Answer:
c.
Step-by-step explanation:
You can either do this on the calculator, or in your head. As its a larger number, it is worth doing it on the calculator.
413/14= 29.5
The alternative method is to list all of the tens multiples, and the smaller multiples when you're getting close to the answer, and this will be able to help you.
14x10= 140
14x20=280
14x30= 420 (which is slightly too big)
14x29= 406 (slightly too small)
14x29.5= 413
Hope this helps :)
Answer:
4
I multiplyed them all by two and then added them to see f it equaled 12 and it did
Answer:
x=10/c
Step-by-step explanation:
3(cx-7)=9
(cx-7)=3
cx=10
x=10/c
The amount the sister earns =x
The amount I earn = 2x
The amount the friend earns = 4x
4x + 2x + x = 210
7x = 210
x=30
Amount the sister earns = 30
Amount I earn = 2(30) = 60
Amount the friend earns = 4(30) = 120
