Ill give brainliest for help with algebra. random answers will be reported. 1. bette drives at 60 miles per hour for 2 1/2 hours and at 75 miles for 1 1/2 hours. what is her average rate of speed?
2. kim has $4.75 in nickles and dimes. if she has twice as many dimes as nickels, how many of each coin does she have?

Ok, so I don't have the answer for this one, but I think I understand the process.

Step-by-step explanation:

So to find the average rate of 2 speeds, you must add them together and then divide by two.

So for this question, I think you have to find the rate of speed for 60 miles an hour for 2.5 hours and then do the same for 75 miles for 1.5 hours. Once you have those two numbers, add them together and divide by two to get your answer.

I hope this helps!

a) 40 more; b) old factory:   10%, new factory:   16%; c) week 4

explanation:

a) at week 0, we see in the graph that the new factory produces 190 specialty items.  

using the function, substituting 0 in for w,

this is a difference of 230-190 = 40.

b) the function for the old factory is written in the form f(x) = a(1+r)ˣ, where a is the original amount, x is the amount of time and r is the growth rate.   the equation for the old factory is ; 230 is in place of a and is the original amount; w is the amount of time; which means 1+r = 1.1.   this means that r must be 0.1 or 10%.

for the new factory, we find the percent of increase to find the growth rate; the formula for this is

between the first two points, the amount of change is 220-190 = 30; this gives us

30/190 = 0.158 ≈ 0.16 = 16%

c) at week 0, the old factory has 230 while the new factory has 190.

at week 1, the old factory has 230(1.1) = 253 while the new factory has 220.

at week 2, the old factory has 230(1.1²) = 278.3 while the new factory has 252.

at week 3, the old factory has 230(1.1³) = 306.13 while the new factory has 290.

at week 4, the old factory has 230(1.1⁴) = 336.743 while the new factory has 337.   this is the first week that the new factory surpasses the old.