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kiruha [24]
3 years ago
9

What is the solution to the system of equations? Use the substitution method.

Mathematics
1 answer:
Sav [38]3 years ago
4 0
THE solution is D.


you have 7 and 3 so commom multiple is 21
y-3*7=7

y-21=7

y=21+7

y=28
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What is the y intercept of the equation of the line that is perpendicular to the line y=3/5x+10 and passes through the point (15
Mama L [17]
It's 20/3. hope it will help you!
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3 years ago
4. Which expression is a simplified form of -5(8x)?<br> a. 40x<br> b. -40%<br> C. 3x<br> d. -40x?
Sedbober [7]

Answer:

Option d

Step-by-step explanation:

-5(8x)

= -5×8×x

= -40x

Answered by GAUTHMATH

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3 years ago
Please help me understand this! Thanks a bunch if you help!
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Benjamin writes an expression for the sum of 1 cubed, 2 cubed, and 3 cubed -- What is the value of the expression? options---
saw5 [17]

Answer:

36

Step-by-step explanation:

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7 0
3 years ago
Need help ASAP!!!!!!
trapecia [35]

Answer:

see explanation

Step-by-step explanation:

x² + 3x + 7 = 5 ( subtract 5 from both sides )

x² + 3x + 2 = 0 ← in standard form

(x + 2)(x + 1) = 0 ← in factored form

Equate each factor to zero and solve for x ( zero product rule )

x + 2 = 0 → x = - 2

x + 1 = 0 ⇒ x = - 1

--------------------------------------------------------------

x² - 2 = - 2x² + 5x ( subtract - 2x² + 5x from both sides )

3x² - 5x - 2 = 0 ← in standard form

(3x + 1)(x - 2) = 0 ← in factored form

Equate each factor to zero and solve for x

3x + 1 = 0 ⇒ 3x = - 1 ⇒ x = - \frac{1}{3}

x - 2 = 0 ⇒ x = 2

------------------------------------------------------------

(x + 3)² + 4x = 0 ← expand left side using FOIL and simplify

x² + 6x + 9 + 4x = 0

x² + 10x + 9 = 0 ← in standard form

(x + 9)(x + 1) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 9 = 0 ⇒ x = - 9

x + 1 = 0 ⇒ x = - 1

4 0
3 years ago
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