]

Step-by-step explanation:

Hey there!

Given;

= 2 {x}^{2}  - 2x - 40

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<u>= 2 {x}^{2}  - 2x - 40</u>

<u>= 2 {x}^{2}  - (10 - 8)x - 40</u>

<u>= 2 {x}^{2}  - 10x + 8x - 40</u>

<u>Take</u><u> </u><u>common</u><u> </u><u>and</u><u> </u><u>simplify</u><u> </u><u>them to get </u><u>answer</u><u>. </u>

<u>2x(x - 5) + 8(x - 5)</u>

<u>= (2x + 8)(x - 5)</u>

<u>= 2(x + 4)(x - 5)</u>

<u>Therefore the</u><u> </u><u>answer</u><u> </u><u>is</u><u> </u><u>option </u><u>D</u><u>.</u>

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4 years ago
-21+2(3-15)-(-3)(+7)+(-3)(-8)​
Alexxx [7]

Answer:

- 21 + 2(3 - 15) - ( - 3)( + 7) + ( - 3)( - 8) \\  =  - 21 - 24 + 21 + 24 \\  = 0

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she will fit 4 1/6

Step-by-step explanation:

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