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lukranit [14]
2 years ago
9

There are 75 students in classes A and B altogether. There are 61 students in classes A and C altogether. The ratio of the numbe

r of students in Class B to Class C is 5:3. How many students are there in Class A?
Mathematics
2 answers:
morpeh [17]2 years ago
6 0

Answer:

A = 40

Step-by-step explanation:

A+B = 75

A+C = 61

Subtract

A+B = 75

-A-C = -61

----------------------

B-C = 14

B:C

5:3

for every 5B there are 3C

Replace B with 5/3 C

5/3C-C = 14

2/3C = 14

C = 21

A+C = 61

A +21 = 61

A = 40

Bezzdna [24]2 years ago
3 0

Answer:

40

Step-by-step explanation:

A +  B=75

A + C = 61

B = 5/3 *C

A+C * 5/3 = 75 then we got the answer

You might be interested in
Identify the geometric mean of 8 and 20 in simplest radical form.
Temka [501]

Answer:

8/x = x/20

x^2=160

x=sqrt(160)

x=sqrt(16*10)

x=sqrt(16)*sqrt(10)

x=4*sqrt(10)

Step-by-step explanation:

4 0
1 year ago
At the end of year X, automobile installment credit accounted for 36 percent of all outstanding consumer installment credit. At
murzikaleks [220]

Answer:

option (c) 475

Step-by-step explanation:

let the automobile installment credit be 'C'

Given:.

Automobile installment credit accounted for 36 percent of all outstanding consumer installment credit

Now,

57 billion is \frac{1}{3} of automobile installment credit

or

57 billion = \frac{1}{3} × C

or

C = 57 × 3

or

C = 171 billion

now,

installment credit accounted = 36% of all outstanding consumer installment credit

or

171 billion = 0.36 × all outstanding consumer installment credit

or

All outstanding consumer installment credit = $475 billion

Hence, the correct answer is option (c) 475

4 0
3 years ago
Calculate the new balance using the previous balance method. Previous balance = $34.80 Finance charge = $0.75 New purchases = $8
pychu [463]
<h3>Given</h3>

new balance = previous balance + finance charge + purchases - payments

previous balance = $34.80

finance charge = $0.75

purchases = $83.21

payments = $5.50

<h3>Find</h3>

new balance

<h3>Solution</h3>

Fill in the given information and do the arithmetic.

... new balance = previous balance + finance charge + purchases - payments

... new balance = $34.80 + 0.75 + 83.21 - 5.50

... new balance = $113.26 . . . . matches the 2nd choice

7 0
3 years ago
Pleaze Help! Due in 15 min!!!! Will give Brainliest to first correct answer to show steps!
Grace [21]
Your answer is5x^4 * sqrt 3x
4 0
2 years ago
What's an equivalent expression to 4(c+9)
sineoko [7]
4c + 36 because you have to multiple 4 x c which is 4c and then you have to multiply 4 by 9 which gives 4c + 36 (hope this helps)
6 0
2 years ago
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