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UNO [17]
4 years ago
11

Idk this i need answer (4+r)4=8

Mathematics
1 answer:
Kitty [74]4 years ago
3 0
(4+r)4=8

16 + 4r = 8

4r = -8 

 r = -2

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What is the solution set of [1/x-2]<-2
slavikrds [6]

Step-by-step explanation:

1 \div (x - 2) + 2  < 0

(1 + 2x - 4) \div ( x- 2) < 0

(2x - 3)  \div (x - 2) < 0

Hence

You have to put:

2x  - 3 > 0

And

x - 2 > 0

Which results in:

x > 3 \div 2

And

x > 2

The solution is:

3 \div 2 < x < 2

7 0
3 years ago
Two sides of an equilateral triangle have lengths x+2 and -2x+20 Which could be the length of the third side: 14-x or 2x+4?
just olya [345]
An equilateral triangle has 3 equal sides by definition.

so we know that x+2 = -2x+20 because we're told that those are both lengths of the triangle's sides. let's solve for x.

x+2 = -2x + 20
add 2x to both sides.
3x + 2 = 20
subtract 2 from both sides.
3x = 18
divide both sides by 3.
x = 6

now, let's find the length of the sides. plug 6 into one side, which is x+2.
6+2 = 8. so each side's length must be equal to 8. let's just check to make sure we didn't make a mistake. if this is correct, then -2x + 20 should also = 8.

-2(6) + 20
-12 + 20
8.

so we know that the sides = 8. let's see if 14 - x or 2x+4 are equal to 8 when we plug in 6 for x.

14 - 6 = 8. so 14-x could be a length for a side.

2(6) + 4 = 12 + 4 = 16. so 2x + 4 can not be a length for a side.

the answer is 14 - x only, or C.

3 0
4 years ago
A product costs $58.50 for 7 pounds. How much does it cost per ounce?
belka [17]
16 ounces = 1 pound.
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7 0
4 years ago
Read 2 more answers
Melissa is 9 years old. How old will she be in x years?
solniwko [45]

Answer:

Taking that you didn't provide any other information about the values of x..

The only plausible answer, which probably isn't your case but still can be valid out of context is 19.

Step-by-step explanation:

"X" is 10 in Roman numbers.

9 + 10 = 19

(But I suppose that you had more details to the question that you didn't yet share :) )

OR.. the answer might be an algebraic expression..

<u><em>"9+x" years old.</em></u>

6 0
4 years ago
Read 2 more answers
PLEASE HELP ASAP. 6th grade. 20 POINTS PLEASE HELP!!!!!!<br><br> Answers: -1,-2, -1/2, 2.
Murrr4er [49]

Answer:

The slope is -2.

Step-by-step explanation:

Slope formula:

\displaystyle \frac{y_2-y_1}{x_2-x_1}

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\displaystyle\frac{1-3}{1-0}=\frac{-2}{1}=-2

Therefore, the slope is -2, and the correct answer is -2.

Hope this helps!

8 0
3 years ago
Read 2 more answers
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