You should use 22/7 when you are dealing with other fractions.
1. y=mx where m is the constant
7/2 = y/5
2y = 35
y = 35/2
y = 17.5
2. y=mx where m is the constant
5=m4
m= 5/4
8=5/4 x
x= 6.4
Answer:
Al is 12 yrs old
Judy is 6 yrs old
Step-by-step explanation:
<u>After</u>
Al=2units
Judy=1unit
<u>Before</u><u>(</u><u>t</u><u>h</u><u>r</u><u>e</u><u>e</u><u> </u><u>y</u><u>r</u><u>s</u><u> </u><u>a</u><u>g</u><u>o</u><u>)</u>
Al=2units-3
Judy=1unit-3
Since 3 times,
3units-9=2units-3
3units-9+3=2units
1unit=6
Let x = minimum electric rate (Cents/kWh)
Total months in 12 years is 12*12 = 144 m
1st freezer
Total cost over 12 years is
623.95 (cost) + (90 kWh/m)*(144 m)(x/100 $/kWh)
= 623.95 + 129.6x
2nd freezer
Total cost over 12 years is
500 + 100*144*(x/100)
= 500 + 144x
For the 1st freezer to cost less over 12 years,
623.95 + 129.6x < 500 + 144x
123.95 < 14.4x
8.61 < x
Answer: The minimum rate is 8.61 cents per kWh
Answer:
Step-by-step explanation:
6*6*6 = 6³
6 ---> is the base
How many time the number is occurring will be the exponent