4a² + 2ab+362
-a^2- 3ab +62
add them

4a^2+2ab+362 = 2(2a^2+ab+181)

-a^2-3ab+62 = -(3ab+a^2-62)

Step-by-step explanation: For question #1, factor 2 out of 4a^2+2ab+362.

For question #2, factor -1 out of -a^2-3ab+62.

Hope this helps you out.

-Leif Jonsi-

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).