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3 years ago

For which values of x does each expression make sense? √(-2x)^2

Mathematics

1 answer:

timofeeve [1]3 years ago

4 0

If we put the value of X as 0 we will get the answer zero, So I guess the value of X as 0 will make sense.

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10% of what number is 78?

Zepler [3.9K]

Answer: x = 780

Step-by-step explanation: Well percent means over 100 so we can set up an equation for this problem by reading it from left to right.

So we know that 10% means 10/100, of means times, what number means x, is means equals, and 12 means 12.

Notice that 10/100 can be reduced to 1/10.

So rewriting our problem we have X/10 = 78.

To get rid of the fraction, we multiply both sides of the equation by 10 and we have x = 780. So, 10% of 780 is 78.

Now let's check our answer back in the original problem to see if it makes sense.

We have 10% of 780 is 78. Well we know that 100% of of 780 would be 780 so 10% of 780 should be alot less than 780 so 78 seems to make sense.

Image provided showing my work.

5 0

3 years ago

Read 2 more answers

Solve f - 6 = 3f + 1

LUCKY_DIMON [66]

Simplifying f + -6 = 3f + 1 Reorder the terms: -6 + f = 3f + 1 Reorder the terms: -6 + f = 1 + 3f Solving -6 + f = 1 + 3f Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-3f' to each side of the equation. -6 + f + -3f = 1 + 3f + -3f Combine like terms: f + -3f = -2f -6 + -2f = 1 + 3f + -3f Combine like terms: 3f + -3f = 0 -6 + -2f = 1 + 0 -6 + -2f = 1 Add '6' to each side of the equation. -6 + 6 + -2f = 1 + 6 Combine like terms: -6 + 6 = 0 0 + -2f = 1 + 6 -2f = 1 + 6 Combine like terms: 1 + 6 = 7 -2f = 7 Divide each side by '-2'. f = -3.5 Simplifying f = -3.5

7 0

4 years ago

Read 2 more answers

2y to the power of 2x - 3xz = ?

MrRissso [65]

Answer:

x•(2xy-3z)

Step-by-step explanation:

2x²y -3xz== x(2xy-3z)

6 0

4 years ago

Twenty four students in Jamal class are wearing tennis shoes. There are thirty students in his class. Jamal

stepladder [879]

Answer:

No, because 70% of a class of 30 students would be 21, not 24

Step-by-step explanation:

4 0

3 years ago

Sophia and Olivia shared 60p so that Olivia had 10p more than Sophia. How much did Sophia have?

Taya2010 [7]

Answer:

Step-by-step explanation:

If Olivia had 10 more p than Sophia, then Olivia has 35, and Sophia has 25.

35 + 25 = 60!

3 0

3 years ago