All I know is a I don't know the rest
Answer:
C. 2z + 3 / z - 3
Step-by-step explanation:
Just took the test and got 100%
Answer:
- <u><em>The lamp burns 6 ounces of oil per min.</em></u>
Explanation:
That the oil of a lamp burns at a <em>linear rate</em> means that the rate of burn is constant.
Hence, you can calcualte the rate with which the lamp burns the oil using any two ordered pairs.
- Rate of burn = [ change in oil ] / [change in time]
- Rate of burn = [Oil at time 2- Oil at time 1 ] / [time 2 - time 1]
Your two ordered pairs are (13 ounces, 10 min) and (7 ounces, 38 min).
Substituting those pairs in the equation for the rate, you get:
- Rate = [ 7 ounces - 13 ounces ] / [38 min - 10 min]
- Rate = ( - 6 ounces) / (18 min) = - 1/3 oz / min ≈ - 0.33 oz / min
The negative sign just shows that the amount of oil is decreasing (the oil is being burned).
Hence, the lamp burns 6 ounces of oil per min.
Pay=pay per minute times minutes
find how many minutes
1hr=60 mins
times 5
5hr=300mins
7 days
300min per day
ties 7
2100mins total
pay=salary rate times mins
pay=2 times 2100
pay=4200
makes $4200 per week
(he makes $120 per hour, that's alot!)
Let the sister be x years old.
Then Jessica is x + 5 years old.
Their ages add to 47.
x + x + 5 = 47
2x + 5 = 47
2x = 42
x = 21
x + 5 = 26
Jessica is 26, and her sister is 21.