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Fittoniya [83]
3 years ago
14

PLEASE HELP I DO NOT UNDERSTAND!

Mathematics
2 answers:
andrew-mc [135]3 years ago
8 0

Answer:

1.) x = -3 2.) x = 4/3 3.) x = 698/77 or 9.1

Step-by-step explanation:

1.) 4 + 2x = -2

2x = -2 - 4

2x = -6

x = -3

2.) -1 (3x - 12) = 9x - 4

-(3x - 12) = 9x - 4

-3x + 12 = 9x - 4

-3x - 9x = -4 - 12

-12x = -16

x = 4/3

3.) x - 4 = 13 (6x - 54)

x - 4 = 78x - 702

x - 78x = -702 + 4

-77x = -698

x = 698/77 or 9.1

alexgriva [62]3 years ago
3 0

Answer:

1. x = -3

2. x = 4/3

3. x = 698/77

Step-by-step explanation:

4+2x=-2

-4       -4

2x= -6

/2     /2

x=-3

You have to get x alone on one side. Search up on yt "How to solve for x on two sides."

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Bus A and Bus B leave the bus depot at 7 am.
Art [367]

Answer:

9:30 am

Step-by-step explanation:

We can make a chart and keep filling it in until we see the same time in both columns.

Bus A          Bus B

7:00             7:00

7:30             7:50

8:00            8:40

8:30           9:30

9:00            10:20

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Answer: 9:30 am

We can also use the least common multiple of 30 and 50.

We need to find the smallest number that is a multiple of both 30 and 50.

30 = 2 * 3 * 5

50 = 2 * 5^2

LCD = 2 * 3 * 5^2 = 150

The first time the buses will be at the depot together after 7:00 am is 150 minutes later. 150 minutes = 2 hours 30 minutes.

7:00 am + 2 hours and 30 minutes = 9:30 am

Answer: 9:30 am

3 0
3 years ago
Read 2 more answers
Three friends worked out on treadmills at the gym. Aiden walked 2 miles in 3/4 hour. Kira walked 1 3/4 mile in 30 minutes. Joe w
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Answer:

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Step-by-step explanation:

1.75*4 is greater than 1*5

3 0
3 years ago
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Step-by-step explanation:

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5 0
3 years ago
-3n divided by 8 equals 6
Amanda [17]
Simple this will look like this 
-3n
^^^=6
   8

multiply 8 by both sides to get rid of the fraction making it look like this,

-3n=48
then,simply divide 48 by -3. And your answer is n=-16.
6 0
3 years ago
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