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3 years ago

7

a streamer going downstream in a river cover the distance between two towns in 15 hours coming back upstream it covers the dista

nce in 20 hours the speed of the water is 3 kilometre per hour . find the distance between two towns

1 answer:

Colt1911 [192]3 years ago

4 0

Answer:

80 miles is correct answer ok

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Find the radius and the diameter to the nearest hundredth when C = 7π yd. Use 3.14 for π.

valentinak56 [21]

Answer:

Diameter = 7

Radius = 3.5

Step-by-step explanation:

Hi! Ace here.

So, the formula to find circumference is dπ or 2rπ

So to find the diameter, you do the circumference/π

To find the radius, you'd do the circumference/2π

Plug-in those numbers and there you go!

Hope this helps, let me know if you have any questions.

I know this was a very vague explanation so I encourage you to ask any questions. Thank you!

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3 years ago

Which is a composite number 21,43,29,37

Westkost [7]

Answer:

29

Step-by-step explanation:

it has more than 2 factors.

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4 years ago

Write three different equivalent expressions to 5(2x + 6) +25x + 12.

elena-s [515]

5(2x+6)

2x+6+25

25x+12

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3 years ago

Can someone help me Find the value of X

Aleksandr [31]

Answer: x=4

Step-by-step explanation:

similar triangle so corresponding parts are similar

$\frac{5}{10} = \frac{2x-1}{14}$

cross multiply

70 = 20x-10

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3 0

3 years ago

Write two polynomials whose sum is x to the second power and whose difference is 1

Alex777 [14]

Answer:

Therefore, the first polynomial is:

$Z=\frac{1}{2}x^2+\frac{1}{2}\\$

the second polynomial is:

$Y=\frac{1}{2}x^2-\frac{1}{2}\\$

Step-by-step explanation:

We assume that: Z is first polynomial and Y is second polynomial.

Therefore, we have

$Z+Y=x^2\\\\Z-Y=1\\\\\implies Z+Y+Z-Y=x^2+1\\\\2Z=x^2+1\\\\Z=\frac{1}{2}x^2+\frac{1}{2}\\$

now, we get

$\implies Z+Y-Z+Y=x^2-1\\\\2Y=x^2-1\\\\Y=\frac{1}{2}x^2 -\frac{1}{2}$

Therefore, the first polynomial is:

$Z=\frac{1}{2}x^2+\frac{1}{2}\\$

the second polynomial is:

$Y=\frac{1}{2}x^2-\frac{1}{2}\\$

6 0

3 years ago