Answer:
77.5
Step-by-step explanation:
For 0.30 for the first 50, just subtract 50 from 175, that leaves 125.
(An easy way to do this is think of quarters, 25+25=50 and 50+25=75 so all you have to do is subtract two 25s and you know it's 125)
Put the 125 to the side, and multiply 50 to 0.30, you get 15.
Then for 0.50 over 50 containers, multiply the remaining 125 with 0.50, you get 62.5.
Add 62.5 and 15 together, that gives you 77.5
Answer:
156000
Step-by-step explanation:
We have 3 letters and the repetition is not allowed and we have 26 letters
26*25*24=15600
And 1 digit that has 10 option
15600*10=156000
Do you want us to do all seven? I don't think so.
17. s for Sonia, m for Sam, n for Nigel
s = 13.2 + 1.4 m
n = -10 + 2.5 m
n = 12 + s
First and third,
n = 12 + (13.2 + 1.4 m)
Second and that one,
-10 + 2.5m = 25.2 + 1.4m
1.1m = 35.2
m = 35.2/1.1
m = 32
Answer: 32 kg
18.
f - # of $500 tickets, t - $300 tickets, w - $200 tickets
t = 2f
w = -60 + t
500f + 300t + 200w = 48000
f = t/2
500(t/2) + 300t + 200(-60 + t) = 48000
750t = 60000
t = 80
w = -60 + t = 20
Answer: 20
19.
c + b = 171
c/9 = b/9 -5
c = b - 45
Adding,
2c + b = b + 126
c = 63
Answer: 63
Three's my limit.
To find all the combinations you need to solve this system of inequations:
8m + 12w ≤ 240
m ≥ 3
w ≥ 3
w ≥ 2m
The way to solve that system is by graphing each inequation in the same system of coordinates (m,w).
From the combinations listed, 6 men's shirts and 15 women's shirts is the only valid one.
8*6 + 12*15 = 228 ≤ 240
6 ≥ 3
15 ≥ 3
15 ≥ 2(6)
Then, the answer is option C. 6 men's shirts and 15 women's shirts
