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SVETLANKA909090 [29]
3 years ago
10

Ms. Johnson has a box of 60 red and black pens on the shelf. If the ratio of red to black pens is 2 to 3, how many red pens does

she have?
Mathematics
2 answers:
Elena-2011 [213]3 years ago
8 0
Red to Black.
2 to 3.
For every 2 red we have 3 black so
For 4 red we have 6 black and so on..
Notice that
For every 2+3=5 pens we have 2 red ones
If we divide the total number of pens 60 into groups of 5 we will get 60 /5= 12 groups.
12 groups •2 red pens=24 red pens
Ksivusya [100]3 years ago
5 0
40 red pens I believe
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Answer:

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Step-by-step explanation:

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6 0
3 years ago
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2p + 3x = 680 x = 2p
svlad2 [7]
Use substitution. 

2p + 3(2p) = 680
2p + 6p = 680
8p = 680
p = 85

Plug in.
x = 2p
x = 2(85)
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3 0
2 years ago
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BabaBlast [244]

Answer:

Below.

Step-by-step explanation:

I'll do number 20, 21, 22 for you.

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21.   Reflected over the x-axis and down 4.

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3 years ago
The world's smallest plane has a length of 12 feet and the world's longest plane has a length of 302 feet. Write an absolute val
iren [92.7K]

An absolute value equation which could represent the length of a plane is : 12 feets ≥ x ≤ 302 feets

Smallest length of a plane = 12 feets

Longest length of a plane = 302 feets

This means that the minimum length of a plane cannot be below 12 feets and the maximum length of a plane cannot be above 302 feets

Using x as the length of a plane :

To represent as an absolute value ; we use inequality :

Minimum length ≥ x ≤ maximum length

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8 0
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9x - y = 45 solve for y
Lyrx [107]
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