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vladimir1956 [14]
2 years ago
11

Help asap, please! <3

Mathematics
1 answer:
o-na [289]2 years ago
5 0

Answer:

a = 9

Step-by-step explanation:

Let's make the demoninators of the 2 fractions the same :
(2a+8)/10 - (5a +15)/10 = 5

(2a + 8 - 5a + 15)/10 = 5

=> -3a + 23 = 50
=> -3a = 27
=> a = 9

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Brielle and Joshua are running a half marathon race, which is 13.1 miles long. It takes Brielle 10 minutes to run 1.25 miles and
CaHeK987 [17]

Answer: Brielle will run the marathon faster.

Brielle = 104.8 minutes  

Joshua = 157.2 minutes

Step-by-step explanation:

Speed rate = distance /time

Brielle = 1.25 /10 = 0.125 miles per minute

Joshua = 1.5/18 = 0.083333 =1/12 miles per minute

Since 0.125 (Brielle) > 1/12 (Joshua)

Brielle will run the marathon faster.

To calculate the time that takes each one to run the entire race (13.1 miles)

Time= distance / speed

  • Brielle = 13.1 /0.125 = 104.8 minutes
  • Joshua = 13.1 / (1/12)= 157.2 minutes

Feel free to ask for more if needed or if you did not understand something.

8 0
2 years ago
Please help will give brainless and extra points
Aleksandr-060686 [28]

Answer:

1. 52

2. 65

3. 68

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Help pls i don’t know how to do this
Vlada [557]

Answer:

m∠1= 79

Step-by-step explanation:

What we have here is two vertical lines and one intersecting point.

The m∠1 and m∠6 are vertical angles, which means that they equal to each other. So, the equation would be: 6x+25= 10x-11.

Step 1- Subtract 6x to both sides.

6x+25= 10x-11

-6x        -6x

25= 4x-11

Step 2- Add 11 to both sides.

25= 4x-11

+11       +11

36= 4x

Step 3- Divide both sides by 4.

<u>36</u>= <u>4x</u>

4     4

x= 9

Now that we know the value of the variable x, substitute it into the equation for m∠1.

m∠1= 10(9)-11

m∠1= 90-11

m∠= 79

<u>Check            </u>

m∠6= 6(9)+25

m∠6= 54+25

m∠6= 79

Since m∠1 and m∠6 are vertical angles, they should equal each other.

4 0
3 years ago
The value of the solid's surface area is equal to the value of the solid's volume. Find the value of x
scoray [572]

Answer:

6

Step-by-step explanation:

6s^2=s^3

divide by s^2 on both sides to get 6=s. There is your answer

4 0
2 years ago
Help with this question anyone?
Art [367]
Adding 49 will explain it properly just do that and you will get the answers
6 0
3 years ago
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