The answer is 15. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
The answers are 5 26 -1.
10 + 10 + 10 + 5 + 5 +1 = 41.
One method is (10×4)+(5×3) = 55 (or mentally add up from left to right).
30 + 10 + 5 + 5 = 50
5+5=10 5+5=10 10+10+5=25 so the answer is not 20, it is 25 or 5*5
25 as 10+10 is 20 plus 5 is 25
x² + 5x + 10 = 0 What two numbers multiply to get 10 and add to get 5? (1,10)? (2,5)? No. There are none, so go to the quadratic formula to get the answers. (-b±√(b²-4ac))/2a (-5±√(25-40))/2 {{Uh-oh. Negative determinant, so no real answers at all.}} (-5±√-15)/2 Answers are (-2.5 + 1.9365i) and (-2.5 - 1.9365i) ■
165
true
5 plus 5 would equal 10
25
-10 + 5 = -5