Answer:
Step-by-step explanation:
1.
(a) GCF, and LCM of 14 and 21
GCF: 7 LCM: 42
(b) GCF, and LCM 15 and 25
GCF: 5 LCM:75
Step-by-step explanation:
Step one:
let the hours for babysitting be x
and the hours for doing clerical be y
we are told that Carson would like to earn $96 weekly
She babysits for $6 per hour
and earned $8 per hour doing clerical work
6x+8y=96---------------1
Carson cannot work more than a total of 15 hours per week
5x+y≤15-------------2
The system of equation for the situation is
6x+8y=96
5
x+y≤15
y=15-5
x
put y=15-5
x in eqn 1
6x+8(15-5
x)=96
6x+120-40x=96
collect like terms
6x-40x=96-120
-34x=-24
x=24/34
x=0.7
Approximately 1 hour babysitting
put x= 0.7 in 5x+y≤15
5(0.7)+y≤15
3.52+y≤15
y≤15-3.52
y=11.4
Approximately 11 hours doing clerical work
Answer:
I'm pretty sure its 3 times the number of cellular phones
David would need 22 bags.
(78 - 12) <span>÷ 3 = 22</span>