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3 years ago

Can you help me with this question please by the way its not 101

Mathematics

1 answer:

Leto [7]3 years ago

3 0

Answer:

Step-by-step explanation:

101+38=139

180-139 = 41

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A number increased by a% and decreased by 80% is 400. What is the number?

vladimir2022 [97]

Answer:

If we have a given number N, and we increase it by x%, then the new number is:

N + (x%/100%)*N

While if we decrease it by x%, the new number will be:

N - (x%/100%)*N

Now, we know that:

"A number increased by a% and decreased by 80% is 400. What is the number?"

First, we can not solve the problem, because we have two unknown values, the original number and the "a%", which I guess is a typo.

So, to be general with my answer, let's assume that the actual question is:

"A number increased by 50% and decreased by 80% is 400. What is the number?"

Then, if our original number is N and we increase it by 50%, the new number will be:

N + N*(50%/100%)

N + N*0.5

N*(1 + 0.5)

N*(1.5)

Now we decrease it by 80%, and that will be equal to 400, then:

N*1.5 - N*(1.5)*(80%/100%) = 400

N*1.5 - N*1.5*0.8 = 400

N*(1.5 - 1.5*0.8) = 400

N*(0.3) = 400

N = 400/0.3 = 1,333.33...

Remember that this is a kinda general solution, so you can understand how to solve this type of problem.

4 0

3 years ago

Sheila has 5 times as many markers as Dave. Together, they have 18markers. How many markers does Sheila have?

balu736 [363]

Sheila has 13 markers

3 0

3 years ago

Solve for x. Round your answer to the nearest tenth if necessary.

eduard

Answer: 15.9

Step-by-step explanation:

7 0

2 years ago

Please help pleaseeeeeee

marysya [2.9K]

Answer:

Step-by-step explanation:

it's basically 2+7

3 0

3 years ago

Read 2 more answers

I need help with this ASAP!

earnstyle [38]

Answer and Step-by-step explanation:

1) If you graph the lines, you will get the lines in the first attachment. You will see that the intersection point is (3, 5), which is the solution to that system.

2) First, let's convert both of these into slope-intercept form so that they're easier to graph.

x - 3y = 2

x = 3y + 2

3y = x - 2

y = $\frac{1}{3}x-\frac{2}{3}$

AND

-3x + 9y = -6

9y = 3x - 6

y = $\frac{3}{9} x-\frac{6}{9} =\frac{1}{3} x-\frac{2}{3}$

We see that these two lines are exactly the same, which means that no matter what coordinate works for one, it will work for the other. In other words, there are infinitely many solutions.

And, if you graph these lines, you will get the graph in the second attachment, where they are the same line.

Hope this helps!

5 0

4 years ago

Read 2 more answers