Essential: Solve the proportions step by step
1 answer:
Answer:
The value of r=
The value of x=
Step-by-step explanation:
Given that,
A) 
Now,

8(2r-2)=9(7r+10)
16r-16=63r+90
-16-90=63r-16r
-(16+90)=47r
-106=47r
r=
B) 
Now,

5(x+5)=9[3(x-2)-1]
5x+25=9[3x-6-1]
5x+25=9[3x-7]
5x+25=27x-63
25+63=27x+5x
83=32x
x=
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Answer:
-66
Step-by-step explanation:
P(8) = -8^2 - 2
-64 -2 = -66
24+20=44
4(6+5)=44
the first one
15%=3
5%=1
5(20)=100
1(20)=20
So, there are 20 students in the class.
Just do length x width x height
The decimal of the fraction 2/7 is 0.2857142857