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rodikova [14]
3 years ago
13

Find each percent increase or decrease to the nearest percent:

Mathematics
1 answer:
Svet_ta [14]3 years ago
4 0
From 10 to 15 -> 10 increased with half its size (5), that means increase of 50%
From 16 to 12 -> decrease of 4, which is a quarter of 16, that means a decrease of 25%
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Trahn purchased a pair of slacks for $39.95 and a jacket for $64. The sales tax rate on his purchases was 5.5%. Find the total c
Lelu [443]
$64 + #39.95= $103.95
103.95/100*5.5=5.71725
103.95+5.71725=109.66725
                           approximately equal to $109.67
7 0
3 years ago
In 2000, the number of students enrolled at Arlington Country Day School was 823 students. In 2010, the population was approxima
LekaFEV [45]
B 14.3% decrease

To find the percentage change in the number of students enrolled you do : 705 ( which is the new number ) - 823 ( which is the old number ) / 823 then the result *100
So I know it is confusing, sorry for that,
but basically what you do is (new value - old value) / old value then the result of this multiplied by 100 since it is a percentage
Toodles!!!
4 0
3 years ago
Consider this equation. Cos(0) = 8/9 if 0 is an angle in quadrant IV, what is the value of tan(0)? I
Vinvika [58]

Answer:

\displaystyle \tan(\theta)=-\frac{\sqrt{17}}{8}

Step-by-step explanation:

We are given that:

\displaystyle \cos(\theta)=\frac{8}{9}

Where θ is in QIV.

And we want to find the value of tan(θ).

Recall that cosine is the ratio of the adjacent side over the hypotenuse.

Therefore, the opposite side is:

o=\sqrt{9^2-8^2}=\sqrt{17}

Next, in QIV, only cosine is positive: sine and tangent are both negative.

Tangent is the ratio of the opposite side to the adjacent. So:

\displaystyle \tan(\theta)=\frac{\text{opposite}}{\text{adjacent}}

Substitute. Tangent is negative in QIV. Hence:

\displaystyle \tan(\theta)=-\frac{\sqrt{17}}{8}

3 0
3 years ago
What is the greatest common factor of 8 and 36
prohojiy [21]

Answer:

4

Step-by-step explanation:

The greatest common factor of 8 and 36 is 4.

Hope this helps!

8 0
3 years ago
Why do you think adding and subtracting polynomial expressions is like adding and subtracting
seropon [69]

Answer:

Polynomials are <em>closed</em> under addition and subtraction, which is fancy mathspeak that means that whenever we add or subtract two polynomials, we <em>always</em> get another polynomial. In that way, they behave a lot like the numbers you're probably already familiar with. Adding and subtracting:

  • Two integers gives you another integer
  • Two rational numbers gives you another rational number
  • Two real numbers gives you another real number

And it works the same with polynomials!

7 0
3 years ago
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