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givi [52]
3 years ago
9

5(7 − 4)2 ÷ 3 + 11 =

Mathematics
1 answer:
Ksivusya [100]3 years ago
8 0

Answer:

21

Step-by-step explanation:

you subtract 7 and 4 and you will get 5 times 3 times 2 divide by 3 plus 11. then you divide 3 on both sides and you'll get 5 times 1 times 2 plus 11. then you multiply 5 with 2 and add 11. you'll get 10 plus 11 and you will get your answer as 21.

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I need this answered Fast if possible. A car is traveling on a small highway and is either going 55 miles per hour or 35 miles
Alex787 [66]

a. It spends about 2.045 hours going 55 miles per hour

b. It spends 1 hour going 35 miles per hour

c. The trip would take about 3.64 hours

Step-by-step explanation:

A car is traveling on a small highway and is either going 55 miles per hour or 35 miles  per hour, depending on the speed limits, until it reaches its destination 200 miles  away

  • x represents the amount of time in hours that the car is going 55 miles per  hour
  • y represents the amount of time in hours that the car is going 35 miles per hour
  • The equation  that describing the relationship is 55x + 35y = 200

We need to find:

a. How long does it  spend going 55 miles per hour, if the car spends 2.5 hours going 35 miles per hour on the trip

∵ 55x + 35y = 200

∵ The car spends 2.5 hours going 35 miles per hour on the trip

∵ y represents the amount of time that the car going 35 mi./h

∴ y = 2.5

- Substitute the value of y in the equation to find the value of x

∴ 55x + 35(2.5) = 200

∴ 55x + 87.5 = 200

- Subtract 87.5 from both sides

∴ 55x = 112.5

- Divide both sides by 55

∴ x = 2.045 hours

It spends about 2.045 hours going 55 miles per hour

b.how long does it  spend going 35 miles per hour, if the car spends 3 hours going 55 miles per hour on the trip

∵ 55x + 35y = 200

∵ The car spends 3 hours going 55 miles per hour on the trip

∵ x represents the amount of time that the car going 55 mi./h

∴ x = 3

- Substitute the value of y in the equation to find the value of x

∴ 55(3) + 35y = 200

∴ 165 + 35y = 200

- Subtract 165 from both sides

∴ 35y = 35

- Divide both sides by 35

∴ y = 1 hour

It spends 1 hour going 35 miles per hour

c. How long would the trip take, if the car spends no time going 35 miles per hour

∵ 55x + 35y = 200

∵ The car spends no time going 35 miles per hour

∴ y = 0

- Substitute the value of y in the equation to find the value of x

∴ 55x + 35(0) = 200

∴ 55x  = 200

- Divide both sides by 55

∴ x = 3.63 hours

The trip would take about 3.64 hours

Learn more:

You can learn more about the equations in brainly.com/question/4097107

#LearnwithBrainly

5 0
3 years ago
Which of the following functions is graphed below?
Varvara68 [4.7K]

Answer:

what  are you trying to ask?

Step-by-step explanation:

8 0
3 years ago
It is a Saturday morning and Jeremy has discovered he has a leak coming from the water heater in his attic. Since plumbers charg
Jet001 [13]
The answer is
A
"For every half an hour there is 1/5 of the bucket is filled"    Hope I helped                                                                                 
B: Not sure not very good at equations :(                                                      
C: Well there is Half an hour so if you multiply that by 5 then its. 2 1/2 hours :)
Hope I helped








4 0
3 years ago
Read 2 more answers
(Reposted) Help Please I will give Brainliest if correct!!
Serhud [2]

Answer:

I think it is 1/25k if not im sorry

5 0
2 years ago
Read 2 more answers
38.25, 37.5, 36.75, blank, blank ,
Anestetic [448]

Step-by-step explanation:

38.25, 37.5, 36.75,35.75,34.75

6 0
3 years ago
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