Answer:
9 + 5b
Step-by-step explanation:
Extending answers to be able to send.
All three numbers have to have a equal multiple.
If the mean height of 15 girls is 1.65m, the sum of the girls’ heights is 15×1.65=24.75m.
If the mean height of 10 boys is x metres, the sum of the boys’ heights is 10x m.
The sum of all 25 srudents’ heights is 25×1.682=42.05m.
Therefore, 24.75+10x=42.05, x=(42.05-24.75)/10=1.73m, the mean height of the boys.
Answer:
x=-11
Step-by-step explanation:
12-4(x+2)=48
Subtract 12 from each side
12-12-4(x+2)=48-12
-4(x+2)=36
Divide by -4
-4(x+2)/-4=36/-4
x+2 = -9
Subtract 2
x+2-2 = -9-2
x=-11
