MATHEMATICS HIGH SCHOOL

if 30 cents outof every 1 dollar goes to taxes and the rest is net income, what's the ratio of taxes to net income?

Answers

Answer 1
Answer: So if 30 cents out of every dollar go to taxes, then the net income is 70 cents out of every dollar. So the ratio of taxes to net income is 30:70 (30 cents taxes to 70 cents net income) which is 3:7
Answer 2
Answer:

the ratio would be 30:70

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Which can be represented by the expression 17 – 2x?

-7 - 7 ( 8x - 7 ) = - 19 + 5x

Answers

-7 - 7( 8x - 7 ) = -19 + 5x
⇔ -56x + 49 = -12 + 5x
⇔ -61x = -61
⇔ x = 1

If a sequence is defined recursively by f(0)=2 and f(n+1)=-2f(n)+3 for n is greater than or equal to 0, then f(2) is equal to...?

Answers

We start with f(0) = 2, we can use this value to find out the next value f(1) in our relation.

 f(1) = -2 f(0)+3 = -2(2) + 3 =- 4 +3 =-1 Now we know f(1) we can work out f(2):

f(2) = -2 f(1)+3 = -2( -1)+3 = 2 +3 = 5.

So f(2) = 5

List three multiples of 9.

Answers

Three multiples of 9 are :9,18,27,36. They are mutiples of 9 because their digits sum is nine and  all are exact number of 9 too.

A bag had 3 pink marbles and 4 purple marbles find the probability of selecting 3 pink marbles without replacement

Answers

There are 7 marbles in the bag.
The probability of drawing a  pink one is (3/7) .

Then you have 1 pink one, and there are 6 marbles in the bag.
The probability of drawing a pink one is (2/6) .

Then you have 2 pink ones, and there are 5 marbles in the bag.
The probability of drawing a pink one is (1/5) .

The probability of all 3 draws being successful is

           (3/7) (2/6) (1/5)  =  6/210  =  1/35  =  about  2.86%  (rounded)

How do i round 186.282?

Answers


Well, first you need to decide what place you want to round it TO.

Example:  Round it to the nearest hundredth:

The next larger hundredth is  186.29 .
The next smaller hundredth is  186.28 .
Now look at it.
186.282  is closer to  186.28  than it is to  186.29 .
So the nearest hundredth is  186.28 .

-- When  186.282  is rounded to the nearest hundredth, it becomes  186.28 .

Similarly . . .
-- When  186.282  is rounded to the nearest tenth, it becomes  186.3 .
-- When  186.282  is rounded to the nearest whole number, it becomes  186 .
-- When  186.282  is rounded to the nearest ten, it becomes  190 .
-- When  186.282  is rounded to the nearest hundred, it becomes  200 .
-- When  186.282  is rounded to the nearest thousand or anything larger,
                                                                                       it becomes  zero.

I'm curious . . . where did this number come from ?

It happens to be one thousandth of the speed of light, in miles per hour.

Did it come up in science class, or did a science geek use it for
one of the problems in math ?
Okay so if you want to know how to Round all you have to remember is 4 or more add 1 more 4 or less just ignore.

If your rounding 186.282 in the tenths you would look in your tenths place and look at the number in the left. ( the number in the tenths place is 8)

So is 2 greater or lesser than 4?

its lesser.


so ignore the rest of the two numbers there ( 8 & 2)

And your answer would be 186.2

5.567 round hundredths

Answers

5.57 because 5 is the tenths 6 is hundredths 7 is thousandths
556.7, I am really good at decimals and fractions, just mainly math, science, literature, and some Economics
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