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OLEGan [10]
3 years ago
10

2x+y=-2 5x+3y=-8 system of equations using substitution

Mathematics
1 answer:
KonstantinChe [14]3 years ago
4 0

Answer:

Step-by-step explanation:

Tripple 2x+y=-2

6x + 3y = - 6 And 5x + 3y = -8

Subtract the second equation from the first to get

X = -14

Now that we have x, we need to determine y.

(2 x -14) + y = -2

-28 + y = -2

Hence, -28 + 2 = - 26

Now thats the difference, but because we are adding y to -28 to get -2, y has to be positive

Hence, y must be 26

X= -14, Y= 26

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ziro4ka [17]

Answer:

Step-by-step explanation:

The better buy is the one where you get more area of pizza per dollar (area/price).

Since the problem gives diameter, we assume the pizzas are circle-shaped.

Circle Area = pi x (radius)², and radius r = 1/2 of diameter d.

*************************************************************************************

Pizza 1: d = 8 and price is $10

r = 1/2 x d = 4

Area of Pizza 1 = πr² = π(4)² = 16π

*** area/price for Pizza 1 = 16π/$10 = 1.6π area per dollar

**********************************************************************************

Pizza 2: d = 14 and price is $16

r = 1/2 x d = 7

Area of Pizza 2 = πr² = π(7)² = 49π

*** area/price for Pizza 2 = 49π/16 = 3.0625π area per dollar

***********************************************************************************

Pizza 2 is the better buy, with more pizza per dollar.

3 0
4 years ago
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kolbaska11 [484]

Answer:

(5,11)

Step-by-step explanation:

c= 6+s

c=6+5

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Hope this helps! :)

3 0
3 years ago
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Mademuasel [1]
Yes this is correct using equaivslent angles formula in order to do
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3 years ago
88+(-39)<br> show how you got the answer please
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Answer:

49

Step-by-step explanation:

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