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3 years ago

Describe the proportion method for solving a percentage problem:

Mathematics

1 answer:

kvasek [131]3 years ago

8 0

EXPLANATION 

First you will need TWO numbers. One being the percentage and the other being the number your trying to find the percent out of.

EXAMPLE

Imagine you have 130 crayons. Out of the 130 crayons you found that 15% of them were broken.

First you want too take the 15% and put it over 100, because a percentage always goes over 100. Now that you have the 15/100 you now wanna take the 130 crayons and put the variable X over it. Now that you have the fractions 15/100 and X/130 you want to cross multiply them to get 100x and 1950. For the final step your going to want to take 1950 and divide it by 100 to get your answer, 19.5.

I hope this helped you find out the method for solving a percentage problem while using proportions.

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H function is even, odd, or neither. b. g(x) = x² - 2 Is it odd or even

o-na [289]

$g(x) = x^2 - 2 \text{ is even function }$

Solution:

Given that,

$g(x) = x^2 - 2$

We have to find whether the above function is odd or even

If a function is: y = f(x)

If f(-x) = f(x), the function is even

If f(-x) = - f(x), the function is odd

Which is,

$\mathrm{Even\:Function:\:\:A\:function\:is\:even\:if\:}f\left(-x\right)=f\left(x\right)\mathrm{\:for\:all\:}x\in \mathbb{R}\\\\\mathrm{Odd\:Function:\:\:A\:function\:is\:odd\:if\:}f\left(-x\right)=-f\left(x\right)\mathrm{\:for\:all\:}x\in \mathbb{R}$

From given,

$g(x) = x^2 - 2$

Replace x with -x

$g(-x) = (-x)^2 - 2\\\\g(-x) = x^2 - 2$

Therefore,

$g(x) = g(-x)$

Thus the function g(x) is even

4 0

3 years ago

Raju and Johari baked 143 muffins altogether. Andrew and Johari baked 211 muffins altogether. (b) If Andrew baked 113 muffins, h

n200080 [17]

Answer:

467 muffins

Step-by-step explanation:

143 + 211 + 113 = 467

8 0

3 years ago

Simplify (6 5x) (7x 3)

antiseptic1488 [7]

(6 + 5x)(7x + 3) = 42x + 18 + 35x^2 + 15x = 35x^2 + 57x + 18

3 0

3 years ago

Mr.gilliam is 3 years younger than his wife.the sum of their ages is 95.how old is mr.gilliam

Usimov [2.4K]

X = the age of Mr. Gilliam
His wife is 3 years older, so the age of Mr. Gilliam's wife = x+3
The sum of their ages is 95.

$x+x+3=95 \\
2x+3=95 \\
2x=95-3 \\
2x=92 \\
x=46$

Mr. Gilliam is 46 years old.

3 0

3 years ago

Read 2 more answers

Find the volume of a cylinder with a radius of 4 in and a height that is 3 times the radius

german

Answer:

Volume of a cylinder: V = π * r² * h ,

Base surface area of a cylinder: A_b = 2 * π * r² ,

Lateral surface area of a cylinder: A_l = 2 * π * r * h ,

Total surface area of a cylinder: A = A_b + A_l ,

Step-by-step explanation:

So, when the radius is tripled, the volume will be 3 squared = 9 times than the previous one.