What is the missing number that makes the equation true? Enter your answer in the box.
29 + 20 = 15 + 11 + ?

The missing number that makes the equation true is 23.

Step-by-step explanation:

29 + 20 = 15 + 11 +?

First, add 29 and 20. The sum is 49.

49 = 15 + 11 + ?

Next, add 15 and 11. The sum is 26.

49 = 26 + ?

Now, subtract 26 from 49. The difference is 23.

49 = 26 + 23

This is all that you technically need to do, but you can go ahead and add 26 and 23 if you'd like. This will give you a sum of 49 as well.

49 = 49

Hence, the missing number is 23.

i those same problems in math and dont know how to do them

1. when "a" is a root of a polynomial, (x -a) is a factor of it. for the three roots given, the factors of the desired polynomial are (x +2)(x -1/2)(x -3).

in order to make the leading coefficient be negative, we need to multiply this product by a negative number. any negative number will do, but we choose a small (magnitude) value that will eliminate the fraction: -2.

then

f(x) = -2(x +2)(x -1/2)(x -3) = -(x +2)(2x -1)(x -3)

= -(2x² +3x -2)(x -3)

= -(2x³ -3x² -11x +6)

f(x) = -2x³ +3x² +11x -6

2. a graph created by the desmos on-line graphing calculator is shown, and the zeros are highlighted.

3. as indicated in part 1, the multiplier of this equation can be anything and the zeros will remain the same. you want a negative leading coefficient, so the "anything" is restricted to any of the infinite number of numbers that will make that be the case.