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Gemiola [76]
3 years ago
11

If 9% of a number equals 10, find 90% of that number.

Mathematics
1 answer:
Levart [38]3 years ago
5 0

Answer:

100

Step-by-step explanation:

In this problem 10 represents 9% of a number. So, to find 90% you must multiply 10 by 10. You do this because 9% times 10 equals 90%; therefore, 100 must be 90%.

This can also be proven through cross multiplication. To set up a proportion put the percent over the number like, \frac{9}{10}=\frac{90}{x}. Then cross multiply to get the equation, 9x=900. Finally, divide both sides to get x=100.

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Quick algebra 1 question for 10 points!
zaharov [31]

<u>Answer:</u>

○ x = -7

<u>Step-by-step explanation:</u>

Given the equation:

10(x + 10) - 4 = 11 - 5(2x + 11),

to solve for x, we have to rearrange the equation to make x its subject.

10(x + 10) - 4 = 11 - 5(2x + 11)

⇒ 10x + 100 - 4 = 11 - 10x -55      [expand brackets]

⇒ 10x + 96 = -44 - 10x

⇒ 10x + 10x + 96 = -44                   [add 10x to both sides]

⇒ 20x + 96 = -44

⇒ 20x = -44 - 96                             [subtract 96 from both sides]

⇒ 20x = -140

⇒ x = \frac{-140}{20}                                        [divide both sides by 20]

⇒ x = \bf-7

6 0
2 years ago
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Olin [163]

Answer:

126

Step-by-step explanation:

14 times 9

7 0
3 years ago
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Does 30, 40, 45 make a right triangle?
mr Goodwill [35]

Answer:

no these degrees do not make a right triangle

4 0
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The sum of 3 consecutive even numbers is 66. write an equation and solve to find the smallest even number.
Alekssandra [29.7K]
X+(x+2)+(x+4)= 66
3x+6=66
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3 years ago
given the vector v has an initial point (-2,-6) and a terminal point of (1,2) write vector v as a linear combination of the stan
Anuta_ua [19.1K]

Answer:

v=3i+8j

Step-by-step explanation:

The given the vector v has an initial point (-2,-6) and a terminal point of (1,2).

To find the components of vector v, we subtract the terminal points from the initial point to obtain.

v=<1,2>-<-2,-6>

v=<1--2,2--6>

v=<1+2,2+6>

v=<3,8>

As a linear combination of the standard unit vectors.

v=3i+8j

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