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3 years ago

How many solutions does y=2x+2,4x-2y=4 have?

Mathematics

1 answer:

Crazy boy [7]3 years ago

7 0

It has No solutions. .

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James and Lucas competed in climbing a mountain and coming back. James climbed at an average rate of 3 mph and ran back at 4 mph

Bogdan [553]

It took 70 minutes for James to finish and 84 minutes for Lucas to finish and James was faster.

Step-by-step explanation:

Given,

Climbing rate of James = 3 mph

Running back rate of James = 4 mph

Climbing rate of Lucas = 2 mph

Running back rate = 5 mph

Total distance = 2 miles

We know that;

Distance = Speed * Time

As we have to find, we will rearrange the formula in terms of time

$Time=\frac{Distance}{Speed}$

Time took by James for climbing = $\frac{2}{3}\ hours$

Time took for running back = $\frac{2}{4}\ hours$

Total time = $\frac{2}{3}+\frac{2}{4}=\frac{8+6}{12}=\frac{14}{12}$

Total time taken by James = $\frac{7}{6}\ hours$

1 hour = 60

Total time taken by James = $\frac{7}{6}*60=70\ minutes$

Time took by Lucas for climbing = $\frac{2}{2}=\ 1\ hour$

Time took by Lucas for climbing = 60 minutes

Time took on return = $\frac{2}{5} of\ an\ hour=\frac{2}{5}*60=24\ minutes$

Total time taken by Lucas = 60+24 = 84 minutes

Therefore,

It took 70 minutes for James to finish and 84 minutes for Lucas to finish and James was faster.

Keywords: distance, speed

Learn more about distance at:

#LearnwithBrainly

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3 years ago

30 POINTS! PLEASE HELP!

nikklg [1K]

Triangle ABC is similar to triangle JKL. They both have the same angle amounts.

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3 years ago

Kelsi's mom, Sue, is 8 times as old as Kelsi. In 10 years , Sue will be 3 times as old as Kelsi. How old are Kelsi and Sue now?

777dan777 [17]

8x+10=3(X+10)
8x+10=3x+30
5x= 20
X=4
Kelsi 4
Mom 32

7 0

4 years ago

Read 2 more answers

What is b b+12=26 38 24 14 10

gregori [183]

Answer:

b=14

Step-by-step explanation:

have a nice day and stay safe:)

3 0

3 years ago

Read 2 more answers

Can anyone help me with this problem

Rama09 [41]

9514 1404 393

Answer:

8. A = {Delaware, New Jersey, Pennsylvania}

9. |B| = 3

Step-by-step explanation:

8. Dates prior to 1 Jan 1788 are those in 1787. The three states admitted in 1787 are listed as Delaware, Pennsylvania, New Jersey. It is usually convenient to list elements of a set in lexicographical order:

A = {Delaware, New Jersey, Pennsylvania}

9. The months June and July appear 3 separate times on the list, so there would be 3 elements in the set B.

|B| = 3

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3 years ago