I found the answer to 5, but I couldn't see the rest of worksheet to solve 6 thoroughly.
Both of these problems can be solved through substitution using the variables that you know equal a number.
For example #5: 5(3)(3)-7(3)+4
45-21= 24, and 24+8=28
That is how you solve number 5 and can also solve 6 the same way using the same method.
Answer:mj,bhvb n
mnbnmb mbnmbnb
Step-by-step explanation:
12×10+15y=390
120+15y=390
15y=270
y=18
So 18 adult t-shirts were sold
Answer:
Step-by-step explanation:
Step-by-step explanation:
Familiarize yourself with perfect squares in the neighborhood of 140:
10^2 = 100
11^2 = 121
12^2 = 144
Note that 140 is much closer to the perfect square than it is to the perfect square 121. The value of √140 must lie closer to 12 than to 11.
Place a point on the number line about 3/4 of the way from 11 to 12.
7n+5=5n+25 subtract 5n from both sides
2n+5=25 subtract 5 from both sides
2n=20 divide both sides by 2
n=10
