You have to divide 28 by two, then times the answer (14) by five, making it 70
Answer:
Step-by-step explanation:
Answer:
Brian: 22
Charlie: 88
Latoya: 14
Step-by-step explanation:
Set up an equation where b represents the number of messages Brian sent:
4b will represent Charlie because he sent 4 times more texts than Brian did
(b - 8) represents Latoya because they sent 8 less texts than Brian:
b + 4b + (b - 8) = 124
Add like terms:
6b - 8 = 124
6b = 132
b = 22
Now, we can plug in 22 as b to find Charlie and Latoya's number of texts:
4b = 4(22) = 88
b - 8 = 22 - 8 = 14
If the entire class lasts 7/8 of an hour, then it lasts 52.5 minutes as:
60/8 * 7 = 52.5mins or 52min 30secs
a) Then warm up and cool down lasts 3/10 of the class so this is:
52.5/10 * 3 = 15.75mins or 15min 45secs
b) Instruction is 1/5 of the class so 4/5 is not spent on instruction so:
52.5 / 5 * 4 = 42mins