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3 years ago

If you add 20% of a number to the number itself what percent of the result would you have to subtract

Mathematics

1 answer:

Alina [70]3 years ago

5 0

N+ 0.2n = 1.2nn = (1.2n) - (1/6)*(1.2n)
1/6 = 16.667%

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Suppose you are traveling straight from Los Angeles, California to Albuquerque, New Mexico, stopping overnight in Flagstaff, Ari

Roman55 [17]

D. L.A. to Flagstaff, 465 miles; Flagstaff to Albuquerque, 345 miles

The answer above is correct.

810 - 120 = 690 ; 690 / 2 = 345 mi ( Flagstaff to Albuquerque )

810 - 345 = 465 mi ( L.A. to Flagstaff )

3 0

3 years ago

Solve using the elimination method: X-3y=7 3x + 3y=9

sergij07 [2.7K]

Answer:

$x=4\\\\y=-1$

Step-by-step explanation:

Given Equation:

$x-3y=7$ Equation:1

$3x + 3y=9$ Equation:2

Dividing Equation:2 by '3' both the sides:

$x+y=3$

or $x=3-y$ Equation:3

Putting the vale of 'x' in Equation:1

$x-3y=7$

$(3-y)-3y=7\\\\3-y-3y=7\\\\3-4y=7\\\\$

Subtracting '3' both sides

$-4y=7-3\\\\-4y=4$

$y=\frac{4}{-4}$

$y=-1$

Putting value of 'y' in Equation:3

$x=3-y$

$x=3-(-1)\\\\x=3+1\\\\x=4$

The solution of the equations is :

$x=4\\\\y=-1$

7 0

3 years ago

3/4h-9=1/4h-1 i need help

Vlada [557]

Answer I got for this was 16.

Subtract the 1/4 from the 3/4 and get 2/4, simplified: 1/2

You should have 1/2 h -9 = -1 by now,
Then add nine to the other side, getting 8.
You should have 1/2 h = 8.
Then divide 1/2 by 8.
8/1÷1/2 ---> 8/1 × 2/1 (you flip the fraction when you divide)
So your answer is 16!
Hopefully that helped!

4 0

3 years ago

Explain how to isolate the variable in the equation -2/3n + 7 = 15

vodka [1.7K]

Answer:

n = -12

Step-by-step explanation:

(-2/3)n + 7 = 15

(-2/3)n+7-7 = 15-7 Subtract by 7 on both sides

(-2/3)n = 8 Multiply by the reciprocal of the fraction, which is

(-2/3)n*(-3/2) = 8(-3/2) This makes it so you get n *1 and isolates n.

n = -24/2 = -12

7 0

3 years ago

The volume of a tennis ball is 8 cubic inches. What is the radius?

aleksklad [387]

24 is the correct answer:)

4 0

3 years ago