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Zielflug [23.3K]
2 years ago
15

If x = 9 and y = -3, evaluate the following expression: = 6x - 8y ​

Mathematics
1 answer:
masha68 [24]2 years ago
8 0

Answer: 78

Step-by-step explanation:

Step 1:

Substitute the variables in:

6(9) - 8(-3)

Step 2:

Multiply to get rid of the parentheses:

54 - -24 = 54 + 24 (the two negatives cancel out)

Step 3:

Add, and then you're done:

54 + 24 = 78

hope this helps :)

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3 years ago
How do I solve this equation 1x - 15 = 5x + 13
madam [21]

Answer:

x = -7

Step-by-step explanation:

This is a multi-step equation in algebra. We are expected to isolate the given variable and find the constant value that it is equal to. In order to do this, we can follow some steps:

1x - 15 = 5x + 13 Subtract 5x on both sides of the equation.

-4x - 15 = 13 Add 15 to both sides of the equation.

-4x = 28 Divide by -4 on both sides of the equation.

x = -7

You can input this value and make sure that the answer is correct.

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4 0
3 years ago
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What is the solution to this system of equations?
kotykmax [81]

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D

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Encuentra en cada producto notable el error o errores,enciérralo y escribe el resultado correcto.
lbvjy [14]

Given:

The equation is:

(2x+3y)(2x-3y)=4x^2+6y^2

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The error in the given equation and correct it.

Solution:

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Taking left-hand side, we get

L.H.S.=(2x+3y)(2x-3y)

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