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Orlov [11]
3 years ago
5

Use substitution to solve the linear system of equations.

Mathematics
1 answer:
Crazy boy [7]3 years ago
4 0

Answer:

(-2,-8)

Step-by-step explanation:

y=4x

3x+5y=-46

3x+5(4x)=-46

3x+20x=-46

23x=-46

x=-2

y=4(-2)

y=-8

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Solve the equation.<br><br> x2 − 6x − 7 = 0
zlopas [31]

Answer:

x = 7 and x = -1

Step-by-step explanation:

<u>Step 1:  Factor</u>

x^2 - 6x - 7 = 0

(x - 7)(x + 1) = 0

<u>Step 2:  Solve for x</u>

(x - 7)(x + 1) = 0

x - 7 = 0 and x + 1 = 0

x - 7 + 7 = 0 + 7 and x + 1 - 1 = 0 - 1

x = 7 and x = -1

Answer:  x = 7 and x = -1

8 0
3 years ago
-7x-4=13 how do u show the work and how do u check it
ioda

Answer:

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3 0
4 years ago
√m/3=4<br> My teacher didn't explain how to solve these to well can someone explain?
Andrews [41]
√m/3 = 4

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To remove the denominator of 3, multiply both sides by 3.
3 (m/3) = 3(16)
m = 48

To check: Substitute m by its value.
√m/3 = 4
√48/3 = 4
√16 = 4
4 = 4
4 0
3 years ago
A bacteria culture starts with 900 bacteria and doubles in size every half hour.
eduard
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4 years ago
She has 42 dogs all together. please help
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Answer:

she will have 22

Step-by-step explanation:

8 0
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