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3 years ago

Five less than one third of a number is two more than half of the same number. Find the number.

2 answers:

8 0

5 less (-5) than 1/3 of number (n/3) is (=) 2 more than (2+) half of the number (n/2)

-5+n/3=2+n/2
add 5 to both sides
n/3=n/2+7
times 6 both sides
2n=3n+42
minus 2n both sides
0=n+42
minus 42 boh sides
-42=n

the number is -42

the number is 18

Mila [183]3 years ago

4 0

X/3 - 5 = 2 + x/2
solve for x
x = -42

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2 years ago

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Step-by-step explanation:

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2 years ago

Read 2 more answers

What is the x value such that y =15 - 3x and y = 0? Please explain how you got this answer.

ICE Princess25 [194]

Answer:

x=5

Step-by-step explanation:

So how i came about to get this answer, was

y=15-3x

y=15-3(5)

y=15-15

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I found five by testing out different numbers for x such as 1 2 3 4, but when i got to five, that was where i got the answer, as shown above.

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3 years ago

After being dropped a certain ball always bounces back to 2/5 of the height of its previous bounceAfter the first bounce it reac

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Answer:

8 inches.

Step-by-step explanation:

In the first bounce, the height that the ball reaches was 125 inches.

If the ball always bounces back to $\frac{2}{5}$ of the height, then after 2nd bounce it will reach $(125 \times \frac{2}{5}) = 50$ inches height.

Again, after 3rd bounce, it will reach $(50 \times \frac{2}{5}) = 20$ inches height.

And, after 4th bounce, it will reach $(20 \times \frac{2}{5}) = 8$ inches height. (Answer)

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3 years ago