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3 years ago

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Which of these is the algebraic expression for "nine less than some number?" Fraction 9 over k Fraction k over 9 9 − k k − 9. MI

DDLE

1 answer:

alexira [117]3 years ago

7 0

<h3>Answer: k - 9</h3>

We have some number k and we take 9 from it to end up with k-9, which represents 9 less than k.

For example, if k = 12, then k-9 = 12-9 = 3. So 3 is nine less than the number k = 12.

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(a+4)² - 3²<br> Factored out

uranmaximum [27]

Answer:

$a = - 7$

$a = - 1$

Step-by-step explanation:

$(a+4) {}^{2} - 3 {}^{2} \\ a {}^{2} + 8a + 16 - 9 \\ a {}^{2} + 8a + 7 \\ a {}^{2} + a + 7a + 7 \\ a(a + 1) + 7(a + 1) \\ (a + 7)(a + 1) \\ a + 7 = 0 \: \: \: \: or \: \: \: \: a + 1 = 0 \\ a = - 7 \: \: \: \: \: \: \: \: or \: \: \: a = - 1$

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3 years ago

Determine the slope and y-intercept of the graph:<br> 2x + 5y = 10

FinnZ [79.3K]

Slope is -2/5 and y-intercept is 2

Step-by-step explanation:

Step 1: Write the equation in slope-intercept form y = mx + b

2x + 5y = 10

5y = -2x + 10

y = -2/5 x + 10/5

y = -2/5 x + 2

Step 2: Find the slope and y-intercept from the equation.

Slope, m = -2/5

y-intercept, b = 2

6 0

3 years ago

Last month you went on three hikes. one hike was2 3/4 miles long one was 1 1/2 miles long and was 3 3/4 miles long. in decimal h

creativ13 [48]

2 3/4 = 2.75

1 1/2 = 1.5

3 3.4 = 3.75

2.75 + 1.5 + 3.75 = 8

You hiked 8 miles last month in total.

8 0

3 years ago

Read 2 more answers

Find the value of x.

Artemon [7]

I believe it is 83 because a straight line is 180 degrees

6 0

3 years ago

The left side of a solid block is held at a constant temperature of 200°C. The temperature profile within the block is given by

Nikitich [7]

Answer:

with T = 50⁰C, we have:

50 = 200 - 5x - x²

<=> x² + 5x = 150

<=> x² + 5x - 150 = 0

=> x = 10

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3 years ago