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3 years ago

Can someone help me with these math questions?

Mathematics

1 answer:

Juli2301 [7.4K]3 years ago

3 0

Answer: 24

Step-by-step explanation:

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HELP PLEASE BRAINIEST

yaroslaw [1]

Answer:

Option A is correct answer

Step-by-step explanation:

mark me brainliest

8 0

3 years ago

Please help with 17 and 19

fomenos

Answer:

soory to say but you can search

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3 years ago

Loren drove 200 miles at a certain rate, and his wife, Lois, drove 100 miles at a rate 10 mph slower. If Loren had driven for th

NeX [460]

As long as Loren drove, the law of motion was

$200 = st_1 \implies t_1 = \dfrac{200}{s}$

As long as Loid drove, the law of motion was

$100 = (s-10)t_2 \implies t_2 = \dfrac{100}{s-10}$

So, the total time they took is

$t_1+t_2=\dfrac{200}{s}+\dfrac{100}{s-10}$

Had Loren driven the whole time, the law of motion would have been

$300=st_3 \implies t_3 = \dfrac{300}{s}$

And we know that this time would have been 30 minutes (i.e. 0.5 hours) faster. So, we have

$t_3 = t_1+t_2-0.5$

This translates into

$\dfrac{300}{s}=\dfrac{200}{s}+\dfrac{100}{s-10}-\dfrac{1}{2}$

If we subtract 200/s from both sides, we have

$\dfrac{100}{s}=\dfrac{100}{s-10}-\dfrac{1}{2}$

We can simplify the right hand side by summing the two fractions:

$\dfrac{100}{s-10}-\dfrac{1}{2} = \dfrac{200-(s-10)}{2(s-10)}=\dfrac{210-s}{2(s-10)}$

So, we have to solve

$\dfrac{100}{s}=\dfrac{210-s}{2(s-10)}$

If we cross multiply the denominators, we have

$200(s-10)=s(210-s) \iff 200s-2000=210s-s^2 \iff s^2-10s-2000=0$

Which yields the solutions

$s=-40,\quad s=50$

We accept the positive solution, because the negative would mean to travel backwards, so Loren's rate was 50mph

5 0

3 years ago

Read 2 more answers

As VP for operations at Méndez-Pinero Engineering, you must decide which product design, A or B, has the higher reliability.

slega [8]

Answer:

Check the explanation

Step-by-step explanation:

The overall reliability of the system provided in design A = 89.13 %

Product design B has higher reliability than design A.

Overall reliability of system provided in design B = 89.85 %.

Kindly check the attached image below to see the step by step explanation to the question above.

4 0

4 years ago

Can someone help with this question. Please show your work, thanks!

julsineya [31]

X / 90 = 100/36

36x = 9000
x = 9000/36
x = 250 feet

3 0

4 years ago