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zvonat [6]
3 years ago
5

Which of these numbers is in the solution set of x + 5 = 15? A. 10 B. 3 C. 20 D. 11

Mathematics
2 answers:
stealth61 [152]3 years ago
6 0

Answer:

A

Step-by-step explanation:

10 + 5 = 15

Alik [6]3 years ago
3 0

Answer: A

Step-by-step explanation:

x+5=15

  -5  -5

x=10

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2 years ago
PLEASEEEE ANSWER ASAP
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Answer:

x = -1, x = 1

Step-by-step explanation:

Factor the equation. (It's a difference of squares, so we know the form will be (a-b)(a+b).)

y = x^{2} - 1\\y = (x-1)(x+1)

Test this by FOILing it out, if you're unsure. This is something it can be good to memorize!

Set it equal to 0.

0 = (x+1)(x-1)

Separate the two parenthetical expressions by the Zero Product Property.

0 = x+1\\0 = x-1

Solve for x!

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3 years ago
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dmitriy555 [2]

Answer:

A. -4

Step-by-step explanation:

Slope is rise over run, or y2-y1 / x2-x1.

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<u>The slope is A. -4.</u>

Let's see--does that make sense? A slope of four would be pretty steep, and that matches the graph. It also should be negative because the line goes down and to the right, not up and to the right, so -4 makes sense!

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