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4 years ago

14

Which expression is an equivalent expression of 12x + 10 + 4y?

1 answer:

galina1969 [7]4 years ago

4 0

Is there an answer key?

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25 x 52 x 78<br> 103 x x 5

Orlov [11]

Answer:

the answer will be 52221000

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4 years ago

I need to solve for y in -19 = y + 6

olga2289 [7]

Your answer is y=-25

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3 years ago

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Jimmy pays $2.93 for each gallon of gas. Which table best represents the relationship between g, the number of gallons purchased

Varvara68 [4.7K]

1 gallon = 2.93
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Therefore the correct table is D.

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3 years ago

Simplify the following expression:<br><br> 3b+5-9b-9+6b

galina1969 [7]

Answer:

3(3+2b)

or

2b +9

Step-by-step explanation:

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3 years ago

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How many solutions does the system have? You can use the interactive graph below to find the answer. 4x-2y=8 2x+y=2 4x−2y=8 2x+y

Tju [1.3M]

Answer:

Step-by-step explanation:

We have the following system

$\left[\begin{matrix} 4 & -2 \\ 2 & 1 \end{matrix}\right]x =\left[\begin{matrix} 8 \\ 2 \end{matrix}\right]$

The number of solutions depend on the determinant of the matrix of the system. If the determinant is different from 0, then it has one unique solution, if it 0 then it has infinite solutions.

Note that the determinant of a matrix

$\left[\begin{matrix} a & b \\ c & d \end{matrix}\right]$ is ad-bc. So in our case we have 4*1-(-2)*2 = 8 which is not 0. Then the system has an unique solution.

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3 years ago