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2 years ago

PLEASE HELP ME ASAP?!?(2questions) 60POINTS+BRAINLIEST

Mathematics

1 answer:

Elodia [21]2 years ago

4 0

It says that there was an error with my answer, but I don't know what, so I screenshotted what I typed and attached them as 4 images below:

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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:

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

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3 years ago

What's the ratio 48:30

Vladimir79 [104]

24:15 would be the simplified version, if that's what you meant.

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3 years ago

Find the quotient. 12a^3p^4 ÷ -2a^2p

777dan777 [17]

Answer:

-(6ap³)

Step-by-step explanation:

We have to find the quotients of

$\frac{12a^{3}p^{4}}{-2a^{2}p}$

We take the common 2a² p from the numerator

= $\frac{(6ap^{3}(2a^{2}p))}{(-2a^{2}p)}$

= -(6ap³)

Therefore, the quotient after division will be -(6ap³)

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3 years ago

Please help with math problem give 5 star if do

Juliette [100K]

Answer:

C : -6

Step-by-step explanation:

Please Mark Me Brainliest!

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2 years ago

Read 2 more answers

Please answer this I really need help, Ariel spent a total of $3.42 buying dried apricots from the bulk bins, which were on sale

Kamila [148]

Answer:

1.2 lbs

Step-by-step explanation:

This problem is set up so that the total price is proportional to the price per pound, so to find the proportion you would divide the total cost by the cost per pound. 3.42/2.85 = 1.2, so the answer is 1.2 pounds.

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3 years ago