Ask question

Ask question

All categories

melamori03 [73]

3 years ago

13

The red car went 408 miles in 6 hours. The blue car went 365 miles in 5 hours. Which car had the fastest average speed?

2 answers:

Alborosie3 years ago

5 0

I hope this helps you

madreJ [45]3 years ago

5 0

408 divided by 6 = 68
365 divided by 5 = 73

An average is the sum of all numbers (In this case its the miles) then divide by how many numbers there are (408 is one number)
So in this case we just divide 408 by 6

You might be interested in

a car travels 406 miles in 7 hours (with a constant speed). how mush time will it take traveling 435 miles?

o-na [289]

<span>rate = dist/time so 406/7=58 hope this help

</span>

4 0

2 years ago

Read 2 more answers

100 POINTS pre-calc

Salsk061 [2.6K]

Answer:

you got this don't freak out

8 0

2 years ago

If there are 48 oranges then how many apples are there?

UkoKoshka [18]

If this is a actual question then you are missing parts of it! Please leave a comment with the full question and I would be glad to help you out! If looking at what is given then 0 apples as all that is stated is only 48 oranges and no apples.

5 0

2 years ago

Read 2 more answers

Use the alternative form of the dot product to find u · v.

vodka [1.7K]

Answer:

Step-by-step explanation:

u = 45

v = 30

Angle between them, θ = 5π / 6 = 150°

(a) The formula for the dot product is given by

$\overrightarrow{u}.\overrightarrow{v}= u v Cos\theta$

$\overrightarrow{u}.\overrightarrow{v}= 45 \times 30 \times Cos150$

$\overrightarrow{u}.\overrightarrow{v}= -1169.13$

(b) $\overrightarrow{u}=Cos\frac{\pi }{3}\widehat{i}+Sin\frac{\pi }{3}\widehat{j}$

$\overrightarrow{u}=0.5\widehat{i}+0.866\widehat{j}$

$\overrightarrow{v}=Cos\frac{2\pi }{3}\widehat{i}+Sin\frac{2\pi }{3}\widehat{j}$

$\overrightarrow{v}=-0.707\widehat{i}+0.707\widehat{j}$

Let the angle between them is θ

The formula in terms of the dot product is given by

$Cos\theta =\frac{\overrightarrow{u}.\overrightarrow{v}}{u v}$

$u=\sqrt{0.5^{2}+0.866^{2}}=1$

$v=\sqrt{-0.707^{2}+0.707^{2}}=1$

$Cos\theta =\frac{0.5 \times (-0.707) + 0.866 \times 0.707)}{1\times 1}$

$Cos\theta=0.2587$

θ = 75°

(c) $\overrightarrow{u}=1\widehat{i}+4\widehat{j}+8\widehat{k}$

$u=\sqrt{1^{2}+4^{2}+8^{2}}=9$

$Cos\alpha =\frac{1}{9}$

$Cos\beta =\frac{4}{9}$

$Cos\gamma =\frac{8}{9}$

7 0

3 years ago

Which student types the most words per minute?

almond37 [142]

Lucy is the fastest

8 0

3 years ago

Read 2 more answers