Answer:
40 gallons of water and 140 gallons premium antifreeze
Step-by-step explanation:
Let p represent the number of gallons of premium antifreeze in the mix. Then 180-p is the number gallons of water. The amount of pure antifreeze in the mix is then ...
0.90p + 0·(180 -p) = 0.70·180
p = 0.70·180/0.90 = 140 . . . . divide by the coefficient of p
180-p = 40 . . . . . find the water content
40 gallons of water and 140 gallons of premium antifreeze are in the mix.
Answer: 13
Explanation: 13 = prime
30 = composite
49 = composite
65 = composite
87 = composite
Answer:
10
Step-by-step explanation:
First add: (All the classes)
24+26+28= 78 students
Then divide: (Total students by students per teacher)
78/6= 13
Then subtract: (Adult needed minus teachers)
13- 3=10
Hope this helps! :)
<h3>The answer is
<u>
-200, -300, -450, -675</u>
i just got this question so uhh yea hope this helps in a way to anyone or someone. ^^</h3>