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Dmitriy789 [7]
3 years ago
6

PLS HELP if x - 2y = 1 and 2x - y = -4, then x + y =

Mathematics
1 answer:
IRISSAK [1]3 years ago
6 0

Answer:

-5

Step-by-step explanation:

x-2y=1

(-3)-2(-2)=1

(-3)+(4)=1

x = -3, y = -2

-3 + -2 = x + y = -5

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A triangle has a perimeter of 48 feet. If the three sides of the triangle are n, 4n−2, and 4n−4, what is the length of each side
alexdok [17]

Answer:

6; 22; 20 (ft.)

Step-by-step explanation:

1) if the length of the each side are: n; 4n-2 and 4n-4, then the expression of the perimeter can be written: P=n+4n-2+4n-4 or P=9n-6.

2) if according to the condition perimeter is 48 (ft.), then

9n-6=P; ⇔ 9n-6=48; n=6.

3) if n=6, then the required lengths of the sides are:

n=6 (ft.);

4n-2=22 (ft.);

4n-4=20 (ft.)

3 0
2 years ago
if a population of 100 cells triples every hour, which function represents p(t), the population after t hours?
-BARSIC- [3]
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5 0
2 years ago
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Fantom [35]

Answer:

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Step-by-step explanation:

It is given that each grid unit is equal to 3 inches. SO we have to use this scale.

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7 0
2 years ago
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dybincka [34]

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Step-by-step explanation:

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Hoped this helped

8 0
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Answer:

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2 years ago
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