It works because 7 x 9 x 10 is the same thing as 7 x 90, since 9 x 10 is just 90. So basically he is just writing more but the answer will still be the same.
Answer:
3.07
Step-by-step explanation:
(86.0/(4.0+24.0))
Circumference/diameter= 47.1/15=3.14
Answer:
6
Step-by-step explanation:
it would be six in one hour he would clean 2 houses in two 4 houses then in three it would be six
Answer:
y= 20
Step-by-step explanation:
y=2*5x
Let x =2
y = 2*5 (2)
y = 10*2
y= 20
