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Nina [5.8K]
3 years ago
13

Solve each of the following system of equations by substitution!!! x-5y=-49 y=-2x+1

Mathematics
1 answer:
saul85 [17]3 years ago
8 0

Answer:

(-4,9)

Step-by-step explanation:

substitute the given value for y into the first equation

x-5(-2x+1)=-49

distribute

x+10x-5=-49

add like terms

11x-5=-49

add 5 to both sides

11x=-44

divide both sides by 11

x=-4

now plug x into into the second equation

y=-2(-4)+1

y=8+1

add like terms

y=9

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Sam complete 3 math problems in 8 minutes. How long will it take to do 15 problems?
pochemuha

Answer:

40 minutes

Step-by-step explanation:

 Math Problems                   3              15

 ----------------------                  -----     =    ------

       Minutes                          8              x

                                             3x = 15 * 8

                                               x = 15 * 8 / 3

                                               x = 120 / 3

                                               x = 40

                                                  40 Minutes

8 0
3 years ago
When the polynomial 4x^4 − 13x^2 − 2x is divided by the polynomial x − 2 , x-2, what is the remainder?
zhenek [66]
Let p (x) = 4x^4-13x^2-2x
The zero of x-2 is 2
putting x = 2 in p (x), we get,
p (2) = 4×2^4-13×2^2-2×2
= 64 - 52 - 4
= 64 - 56
= 8
Therefore, remainder = 8
3 0
3 years ago
Help me with this please
Keith_Richards [23]

Answer: $5.00 is the range

Step-by-step explanation: Range is the largest number subtracted by the smallest, so $6 - $1 is $5.

3 0
2 years ago
I need help, can someone please explain this step by step.
Helga [31]

180-117.3=62.7

answer is 62.7

3 0
3 years ago
WILL MARK BRAINLIST
Elanso [62]

Answer:

slope= 10/9

y intercept= -11/9

Step-by-step explanation:

9y= 10x -11

y= 10/9x -11/9

slope= 10/9

y intercept= -11/9

4 0
3 years ago
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