Plug in the numbers on the x axis (the ones in the x row) where the x in the problem is.
Since the x is right next to -10 you multiply the number you plug in by -10.
Then, subtract that from 4 and you have your answer!
Answer:
$100
Step-by-step explanation:
12x5=60
+40= $100
Answer:
84kg
Step-by-step explanation:
10*79.2kg=792kg the weight of the 10 people
3*68kg=204kg the weight of the 3 people who get out of the lift
792kg-204kg=<em>588kg the weight of the 7 people left in the lift</em>
so, the mean weight of the 7 people left in the lift=588kg:7=84 kg
1 roll of tape: 1.28/2=$0.64
2 notepads: .87/3=.29x2=$0.58
2 highlighters: 1.59x2=$3.18
2 pens: $1.98
.64+.58+3.18+1.98=$6.38
13% of what is 78
"what" is the unknown, so use x for what.
"of" in math usually means a multiplication.
"is" means "="
13% * x = 78
0.13x = 78
x = 78/0.13
x = 600
Answer: the number is 600