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german
3 years ago
9

Solve using Substitution -2x+y=4 -5x+2y=1

Mathematics
1 answer:
slavikrds [6]3 years ago
7 0

Answer:

x=7

y=18

Step-by-step explanation:

y=2x+4

-5x+2(2x+4)=1

-5x+4x+8=1

-x=-7

x=7

-2(7)+y=4

-14+y=4

y=18

plz mark brainliest

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8(2y + ¼) =<br> sovle?!?!?!
Marina86 [1]

Answer:

16y+2

Step-by-step explanation:

8x2y=16y

8x1/4=2

4 0
3 years ago
2mn + 4n 2 and 5m 2 - 7mn
Katyanochek1 [597]
Answer: 5mn + 5m + 4n + 4

because

2mn - 7mn = 5mn

5m = 5m
stays the same

4n = 4n
stays the same

2 + 2 = 4

if you put them toghether than you get:

5mn + 5m + 4n + 4

is equal to

2mn + 4n + 2 and 5m + 2 -7mn
4 0
3 years ago
Classify the equation, 7x+6=7x-5, as having one solution, no solution, or infinitely many solutions.
Ksenya-84 [330]

Answer:

Step-by-step explanation:

7x + 6 = 7x - 5

Collecting like terms

7x - 7x = -5 - 6

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5 0
3 years ago
Make r the subject of the formula
zloy xaker [14]

Answer:

r=\frac{-a+p}{a+p}

Step-by-step explanation:

-pr+p=ar+a

-ar-pr+p=a

-ar-pr=a-p

r(-a-p)=a-p

r=\frac{-a+p}{a+p}

3 0
3 years ago
Read 2 more answers
The cube of the difference of a number and 4
lbvjy [14]

Answer:

(x - 4)³

Step-by-step explanation:

"The cube of x" would be x³.  The difference of a number and 4 would be x - 4.

Therefore, "the cube of the difference of a number and 4" would be

(x - 4)³

6 0
3 years ago
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