Ask question

Ask question

All categories

4 years ago

15

Prompt:

2 answers:

Roman55 [17]4 years ago

8 0

Answer:

I got this answer from the answer above but put it into my own words...

Sasha is incorrect. She concluded that the object hit the ground at -1.71 seconds, when that is impossible because there is no way an object can hit the ground in negative seconds. What she could have done was used the quadratic formula because it works for every problem, but it does take more time than any other problem.

Vadim26 [7]4 years ago

4 0

Answer:

Her answer is wrong because she the object cannot hit the ground at negative seconds. She could’ve have used other methods because she used the quadratic formula. The advantages is that it works for every situation. The disadvantages is that it takes longer. She should’ve used a different method.

Step-by-step explanation:

You might be interested in

Help me i'll help you back

Dmitriy789 [7]

Answer:

A, C, B, respectively

Step-by-step explanation:

science(density and buoyancy)

8 0

3 years ago

For vectors u= (3,4) and v= (1,3) find CompuV and the angle between u and v.

vampirchik [111]

Answer:

The angle between the given vectors u and v is $\theta=cos^{-1}\left[\frac{3}{\sqrt{10}}\right]$

Step-by-step explanation:

Given vectors are $\overrightarrow{u}=(3,4)$ and $\overrightarrow{v}=(1,3)$

Now compute the dot product of u and v:

$\overrightarrow{u}.\overrightarrow{v}=(3,4).(1,3)$

$=(3)(1)+(4)(3)$

$=3+12$

$=15$

Now find the magnitude of u and v:

$|\overrightarrow{u}|=\sqrt{3^2+4^2}$

$=\sqrt{9+16}$

$=\sqrt{25}$

$=5$

$|\overrightarrow{u}|=5$

$|\overrightarrow{v}|=\sqrt{1^2+3^2}$

$=\sqrt{1+9}$

$=\sqrt{10}$

$|\overrightarrow{v}|=\sqrt{10}$

To find the angle between the given vectors

$\overrightarrow{u}.\overrightarrow{v}=|\overrightarrow{u}|\overrightarrow{v}|cos\theta$

$\theta=cos^{-1}\left[\frac{\overrightarrow{u}.\overrightarrow{v}}{|\overrightarrow{u}|\overrightarrow{v}|}\right]$

$=cos^{-1}\left[\frac{15}{5\times \sqrt{10}}\right]$

$=cos^{-1}\left[\frac{15}{5\times \sqrt{10}}\right]$

$\theta=cos^{-1}\left[\frac{3}{\sqrt{10}}\right]$

Therefore the angle between the vectors u and v is

$\theta=cos^{-1}\left[\frac{3}{\sqrt{10}}\right]$

3 0

3 years ago

PLZ HELP FAST FIRST PERSON TO ANSWER OR WHOEVER GETS RIGHT GETS BRAINLYEST

borishaifa [10]

Its c 33 degrees this is because all triangles have a sum of 180 and if you subtract the other angles from 180 you get 33

6 0

3 years ago

Read 2 more answers

-4 ( -3 + 7v )= -7v + 33

PSYCHO15rus [73]

Answer:

v = -1

Step-by-step explanation:

-4 (-3 + 7v) = -7v + 33

12 -28v = -7v + 33

-12 -12

-28v = -7v + 21

-28v + 7v = 21

-21v = 21

-21÷-21 = 21÷-21

v = -1

5 0

1 year ago

One quart equals 946.35 milliliters. How many milliliters are in 3 pints

Allisa [31]

Answer:

There are 1419.5 ml in 3 pints

Step-by-step explanation:

The pint is a unit used to measure volume. When measuring many cups of liquid all put together we might want to use quarts.

A quart (qt) is the same thing as 4 cups or 2 pints.

1 quart = 2 pints = 4 cups

Now we have to find how many ml in 3 pints.

1 pint = 473.17647 ml

Now multiply the quantity of pint given in the question by 473.17647 ml.

3 * 473.17647

= 1419.52941 ml

By rounding off we get:

=1419.5 ml

Thus there are 1419.5 ml in 3 pints....

7 0

3 years ago