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Dahasolnce [82]
3 years ago
8

Antonio planned to read 15 books over the summer for the library's summer reading challenge. At the end of July he has read 4/5

of the books. How many books has he read?
Mathematics
1 answer:
gavmur [86]3 years ago
6 0

Answer:

12\ books

Step-by-step explanation:

Number of books=15

He read \frac{4}{5} of the total books.

Books\ he\ read\ at\ the\ end\ of\ July &=\frac{4}{5}\times total\ number\ of\ books\\=\frac{4}{5}\times 15=4\times 3=12

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A triangle has an angle that measures 90°. What type of triangle could it be? (Choose all that apply)
OLEGan [10]

Right and scalene. A right triangle has an angle that measures to be 90° and using the pythagorean theorem, we know that the triangle is scalene, meaning that all three sides have different side lengths. (:

3² + 4² = 5²

4 0
3 years ago
Read 2 more answers
Find the rectangular coordinates of the point ( -3, 1/2 π)
alexdok [17]

Answer:

x = -3 cos (\frac{\pi}{2})= 0

y = -3 sin (\frac{\pi}{2})= -3

And then the rectangular coordinates for this case are :

(x = 0 , y = -3)

Step-by-step explanation:

We have the following point given P = (-3, \frac{\pi}{2}) and we want to conver from polar to rectangular coordinates and we need to use the following formulas:

x = r cos \theta

y = r sin \theta

For this case we have that:

r = -3

And:

\theta = \frac{\pi}{2}

Replacing we got:

x = -3 cos (\frac{\pi}{2})= 0

y = -3 sin (\frac{\pi}{2})= -3

And then the rectangular coordinates for this case are :

(x = 0 , y = -3)

4 0
3 years ago
Show how Carly can work out 171/2% of 240 in her head
KATRIN_1 [288]

17 ½ % of 240

First option

Change  the fraction ½ to a decimal. It would be 0.5 ( 1 divided by 2)

½=0.5

You will add the whole number 17 to the result.

17 + 05 = 17.5

Now you will divide by 100 (percent)

17.5 /100  To divide a decimal by 100,  move the decimal point two places to the left.

17.5 /100 = 0.175   times 240

0.175 x 240 = 42

Second option

Change the percent to an improper fraction

17 ½= 35/2 (you have to multiply (2 x 17) plus 1 equals 35 over 2 ( keep the denominator). It will be 35/2.  Put the other number (240) over 100 and multiply.

35/2 x 240/100 = 42

There is another way . You can simplify

Cancel all the zeros that you have and start to reduce.

            6

7       12

35 x 24<span> 0   </span> =  42

2       10 0

 1          5

           1

17 ½ % of 240  =  42

5 0
3 years ago
Which way does a column go
Neko [114]
A column is going from top to bottom

4 0
3 years ago
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Use substitution to find the solution to the system of equations.
mote1985 [20]

Answer:

Ummm, so the answer is A. (-3,-2)

StepByStep Solution:

5x + 7(x+1) =-29

5x+7x+7=-29

12x=-36

x=-3

y=-3+1

y=-2

4 0
3 years ago
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