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AnnyKZ [126]
3 years ago
5

Instructions:Select the correct answer.

Mathematics
2 answers:
wel3 years ago
8 0
The correct answer is A here is the math
12+ (3/4x) = 393/4x = 39 -12(4/3)(3/4) = 27 (4/3)x = 36
Luba_88 [7]3 years ago
3 0

Answer: The things that we know in this problem are:

"the number of postcards is 12 more than 3/4 of the number of stamps"

This means that if P is the number of postcards, and S the number of stamps, then:

P - (3/4)S = 12

And we also know that P = 39

39 - (3/4)S = 12

(3/4)S =39 - 12 = 27

S = (4/3)*27 = 36

So he has 36 stamps.

then the correct answer is A.

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juan and debbie each earn 9 per hour at their "jobs." Debbie worked five hours more than juan during the week. if juan and debbi
Vaselesa [24]

Using a system of equations, it is found that Debbie worked 45 hours during the week.

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

In this problem, the variables are:

  • Variable x: Amount of hours worked by Juan.
  • Variable y: Amount of hours worked by Debbie.

Juan and Debbie each earn 9 per hour at their "jobs", and earned a total of 765 for the week, hence:

9x + 9y = 765

Simplifying the expression by 9:

x + y = 85 -> x = 85 - y.

Debbie worked five hours more than juan during the week, hence:

y = x + 5.

Since x = 85 - y, we replace in the expression:

y = 85 - y + 5.

2y = 90.

y = 45.

Debbie worked 45 hours during the week.

More can be learned about a system of equations at brainly.com/question/24342899

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2 years ago
One side of a triangle is two times the second side. The third side is 5 feet longer than the second side. The perimeter of a tr
Sphinxa [80]
Second side= x
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Write a linear equation with a slope of 14 and y-intercept -12.
Vanyuwa [196]

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Step-by-step explanation:

in the standard format y=mx+b, m is the slope and b is the y-intercept, so this equation would be y=14x-12 since the slope is 14 and the y-intercept is -12.

8 0
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