Answer:
x= 14
y= 5
Step-by-step explanation:
3x+23+25=90 3x=90-48 x=14
3(14)+23+5y= 90 65+5y=90 y= 5
ANSWER
A) 7
EXPLANATION
The given triangles are similar
Hence the corresponding sides are in the same proportion.

Simplify the right hand side:

Cross multiply;
6(3x+4)=5×30
Expand
18x+24=180
18x=150-24
18x=126

Answer:
20
Step-by-step explanation:

R = 5(CA - 0.3)
<span>Multiply everything in the parenthesis by 5.</span>
R = 5CA - 1.5
Add 1.5 to both sides
1.5 + R = 5CA
Divide 5A on both sides.
C = 1.5 + R / 5A
Hope this helps!
Surface area= 2(6x15)+2(7x15)+2(6x7)
=180+210+84
=474m
Volume=15x6x7
=630m^2