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erik [133]
3 years ago
7

Please help ASAP! I will mark Brainliest! Please answer CORRECTLY! No guessing! Show your work!

Mathematics
1 answer:
Margaret [11]3 years ago
4 0

Answer:

b

Step-by-step explanation:

you should use mathaway, it's really useful

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On Saturday morning, Ahmed decided to take a bike ride from one end of the 15-mile bike trail to the other end of the bike trail
frosja888 [35]

The expression which relates the total time taken and the time taken for the trip is [15s + 15(s+2)] / s² + 2s and 2.32 hours respectively.

<em>Travel time = distance ÷ speed </em>

<u>Second half of the trip</u> :

  • <em>Speed = s mph</em>

  • <em>Distance covered = 15 miles</em>

<u>Time taken for second half of trip</u> :

Time taken = 15 / s

<u>First half of the trip</u> :

  • <em>Speed = s + 2 mph </em>

<u>Time taken for first half of trip :</u>

Time taken = 15 / (s+2)

<u>Total time taken :</u>

<em>First half + second half</em>

15/(s+2) + 15/s = [15s + 15(s+2)] / s² + 2s

B)

If s = 12

<em>Substitute s = 12 into the expression</em> :

[15(12) + 15(12+2)] / 12² + 2(12)

[180 + 210] / 144 + 24

390 / 168

= 2.32 hours

Therefore, the total time taken is 2.32 hours.

Learn more : brainly.com/question/18796573

3 0
2 years ago
Jim thinks of a number (n). He adds 5 to the
Karolina [17]

Answers + Step-by-step explanation :

a) the equation should be:
7(n + 5) = 91 since you first add 5 to n and then multiply it by 7. The answer is 91 so that is on the other side of the equal sign

b) we can solve our equation to find for n, the number jim thought of

7(n + 5) = 91
I will use the distributive property.

7n + 35 = 91

Subtract 35 on both sides

7n = 56

Now divide 7 on both sides to find n

n = 8

The number Jim was thinking of was 8! this should be correct, hope this helps!

4 0
1 year ago
Help me please. need quickly. What is the value of Z
larisa86 [58]

Answer:

z = 6

Step-by-step explanation:

8z-36=2z\\6z-36=0\\6z=36\\z=6

8 0
2 years ago
Jorge has 235 baseball cards. If Keith were to double the number of baseball
Nana76 [90]
A because 2b is b times 2 and 235 is bigger
5 0
3 years ago
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Let f(x) = -2x - 7 and g(x) = -4x + 6. Find (f o g)(-5)
vladimir2022 [97]
It’s probably-67 on the top of my head
6 0
3 years ago
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