Answer:
(x - 5)(x + 3)
Step-by-step explanation:
to solve x² - 2x = 15, we need to get all the terms on one side so we can solve the quadratic equation using factoring. to do this, we subtract 15 from both sides
x² - 2x = 15
- 15 -15
x² - 2x - 15 = 0
now we can factor. we need 2 numbers that when multiplied together give us -15, and when those 2 numbers are added together we get -2
because we have a -15, we can assume that one number must be negative and the other positive, as a negative times a postive is a negative.
we can use 3 and -5 as factors and test it out. we put x in front because we have an x²
(x - 5)(x + 3) < we can FOIL to check to see if this is correct. its not mandatory to check but when you arent sure of the answer you can FOIL it out
FOIL stands for: First, Outside, Inside, and Last terms
F: (x - 5)(x + 3) = x²
O: (x - 5)(x + 3) = -3x
I: (x - 5)(x + 3) = 5x
L: (x - 5)(x + 3) = -15
x² + 3x - 5x - 15 < subtract 3x from 5x
x² - 2x - 15
this checks out, so our answer is (x - 5)(x + 3)
Answer:
1 hour 20 minutes
Step-by-step explanation:
The play started at 2:35 PM.
After the play, Jamie talked to her friend for 15 mins and then left the theater at 4:10 PM.
She started talking to her friend once the play was over, hence, to find the time she started talking, we subtract 15 mins from 4:10 PM:
H M
04 : 10
- <u>00 : 15</u>
<u>03 : 55</u>
She started talking around 3:55 PM.
Hence, to find how long the play lasted:
H M
03 : 55
- <u>02 : 35</u>
<u>01 : 20</u>
Hence, the play lasted for 1 hour 20 minutes.
Answer:
n + 8
Step-by-step explanation:
<u>Step 1: Convert words into an expression</u>
The sum of a number and 8
n + 8
Answer: n + 8
To complete the conversion, the following will be gotten:
12880 m
<h3>How to convert distance?</h3>
Using conversion technique,
8 mi / 1 × 1.61 k / 1 mi × 1000m / 1k
we have to cancel out similar units in the numerator and denominator.
Therefore,
8 mi / 1 × 1.61 k / 1 mi × 1000m / 1k
8 / 1 × 1.61 / 1 × 1000m / 1 = 12.88 / 1 × 1000m
Hence,
12.88 / 1 × 1000m = 12880 m
learn more on conversion here: brainly.com/question/16887207
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Answer:
0
Step-by-step explanation:
It may say combine, but it`s subtraction soooo it`s 0.
