Answer:
Barbara's speed in clear weather is and in the thunderstorm is .
Step-by-step explanation:
Let be the speed and be the time Barbara drives in clear weather, and let be the speed and be the time she drives in the thunderstorm.
Barbara drives 22 mph lower in the thunderstorm than in the clear weather; therefore,
(1).
Also,
(2).
(3). ,
and
(4).
From equations (2) and (3) we get:
putting these in equation (4) we get:
and substituting for from equation (1) we get:
This equation can be rewritten as
which has solutions
We take the first solution because it gives a positive value for
.
Thus, Barbara's speed in clear weather is and in the thunderstorm is .
Answer:
Step-by-step explanation: you just plug in -5 in the x and solve it.
F(-5)=2(-5)+4
F(-5)=-10+4
Answer: F(-5)=-6
Hope this help!
3 times 4 is 12. Tack 3 0's to get 12,000.
The dimensions for the pool would be (y+2)(4y-5)
Either the first one or the last one