two men start from 2 places 600km apart and travel towards each other, the first travelling 5km/h faster than the other. they meet after 8 hours. what is the speed of the fastest man? I know that this relates to the following formula; speed = distance/time, but don't understand how to resolve correctly
Answers
If they meet after 8 hours, then the sum of their average speeds is 600/8=75 km per hour. If one is 5 km per hour faster than the other, then if we set the speed of the slower man to x, we have:
2x+5=75
So:
2x=70
x=30
The fastest man is 5 km per hour faster than the slower, so he travels 35 km per hour.
A carton of paper is priced at $27.00 now. If the paper goes on sale for 25% off the current price, what will be the sale price of the carton?
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I think the answer would be $33.75.
What is x4-81 factored?
Answers
What we need here:
"The difference of two squares is the same as (their sum) times (their difference)."
x^4 is the square of x² . 81 is the square of 9 . Their difference is the same as (x² + 9) times (x² - 9).
But (x² - 9) is also the difference of two squares, so it's the same thing as (x+ 3) times (x-3).
So the complete factored form of the original expression is
(x^4 - 81) = (x² + 9) (x+3) (x - 3)
Evaluate the expression 8 - 3 × 2 + 5.
7 15 29 56
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First, multiply 2 by 3. That will give you 6. Then, subtract 6 from 8, you'll get an answer equivalent to 2. 2 + 5 = 7.
Answer:7
Step-by-step explanation:
Sin inverse[sin 6pi/7]. I'm suppose to find the exact value.
Answers
Please help I'm desperate...Solve the systems:
a. y=50+3x
y=100-2x
b. x+3y=9
-3x+2y=8
Thanks for helping
(will give brainliest <3)
Answers
the first step that isn’t show here is expressing the system in standard form. I assumed you would already know how to do that so I didn’t include it As for the second system, I’d be happy to give you a solution for that as well, but I can only post one photo per question so you would have to post it again :)
I recommend you use the app photomath you just have to take a picture of your exercise.