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sergey [27]
2 years ago
9

Last year 80 students signed up for a summer trip to Washington, D.C. This summer 50 students have signed up to go. What is the

percent decrease in the number of students?
A 30%
B 37.5%
C 60%
D 62.5%
i will mark brainliest
Mathematics
1 answer:
Fynjy0 [20]2 years ago
7 0

Given:

Last year 80 students signed up for a summer trip to Washington, D.C.

This summer 50 students have signed up to go.

To find:

The percent decrease in the number of students.

Solution:

We have,

Students in last year = 80

Students in this year = 50

Now,

\text{Decrease}\%=\dfrac{\text{Students in last year - Students in this year }}{\text{Students in last year }}\times 100

\text{Decrease}\%=\dfrac{80-50}{80}\times 100

\text{Decrease}\%=\dfrac{30}{80}\times 100

\text{Decrease}\%=\dfrac{3}{8}\times 100

\text{Decrease}\%=37.5

Therefore, the correct option is B.

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Answer:

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Step-by-step explanation:

Let's solve this via elimination method:

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By subtracting equation 2 from equation one we obtain:

\begin{cases} x+y=5\\-(x-y=1)\end{cases}\\\\0x+2y=4\\\\y=2

Next we can use any equation either 1 or 2 to determine what x is, I'll use equation 1.  Let y=2 and so:

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Explanation:

<u>1. Given equation:</u>

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<u>2. Given intensity:</u>

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No solution

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What is the value of x?<br><br> What is the value of y?
Rudik [331]

Answer:

Y= 20

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Step-by-step explanation:

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