Answer:
100 students play only basketball.
Step-by-step explanation:
We are given the following information in the question:
Total number of students in school = 240
Number of students that play soccer =
n(S) =80
Formula:
Putting the values, we get,
Thus, 144 students play basketball.
Out of these 144, 44 plays soccer as well.
Thus, 100 students play only basketball and not soccer.
15 postcards, 10
envelopes, and a notepad cost------------------- 1.68 dolars
Postcards------------x
Envelopes------------y
Notepad--------------z
15x+10y+z=1.68
<span>Y=z/8 y=0.02+x</span>
<span>Z=8y x=y-0.02</span>
15(y-0.02)+10y+8y=1.68
15y-0.30+18y=1.68
<span>33y=1.98 y=0.06</span>
Z=8*0.06=0.48
X=0.06-0.02=0.04
Costs
Postcards------------0.04
dolars/ 4 cents
Envelopes------------0.06
dolars/ 6 cents
<span>Notepad--------------0.48
dolars/ 48 cents</span>
Answer:
The more expensive book cost $90, the other two combined cost $60.
Step-by-step explanation:
x = cost of more expensive book
y = subtotal cost of the other books
x = 50% more than y, so x = 1.50y = 1.5y
x + y = total cost = $150
1.5y + y = 150
y = 150/2.5 = 60
x = 1.5y = 1.5(60) = 90
1 is the answer b/c that's the only number it goes too
Answer:
x = -1/4
Step-by-step explanation:
= 1/3
= 
4x = -1
x = -1/4
