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VLD [36.1K]
3 years ago
15

Plsssss help 30 POINTS

Mathematics
2 answers:
Olegator [25]3 years ago
7 0
2(7)+2(2)=18

just adding all sides
Finger [1]3 years ago
4 0

Answer:

perimeter is the outside, 7+7+2+2= 18

Step-by-step explanation:

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For the solution (x,y) to the system of equations what is the value of x- y? 7x+3y=8 6x-3y=5
stiv31 [10]

Answer:

  2/3

Step-by-step explanation:

Let's  define z = x-y, so solving for z will tell us exactly what we want to know. Then we can substitute for x: x = z+y, and our equations become ...

  7(z+y)+3y = 8   ⇒  7z +10y = 8

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We can eliminate the y-variable by subtracting 3 times the first equation from 10 times the second:

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  60z +30y -21z -30y = 50 -24 . . . . eliminate parentheses

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The value of x - y is 2/3.

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The attached graph shows (x, y) = (1, 1/3), so x - y = 1 - 1/3 = 2/3.

4 0
3 years ago
Shining Star Preschool purchased a van for $38,000. Suppose MACRS allows vans to be depreciated fully in 6 years according to si
musickatia [10]

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Step-by-step explanation:

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135*2+120*2=
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6 0
3 years ago
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3x-11=22
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