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andreev551 [17]
3 years ago
11

PLEASE HELP

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
8 0
Direct variation equal is written as :  y = kx

K is the constant of variation. 

12 = k4
12/4 = k
k = 3

y = 3x

Answer: <span>B. y = 3x </span>
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Which is traveling faster, a car whose velocity vector is 201 + 25), or a car whose velocity vector is 30i, assuming that the un
ioda

Answer with explanation:

For any object having the velocity vector as

\overrightarrow{v}=v_x\widehat{i}+v_y\widehat{j}+v_z\widehat{k}

the magnitude of velocity is given by

|v|=\sqrt{v_x^2+v_y^2+v_z^2}

For car 1 the velocity vector is

\overrightarrow{v}_1=20\widehat{i}+25\widehat{j}

Therefore

|v_1|=\sqrt{20^2+25^2}\\\\\therefore v_1=32.0156units

Similarly for car 2 we have

\overrightarrow{v}_2=30\widehat{i}

Therefore

|v_2|=\sqrt{30^2}\\\\\therefore v_2=30.0units

Comparing both the values we find that car 1 has the greater speed.

7 0
3 years ago
A triangle has area 42 cm squared find the height in centimeters if it is 5 cm shorter than the base
topjm [15]
<span>Base = 12cm
Height = 7cm</span>
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3 years ago
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4 years ago
When three times the sum of a number and seven is increased by ten, the result is four. What is the number ?
densk [106]

Answer:

x=9   :))

Step-by-step explanation:

First set up your equation.

"3 times" is multiplication

"THE SUM of A NUMBER and seven" that is parenthesis because of the multiplication before it

"is increased by ten" that is an addition at the end

Now we have 3(x+7)+10=4

Solve your equation!

Distribute the 3 now we have 3x+21+10=4

Add like terms

now it should look like this... 3x+31=4

Subtract 31 from both sides and it looks like...

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Divide by the x-value

x=9

4 0
4 years ago
Which sequence or sequences are correct and why?
inessss [21]

Answer:

didn't get the question did u forget to put the sequence ???????

pls write the question fully so that I can help you

4 0
3 years ago
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