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3 years ago

12x=4(x-5) then x equals?

2 answers:

8 0

12x=4(x-5)

distributive property to get rid of parenthesis 12x=4x-20

subtract x from one side to get the variable on one side 8x=-20

divide 8 by -20

x=-2.5

Brrunno [24]3 years ago

8 0

Simplifying 12x = 4(x + 5) Reorder the terms: 12x = 4(5 + x) 12x = (5 * 4 + x * 4) 12x =

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lisa goes to school for 7 hours per day works 3 hours per day and sleeps 8 hours per day. what is the ratio of hours lisa works

frozen [14]

Answer:

ratio of hours lisa works to hours lisa sleeps= 3:8

Step-by-step explanation:

lisa goes to school for 7 hours per day lisa works 3 hours per day

Lisa sleeps 8 hours per day.

For the ratio of hours lisa works to hours lisa sleeps

ratio of hours lisa works to hours lisa sleeps= hours Lisa works/hours Lisa sleeps

ratio of hours lisa works to hours lisa sleeps= 3/8

ratio of hours lisa works to hours lisa sleeps= 3:8

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3 years ago

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Ratling [72]

Answer:

x = 10, y ≈ 11.2

Step-by-step explanation:

Hi there,

We can find the length x first since we are given the lengths of the other two sides of the bottom right triangle. In order to find the length of x, it is important to know the Pythagorean Theorem and the fact that x is the hypotenuse.

$a^{2}$ + $b^{2}$ = $c^{2}$ ← Pythagorean Theorem

To find x:

$6^{2}$ + $8^{2}$ = $c^{2}$

100 = $c^{2}$

c = 10

Therefore, the value of x is 10.

To find y:

We now know the length of two sides of the upper right triangle. The value of y can be found by using the theorem again.

$a^{2}$ + $10^{2}$ = $15^{2}$

$a^{2}$ + 100 = 225

$a^{2}$ = 125

a = $\sqrt{125}$

a = 11.2 when rounded to the nearest tenth.

Therefore, the value of y is approximately 11.2.

Hope this explanation is useful. Cheers.

3 0

3 years ago

What is the sum of the coefficients in the expression below? 22°y2 + 5x+ y2 - 6xy' +7

schepotkina [342]

Answer:

485y to the power 2 + 5x to the power 2 - 6xy to the power 3 + 7

Step-by-step explanation:

I hope this helps. Also, there's this free app called Quick Math. If you need the steps, you should check there first, and maybe you should try that for other math problems as well.

Good luck and have a great rest of your day.

8 0

3 years ago

What is 130000000000000000 x 2345

ArbitrLikvidat [17]

3.0485e+18. That is the answer

6 0

3 years ago

Read 2 more answers

Determine whether 5, 238 is divisible by 2, 3, 4, 5, 6, 9, or 10.

Gelneren [198K]

Answer:

2, 3, 6

Step-by-step explanation:

Simply try each value using long division.

Since 5,238 ends in an even number, that automatically means it is divisible by 2.

5238/2=2619

Now for 3:

5238/3=1746 no remainder or decimal, so 3 also works

You can either do long division again with 4, or you can see if 5238 divided by 2 (5238/2) is also divisible by 2. Since 2619 doesn't end in an even number, 4 is a no go.

Long division 5238/4=1309.5 decimal here, so 4 isn't an answer

This is also very easy, simply check if the number ends in 0 or 5. Since 5,238 does not, 5 doesn't work either.

You can do the same thing as with 4, except this time trying to find if 5238 divided by 3 (5238/3) is divisible by 2. Since 1746 ends in an even number, 6 also works.

Long division: 5238/6=873

You can do the same thing as with 6, except this time trying to find if 5238 divided by 3 (5238/3) is divisible by 3.

1746/3=548 with a remainder of 2, which means 9 doesn't work

Long division: 5238/9=548.66 repeating

10:

Finally, 10 is another easy one. Simply check if the number ends in 0. 5,238 does not, so 10 doesn't work.

5 0

2 years ago