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3 years ago

9

A given line has the equation 10x + 2y = −2.

2 answers:

Cerrena [4.2K]3 years ago

6 0

I think is
y = ( ______)x + 12

y = -5x + 12

sergij07 [2.7K]3 years ago

5 0

Firstly, let's convert 10x + 2y = -2 to slope-intercept form (y = mx + b):

10x + 2y = -2
2y = -10x - 2
y = -5x - 2/5

The slope is -5. Parallel lines have the same slope; the question provides the y-int (12), so our equation is:

y = -5x + 12

Hope this helps.

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Denise has taken four math tests this semester and

Viefleur [7K]

Answer:

93

Step-by-step explanation:

Setup an equation. Add the 5 tests together, the unknown test will be represented by x, Since there are 5 tests total, you will divide by 5. to find the average.

$\frac{89 + 85+96+87+x}{5} = 90$

To solve first multiply both side by 5.

$(5) \frac{89 + 85+96+87+x}{5} = 90 (5)$

$89 + 85+96+87+x = 450$

Add the left side and then solve for x

$357 + x = 450$

Subtract 357 from both sides

357 - 357 + x = 450 - 357

x = 93

The last test has to be a score of 93 to get an average of 90.

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