Step-by-step explanation:
x^2 + 10x = -25
x^2 + 10x + 25 = 0
（x+5)^2=0
x=－5
Answer:
b,c,d,f
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20 times
Here is a chart:
3,13,23,30,31,32,33,34,35,36,37,38,39,43,53,63,73,83,93.
It appears 20 times. Hope this helps!
3x-4y=16
yes, six times a number of n is 6n the greater than or equal ≥ and y plus two is y + 2
