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Thepotemich [5.8K]
3 years ago
5

Y=x-7 Y=-4x-2 Solve by substitution help please

Mathematics
2 answers:
wlad13 [49]3 years ago
6 0

Answer:

(1, - 6 )

Step-by-step explanation:

Given the 2 equations

y = x - 7 → (1)

y = - 4x - 2 → (2)

Substitute y = x - 7 into (2)

x - 7 = - 4x - 2 ( add 4x to both sides )

5x - 7 = - 2 ( add 7 to both sides )

5x = 5 ( divide both sides by 5 )

x = 1

Substitute x = 1 into either of the 2 equations for corresponding value of y

Substituting x = 1 into (1)

y = 1 - 7 = - 6

Solution is (1, - 6 )

sergeinik [125]3 years ago
4 0

Answer:

6= 7-1

-14= -4·3-2

Step-by-step explanation:

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3 years ago
If x an integer and 2x +8 <22 and 3x >9, how many possible values of x are there?
koban [17]

Answer:

3 values

Step-by-step explanation:

2x +8 <22 and 3x >9

Solve the two inequalities separately and then put them back together

2x +8 <22

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Divide by 2

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Then solve the second inequality

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Divide by 3

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Putting them back together

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4,5,6  are possible choices

3 values

5 0
3 years ago
Read 2 more answers
(2.5×10-8)(9×10-10)​
IgorC [24]

Answer:

1360

Step-by-step explanation:

First, you do all the operations inside the parenthesis, and then you multiply the two. Also, remember the order of operations. Multiplication always comes before addition and subtraction.

(2.5x10-8)(9x10-10)

(25 - 8)(90 - 10)

(17)(80) = 17x80 = 1360

4 0
3 years ago
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