Answer:
5)7:8=180
84:96=180
6)4:5=90
40:50=90
7)a). q=135
p=45
b).a=70
b=110
supplementary angle=sum of two angle 180°
complementary angle=sum of two angle 90°
Answer:
w = 9r - g/ t
Step-by-step explanation:
subtract g
divide t
x+y=23
x-y=5
First, add the equations.
2x=28
x=14
Then...
14+y=23
y=9
Therefore the answer is...
x=14 y=9
Hello again!
Answer is 60%
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so, for this one you first figure out how many study French.
2/9 of 270 is 60 (simple method: 1/9 is 270 divided by 9, which is 30. So 2/9 is 1/9 multiplied by 2, which is 60).
60 are doing French.
Then use this in the ratio of French to Spanish (3:7) and you have 3 and 60 on the same side. You have to multiply 3 by 20 to get to 60 (or divide 60 by 20 to get 3).
So the number you use to do the same to the other side of the ratio is 20.
7 multiplied by 20 (or 7 multiplied by 10, then multiply that by 2) to get 140.
140 are doing Spanish.
Then take the French and Spanish from the big total and you get 270-140-60=70
70 are doing German.
Of these 70, 42 are boys. 70-42 gives 28 girls. 42/70 is the fraction of boys doing German. This is the same as 6/10 and to get a percentage you multiply the fraction by 10 so that the bottom of it is out of 100 (so that’s 60/100).
And 60/100 is the same as 60%.
So your answer is 60%
