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2 years ago

M-18=n Dude this isn't even math

Mathematics

2 answers:

Papessa [141]2 years ago

8 0

Answer:

is like baby launge super cool

Step-by-step explanation:

Papessa [141]2 years ago

3 0

It is actually. The letters in the expression are known as variables. These can equal anything, input or output. I think it's because you haven't gotten into any of the algebra stuff yet.

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1)Sheyna drive to the lake and back. It took two hours less time to get there than it did to get back. The average speed on the

ipn [44]

Answer:

8 hours

Step-by-step explanation:

Given:

Sheyna drives to the lake with average speed of 60 mph and

$v_1 = 60\ mph$

Sheyna drives back from the lake with average speed of 36 mph

$v_2 = 36\ mph$

It took 2 hours less time to get there than it did to get back.

Let $t_1$ be the time taken to drive to lake.

Let $t_2$ be the time taken to drive back from lake.

$t_2-t_1 = 2$ hrs ..... (1)

To find:

Total time taken = ?

$t_1+t_2 = ?$

Solution:

Let D be the distance to lake.

Formula for time is given as:

$Time =\dfrac{Distance}{Speed }$

$t_1 = \dfrac{D}{60}\ hrs$

$t_2 = \dfrac{D}{36}\ hrs$

Putting in equation (1):

$\dfrac{D}{36}-\dfrac{D}{60} = 2\\\Rightarrow \dfrac{5D-3D}{180} = 2\\\Rightarrow \dfrac{2D}{180} = 2\\\Rightarrow D = 180\ miles$

So,

$t_1 = \dfrac{180}{60}\ hrs = 3 \ hrs$

$t_2 = \dfrac{180}{36}\ hrs = 5\ hrs$

So, the answer is:

$t_1+t_2 = \bold{8\ hrs}$

8 0

3 years ago

When adding the numbers 4+9+7+6+3 you can make one group of 10.True or False

Keith_Richards [23]

Answer:

false

Step-by-step explanation:

6 0

2 years ago

Solve for k.<br> 6k - 8 = 4K + 15

Brut [27]

Hi,

Answer:

k = $\frac{23}{2}$

Step-by-step explanation:

Subtract 4k from both sides

6k - 4k = 2k

2k - 8 = 15

Add 8 on both sides (you want to get rid of the 8 in order to leave the k alone)

2k = 23

k = 23/2

Have a good day!

4 0

3 years ago

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Solve for r <br><br> 5-2(1-6r)=24

sammy [17]

You will get r= 21/12 but you have to simplify to get R=7/4 or R=1.75

5 0

2 years ago

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PLS HELP ME I BEG YOU<br> Pleaseee help me solve this sistem of equations with stepss

Sophie [7]

The answer should be 16

5 0

2 years ago