Answer:
Step-by-step explanation:
1.
Ratio = 400 : 500
2.
Ratio = 300 : 700
3.
Ratio = 75 : 125
4.
Ratio = 280 : 320
13.
Ratio = 70 : 30 : 20
14.
Ratio = 125 : 150 : 175
15.
Ratio = 125 : 200 : 225
16.
Ratio = 1.98 : 4.62 : 7.26
Hope this helps. - M
The value 600 is 30 times as much as 20
<h3>Ratio and proportion</h3>
Ratio are written in terms of fractions. The expression 600 is how many times as much as 20 can be written as;
600 = x *20
where x is the required value or factor
20x = 600
Divide both sides by 20
20x/20 = 600/20
x = 30
Hence the value 600 is 30 times as much as 20
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Answer:
x=-11
y=-1
Step-by-step explanation:
x=4y-7
2x+9y=-31
2(4y-7)+9y=-31
8y-14+9y=-31
17=-31+14
17y=-17
y=-1
x=4(-1)-7
x=-11