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3 years ago

Can someone please help me answer this question asap thank you Without a link thank you .

Mathematics

1 answer:

Alex17521 [72]3 years ago

4 0

Answer:

-1.4, -.7 .003, 3%(.03), .3, .66(2/3) .85 (7/8) 0.875, 100/50 (2)

Step-by-step explanation:

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If a car travels 120 miles in 2 hours, what is its rate of speed expressed as a unit rate?

erastovalidia [21]

The speed is 60 miles per hour

Step-by-step explanation:

Speed is the distance covered per unit time.

The formula for speed is:

$Speed = \frac{distance}{time}\\$

Given

Distance = d = 120 miles

Time = t = 2 hours

Putting the values in the formula

$s = \frac{d}{t}\\=\frac{120}{2}\\= 60$

The speed is 60 miles per hour

Keywords: Speed, distance

Learn more about speed at:

#LearnwithBrainly

8 0

3 years ago

2. 8x - 20y - 10<br> What are the coefficients

Finger [1]

Answer:

8x and -20y

Step-by-step explanation:

any number that contains a variable is a coefficient.

6 0

3 years ago

As many as 60,000 bees can live in 3 cubic feet of space. There are about 360,000 bees in a rectangular obveservation beehive th

MakcuM [25]

1 foot because

2 times 3 = 6

60,000 times 6 = 360,000

4 0

4 years ago

I need help..................

Viktor [21]

Answer:

what is your favorite color

which subject do the students in my class like

what is the height of each student in my class

Step-by-step explanation:

7 0

3 years ago

Determine the projection of vector w onto vector u. u=9i-6j, v=-3i-2j, w=19i+15j

Naily [24]

Answer:

$proj_uw=6.2i-4.2j$

Step-by-step explanation:

The projection of a vector $v$ onto a vector $u$ is defined as the projection of the vector $v$ on the line that contains the vector $u$ . It can be calculated using the following formula:

$proj_uv=\frac{u\cdot v}{||u||^2} u$

Where:

$u\cdot v$

Is the dot product between $u$ and $v$ which is given by:

$u\cdot v= $$\sum_{i=1}^{n} u_iv_i= u_1v_1+u_2v_2+...+u_nv_n$$$

and:

$||u||$

Is the magnitude of vector which can be calculated as follows:

$||u||=\sqrt{u_1^2+u_2^2+...+u_n^2}$

In this sense, the projection of vector w onto vector u is:

$proj_uw=\frac{u\cdot w}{||u||^2} u$

Where the dot product between $u$ and $w$ is:

$u\cdot w =(9*19)+(-6*15)=171-90=81$

And the magnitude of $u$ is:

$||u||=\sqrt{9^2+(-6)^2} = 3 \sqrt{13}$

Thus:

$proj_uw=\frac{u\cdot w}{||u||^2} u=\frac{81}{117} \langle9,-6\rangle=\langle6.23,-4.15\rangle\approx6.2i-4.2j$

8 0

3 years ago