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2 years ago

Find the domain and range of the relation. {(3,-2) (2,1) (-1,0) (1,3)}

1 answer:

5 0

The domain of the inverse of a relation is the same as the range of the original relation. In other words, the y-values of the relation are the x-values of the inverse.

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What value of B makes the expression. x² + Bx + 81 a perfect square trinomial?

Oxana [17]

Answer:

B.) 18

Step-by-step explanation:

To find the correct b value we use this formula

b² - 4ac = 0

b = What we are solving for

a = 1

c = 81

b² - 4(1)(81) = 0

b² - 324 = 0

b² = 324

$b = \sqrt{324}$

b = ±18

And 18 is one of the answer choices

So B.) 18 is the correct answer.

4 0

3 years ago

Read 2 more answers

What interval notation represents the data graphed below?

Aliun [14]

Answer: Choice D

$(-\infty, -2) \cup [4, \infty)$

=====================================================

Explanation:

The left portion is the interval (-∞, -2)

This is a shorthand way of saying $-\infty < x < -2$

The curved parenthesis says "do not include this endpoint as part of the solution set". Note the open hole at x = -2 in the diagram.

In contrast, the value x = 4 is included (due to the filled in circle), so we use a square bracket for this endpoint. Therefore, the right-hand portion is represented by [4, ∞) which translates to $4 \le x < \infty$

Negative and positive infinity will always use a parenthesis, and never a square bracket. This is because we can only approach infinity but never reach it, so we cannot include it as an endpoint.

All of this builds up to the full interval notation to be $(-\infty, -2) \cup [4, \infty)$

The only square bracket is near the 4; everything else is a curved parenthesis. This is why choice D is the final answer.

6 0

3 years ago

What’s the length of the missing leg?!

posledela

So the right answer is 12 m.

Look at the attached picture

Hope it will help you..

-Pragya~~

8 0

3 years ago

Kyle went to soccer lessons. He was charged $23.75 for one session. He gave the instructor a 15% tip. How much did Kyle

saul85 [17]

Answer:

$3.563

Step-by-step explanation:

First, I multipled 23.75 times the 15% tip, which you would get 356.250. Then, divide that by 100 to get 3.563. I hope this helps :)

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2 years ago

There are 18 gallons of gas in a car at the

GREYUIT [131]

Answer:

18/2.5 = 7.2

Step-by-step explanation:

Since there are 18 gallons at the beginning of the trip you divide by 2.5 to find out how much gas is left after each hour.

7 0

2 years ago