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STatiana [176]
3 years ago
7

Solve the following sysyem of equations by the substitution method.  5x+y=8 3×+y=8

Mathematics
1 answer:
meriva3 years ago
6 0
5x+y=8\\
3x+y=8\\\\
y=-5x+8\\
3x+y=8\\\\
3x-5x+8=8\\
-2x=0\\
x=0\\\\
y=-5\cdot0+8\\
y=8\\\\
\boxed{(x,y)=(0,8)}
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A satellite television company charges a one-time installation fee and a monthly service charge. The total cost is modeled by th
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3 years ago
Explain commutative property of integers under subtraction​
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Answer:

The commutative property states that the numbers on which we operate can be moved or swapped from their position without making any difference to the answer. The property holds for Addition and Multiplication, but not for subtraction and division. Addition. Subtraction.

Step-by-step explanation:

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3 0
3 years ago
If Y varies directly with X solve the following :
BARSIC [14]

Answer:

a) x = -270

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Step-by-step explanation:

y varies directly with x so y = kx

a)

y = kx

k = y/x

k = 10/-30 = -1/3

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y = -1/3 x

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90 = -1/3 x

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b)

k = y/x

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So

y = 38/9 x

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y = 304/9 or y = 33.78

c)

k = y/x

k = -4.3 / 12.9

k = - 1/3

So

y = -1/3 x

If y = 12.6 then

12.6 = -1/3 x

x = 12.6 *(-3)

x = -37.8

5 0
3 years ago
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