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3 years ago

Question 1

Mathematics

1 answer:

wlad13 [49]3 years ago

7 0

You can draw vertical line, and get 2 rectangles.
1) First one with sides 2 and 7.
2) Second one with sides 1 and (5-2) = 3, 1 and 3.

3) Area of the first one =2*7=14 units²
4)Area of the second one = 1*3=3 units²

5) Area of the whole polygon = 14+3=17 units²

Answer C. 17units².

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Does this graph represent a function? Why or why not?

RoseWind [281]

Answer:

Step-by-step explanation:

There are no two points on the same line so the answer is D

I hope this is right!

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3 years ago

Introduction to Functions: Unit Test

Greeley [361]

Multiples of 8 that are less than 60: 8,16,24,32,40,48,56,
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3 years ago

Read 2 more answers

From 1994 to 1995 the sales of a book decreased by 80%. If the sales in 1996 for the same as in 1994, By what percent did the in

zheka24 [161]

Answer:

400%

Step-by-step explanation:

Let the sales be "100" in 1994

Since, it decreased 80%, the sales was:

80% = 80/100 = 0.8

0.8 * 100 = 80 (decreased by 80)

So, it was

Sales in 1995: 100 - 80 = 20

Sales in 1996 was same as in 1994, so that's 100

Thus,

Sales in 1994: 100

Sales in 1995: 20

Sales in 1996: 100

We need to find percentage increase form 1995 to 1996, that is what percentage increase is from 20 to 100?

We will use the formula:

$\frac{New-Old}{Old}*100$

Where

New is 100

Old is 20

SO, we have:

$\frac{New-Old}{Old}*100\\=\frac{100-20}{20}*100\\=4*100\\=400$

So, it increased by 400%

3 0

3 years ago

Evaluate exactly in radians: arctan(1/sqrt(3)).

Alexeev081 [22]

$\displaystyle \\ 
 \frac{1}{ \sqrt{3} } = \frac{\sqrt{3}}{ \sqrt{3} \times \sqrt{3}} = \frac{\sqrt{3}}{ 3} \\ \\ 
\arctan\left(\frac{\sqrt{3}}{ 3} \right) = \arctan(\tan 30^o) = \boxed{30^o}$

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2 years ago

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Aleksandr [31]

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8 0

2 years ago