Answer:
Step-by-step explanation:
To determine for which value of x a pair of expressions will be equal, we will need to set them equal to each other and then solve for x.
First, we can add 4 to each side
Now we can subtract 2x from each side
Now, just to check our answer, we can plug in our answer back into the original equation to see whether we get the same result for each side
Answer:
56 problems
Step-by-step explanation:
So we already know that the answer is: 56. However, a good help is knowing how to obtain this answer from the data provided.
Tony's quiz had 80 questions
Tony correctly answered 70% of them.
We can always write a percentage amount as a ratio by dividing the amount by 100.
.
This means that for every 100 questions, tony will respond correctly 70.
So, if Toni did a questionnaire of n questions, the amount that will answer correctly is calculated by the following expression:
If then:
The given expression can be written as = (q+8)(q+4).
Step-by-step explanation:
Given,
To make it a complete square.
Formula
(a+b)² =
Now,
=
= (q+6)²-36+32
= (q+6)²-4
= (q+6)²-2²
= (q+6+2)(q+6-2)
= (q+8)(q+4)