Answer:
Hey there!
You could find the volume of the hole, and subtract it from the volume of the rectangular prism.
Hope this helps :)
You can use a simultaneous equation - x + 7y=24 minus x-9y= -24 you end up with 16y = 48
Divide 48 by 16 and you get 3 is equal to y. Now put three into an equation eg, x + 21 = 24 it is now obvious that x = 3 as well as y = 3
Hi
7 = 14.70
15= X
so : X = 15*14.70 /7 = 31.5
15 liters of petrol cost 31.5
Answer:
28:4=7
7×7=49
Step-by-step explanation:
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Hello from MrBillDoesMath!
Answer: 1/3 (or 33 1/3 %) and 42 teachers
Discussion:
Part 1. If 16 out of 24 students made at least 80%, then 24 - 16 or 8 students made less than 80%.
Students who scored less than 80% / total number of students =
8/24 = 1/3
Part 2.
3 teachers for every 57 students so
3/57 = t/798 where t is the number of teachers
Multiply both sides by 798:
3/57 * 798 = t =>
3/57 * (14 * 57) = t as 798 = 14 * 57 so cancelling the 57's.
3* 14 =t
or t = 42
Thank you,
MrB