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Irina18 [472]
2 years ago
9

Mr Lim put some red pens and blue pens into a box . The ratio of the number of red pens to the number of blue pens was 3: 4 .He

pet another 20 red pens into the box and the ratio of the number of red pens to the number of blue pens became 2:1 (a) How many red pens were there in the end? (b) How many blue pens were there?
Mathematics
1 answer:
gogolik [260]2 years ago
4 0

Answer:

a) There were 32 red pens and b) 16 blue pens.

Step-by-step explanation:

3:4

for 3:4 to be 2:1 we should add 5 in order for it to be 8:4 (2:1)

20 divided by 5 is equal to 4

8:4

8 times 4 is equal to 32

4 times 4 is equal to 16

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3 0
3 years ago
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A family has two cars during one particular week the first car consume 25 gallons of gas and the second consumed 15 gallons of g
d1i1m1o1n [39]

Answer: the efficiency of the first car is 25 miles per gallon.

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Let x represent the efficiency of the first car.

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Distance = car efficiency × number of gallons.

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4 0
3 years ago
Which quadratic equation has a vertex at (4, 2)?
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2 years ago
Each edge of a cube measures 8.9 cm.<br><br> What is the surface area of the cube?
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2 years ago
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H
Sav [38]

Answer:

What is the perimeter of a rectangle that is 18 inches wide and 23 inches long?

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Hope this helped! Have a great rest of your day! :)

5 0
2 years ago
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