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3 years ago

How do you know when there are no solutions to a system of equations?

1 answer:

4 0

No solution
========
The lines are parallel
eg
y = 2x + 3; y = 2x + 5

Infinite solutions
============
When one equation reduces to the second one.
2y = 10x + 6
y = 5x + 3 When you divide the first one by 2, you get the second one.

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A student gets 68 marks n therefore gets 85 percent total marks are?

mihalych1998 [28]

Answer:

There are 80 marks in total.

Step-by-step explanation:

Let the number of total marks be $x$ .

The percentage score of the student can be written as the ratio

$\displaystyle \frac{68}{x} = 85\%$ .

However,

$\displaystyle 85\% = \frac{85}{100}$ .

Equating the two:

$\displaystyle \frac{68}{x} = \frac{85}{100}$ .

Cross-multiply (that is: multiple both sides by $100x$ , the product of the two denominators) to get

$85x = 68\times 100$ .

$\displaystyle x = \frac{68\times 100}{85} = 80$ .

In other words, there are 80 marks in total.

4 0

3 years ago

I think the answer is c can someone check me

Katen [24]

Answer:

Step-by-step explanation:

you first have to find the domain by finding where the expression is defined

so the answer would be x>5

6 0

3 years ago

What is (8n^2-26n+20) divided by (n-2)?

Mama L [17]

Answer:

A. 8n-10

Step-by-step explanation:

8n2−26n+20/n−2

=2(4n−5)(n−2)/n−2

=8n−10

7 0

3 years ago

Not sure if it’s A or b help!!!

Sphinxa [80]

The correct answer is A

4 0

3 years ago

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Is 3 a factor of 24s - 167<br> yes<br> no<br><br> HELPPP

Evgen [1.6K]

I dont think so.....

8 0

2 years ago

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