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Pachacha [2.7K]
3 years ago
8

Carlos has a 45% of his books if his bug has board 480 pages how many pages has he read

Mathematics
1 answer:
ella [17]3 years ago
7 0
You need to make a proportion.

45 X
------ -----
100 480

45 x 408 is 21600 ÷ 100 is 216.

so ur answer is 216

hope that helps
You might be interested in
Do all digits in number 333 have the same value
postnew [5]
No. the first 3 is 300, the second 3 is 30, and the third 3 is 3
6 0
1 year ago
Read 2 more answers
A piece of string of length 85 cm is divided into three pieces in the ratio 2 : 3 : 5. Calculate the length of the
Galina-37 [17]

Answer:

a=2/10 x85

=17cm

b.3/10 x 85

=25.5cm

c.5/10 x 85

=42.5cm

the shortest piece is 17cm

Step-by-step explanation:

8 0
3 years ago
Find the least common denominator of 7/20 and 3/28
Genrish500 [490]

Answer:

140

Step-by-step explanation:

We have been given two fractions \frac{7}{20} and \frac{3}{28}. We are asked to find the least common denominator of both fractions.

To find the least common denominator of both fractions, we will find least common multiple of 20 and 28.

Prime factorization of 20: 2\times 2\times 5

Prime factorization of 28: 2\times 2\times 7

Least common multiple of 20 and 28 would be: 2\times 2\times 7\times 5=140.

Therefore, the least common denominator of both fractions would be 140.

7 0
2 years ago
Twice a number plus twice a second number is 310. The difference between the numbers is 55
agasfer [191]

Answer:

x = 105

y = 50

Step-by-step explanation:

To solve this, try writing it out as an equation/expression first.

When you do, you should get something like this:

2x + 2y = 310

x - y = 55

This is a system of equations. To solve this, we're going to multiply the second equation [x - y = 55] by 2.

2(x - y = 55) = 2x - 2y = 110

Now, subtract your new equation from the first one [2x + 2y = 310]

2x + 2y = 310

-2x + 2y = -110

//<em>If you</em>'<em>re wondering why I changed the signs of the new equation, I multiplied our new equation [2x - 2y = 110] by -1 since we're subtracting//</em>

When you're done subtracting, the "2x" and "-2x" cancel out, so you're left with:

4y = 200

Now, simply solve for "y" by dividing both sides by 4.

4y = 200

y = 50

Now that we know y's value, substitute it into one of our original equations to solve for x.

//<em>I'm gonna plug y into the second equation [x - y = 55] just because it's easier, but you can plug it into the first one as well and get the same answer//</em>

When we plug it in, we get:

x - (50) = 55

To solve for "x," we must get rid of "-50." To do this, add 50 to both sides.

x - 50 = 55

x = 105

<u>So, x = 105 and y = 50</u>

4 0
3 years ago
FIRST ONE TO ANSER WILL BE MARKED BRAINLIEST!!
FromTheMoon [43]
Ok so
-10, -6
4,-6
-3,-13
-3,1
should be it
7 0
3 years ago
Read 2 more answers
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