Ask question

Ask question

All categories

3 years ago

12

Sally drives 66 miles in 3 hours and Molly drives 72 miles in 4 hours. What is the difference between their average speed, in mi

les per hour?
A.4
B.6
C.18
D.22
I will mark brainiest

1 answer:

Scrat [10]3 years ago

5 0

Answer: A

Step-by-step explanation:

Sally: 66/3=22

Molly: 72/4=18

22-18=4

You might be interested in

A car averaged 48 miles per hour traveling 672 miles from Washington to Orlando. How long was the trip?

lora16 [44]

14 hours
672 miles / 48 mph = 14 hours total

4 0

3 years ago

Read 2 more answers

Is (8,2) a solution for the system 2y=x-12

erica [24]

I hope this helps you

4 0

3 years ago

Read 2 more answers

How many questions can i ask brainly without position for community if i have 4000 points.

Masteriza [31]

Answer:

Depends on how much you offer for an answer. Offer 10 points and you'll be able to ask 400 questions. Offer 20 points, I think around 200 questions.

4 0

2 years ago

What is the average rate of change of the function

Reptile [31]

Answer:

Average rate of change $=-35.7084$

Step-by-step explanation:

Given function is $f(x)=480(0.3)^x$ and we need to find average rate of change of the function from $x=1\ to\ x=5$ .

Average rate of change $=\frac{f(b)-f(a)}{b-a}$

So,

$here\ b=5\ and\ a=1\\f(5)=480(0.3)^5\\=480\times0.00243=1.1664\\and\\f(1)=480(0.3)^1\\=480\times0.3=144$

Average rate of change

$=\frac{f(b)-f(a)}{b-a}\\\\=\frac{f(5)-f(1)}{5-1}\\\\=\frac{1.1664-144}{5-1}\\\\=\frac{-142.8336}{4}= -35.7084$

Hence, average rate of change of the function $f(x)=480(0.3)^x$ over the intervel $x=1\ to\ x=5$ is $=-35.7084$ .

5 0

3 years ago

The ratio of length :width :height of a box is 6 : 3 : 2. What is the volume if the height is 5 centimetres.

Dovator [93]

Answer:

90cm cube

Step-by-step explanation:

V= lbh

V= 6×3×5

V= 90cm cube

3 0

2 years ago