What is the value of any fraction with 0 in the denominator

Answers

Answer 1

Answer: Dividing by zero is undefined. So, the answer would technically be zero. You CANNOT divide any number by zero, so fractions with 0 in the denominator are undefined. Hope this helps!!

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A student got an 85% on his test . If he got 12 questions wrong , how many questions were on the test?

Answers

Answer:

80 questions

Step-by-step explanation:

Given that a student received an 85% grade on his test, and that he got 12 questions wrong:

We could infer that if he answered all of the test questions correctly, then he would have received a perfect score of 100% on his test.

Since he got 12 questions wrong, then it means that those wrong answers account for the 15% out of receiving a 100% grade on his test (or: 100% - 85% = 15%).

Let x = number of test questions

In order to find how many questions were on his test:

12 questions = 15% (or 0.15) of the total number of questions (x)

12 questions = 0.15x

Divide both sides by 0.15 to isolate x:

$\displaystyle\mathsf{(12\:questions)/(0.15)\:=\:(0.15x)/(0.15)}$

x = 80 questions

Therefore, there were 80 questions on his test.

Cuantos pedazos de cinta de 1/4 de metro se pueden obtener de un rollo de cinta que mide 15/2? 30 pedazos.
60 pedazos.
15 pedazos.
45 pedazos.

Answers

Answer:

30 pedazos

Step-by-step explanation:

(15/2)/(1/4)

= (15*4)/(2*1)

= 60/2

= 30

Given that
5x:8 = 7:2

Calculate the value of x.

Answers

Answer:

$x = 5.6$

Step-by-step explanation:

$5x : 8 = 7 : 2 \n (5x)/(8) = (7)/(2) \n \n cross \: \: multiple \n 10x = 8 * 7 \n 10x = 56 \n (10x)/(10) = (56)/(10) \n x = 5.6$

Answer:

x = 28/5 = 5.600

If x represents the number of hours machine X runs and y represents the number of hours machine Y runs, what is the objective function: "c = xy"?

Answers

Answer: Here's my answer

Step-by-step explanation:

The objective function given, "c = xy", represents the cost (c) associated with the operation of machine X and machine Y, where x represents the number of hours machine X runs and y represents the number of hours machine Y runs.

To understand the objective function, let's break it down step by step:

1. "c" represents the cost associated with the operation of the machines. This could include expenses such as maintenance, energy consumption, or labor costs.

2. "x" represents the number of hours machine X runs. This indicates the duration for which machine X is in operation.

3. "y" represents the number of hours machine Y runs. This indicates the duration for which machine Y is in operation.

4. The objective function "c = xy" states that the cost (c) is calculated by multiplying the number of hours machine X runs (x) by the number of hours machine Y runs (y). This means that the total cost is proportional to the product of the hours of operation for both machines.

For example, if machine X runs for 5 hours (x = 5) and machine Y runs for 3 hours (y = 3), the cost (c) would be calculated as follows:

c = xy

c = 5 * 3

c = 15

In this case, the cost (c) would be 15, representing the total cost associated with the operation of both machines for the given hours.

Therefore, the objective function "c = xy" calculates the cost based on the product of the hours of operation for machine X and machine Y.

P(2,7) Q(-2,-7)
I’m confused on how the answer ended up being 2 square root 53