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lukranit [14]
2 years ago
10

In Jan's library, she has 24 informational books. If 15% of the books are informational text, how many total books are in her li

brary?
Mathematics
1 answer:
tatyana61 [14]2 years ago
6 0

Answer:

160 books

Step-by-step explanation:

To find the total amount of something, when given the percent and how much value the percent is, use this

Total = \frac{Number*100}{Percent}

This way we get:

Total = \frac{24*100}{15} = \frac{2400}{15} = 160

Hope this answer helped! :)

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A spinner has 20 total spaces that are either blue or red. The spinner is spun, and a die is rolled. If the probability of landi
juin [17]

Answer:

Step-by-step explanation:

Remark

We have to assume that the die is a cube.

We know that getting a 3, if the die is fair,  is 1 chance out of 6 = 1/6

We don't know how many blues there are on the spinner, but we do know that the number of them is over 20. So that's x/20

Now multiply the left side to get the combined probability. x/20 * 1/6. The result is 10.83/ 100

Solution

(x/20) * (1/6) = 10.83/100

x / 120 = 10.83/100                     Multiply both sides by 120

x = 10.83 * 120 / 100

x = 12.996 which is going to round to 13

The blue spaces = 13

6 0
3 years ago
The perimeter of triangle STU is 28.8 centimeters. Which is the perimeter of triangle JKL?
spayn [35]

Answer:

You forgot to add a picture and/or more context.

Step-by-step explanation:

6 0
3 years ago
What is the formula to a trapezoid
Molodets [167]
[(upper legth + lower length) x height] divided by 2
3 0
3 years ago
Point G is the centroid of the right △ABC with m∠C=90° and m∠B=30°. Find AG if CG=4 ft.
o-na [289]

Answer: \text{Length of AG=}\frac{2\sqrt{63}}{3}

Explanation:  

Please follow the diagram in attachment.  

As we know median from vertex C to hypotenuse is CM  

\therefore CM=\frac{1}{2}AB

We are given length of CG=4  

Median divide by centroid 2:1  

CG:GM=2:1  

Where, CG=4

\therefore GM=2 ft

Length of CM=4+2= 6 ft  

\therefore CM=\frac{1}{2}AB\Rightarrow AB=12

In \triangle ABC, \angle C=90^0

Using trigonometry ratio identities  

AC=AB\sin 30^0\Rightarrow AC=6 ft

BC=AB\cos 30^0\Rightarrow BC=6\sqrt{3} ft  

CN=\frac{1}{2}BC\Rightarrow CN=3\sqrt{3} ft

In \triangle CAN, \angle C=90^0  

Using pythagoreous theorem  

AN=\sqrt{6^2+(3\sqrt{3})^2\Rightarrow \sqrt{63}

Length of AG=2/3 AN

\text{Length of AG=}\frac{2\sqrt{63}}{3} ft


5 0
3 years ago
Tran jumped 162 times in 9 hours. At that rate, how many times would<br> she jump in 10 minutes?
yawa3891 [41]

Answer:

3

Step-by-step explanation:

you first need to convert 9 hours into minutes:

9*60=<u>5</u><u>4</u><u>0</u> minutes

162 jumps ---in--- 540 minutes

? jumps ---in--- 10 minutes

?= (10*162)/540

?= 3

7 0
2 years ago
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