Answer:
55 decrease by 5 is 50, or 55 - 5 = 50.
Step-by-step explanation:
Let x represent the missing number.
When you hear the words decrease, minus, that tells you to subtract.
Before we subtract, if there is a variable, we must do the opposite of subtraction, we need to add.
50 + 5 = x
Which means x = 50 + 5.
50 + 5 = 55.
Therefore, x = 55.
You can tell which animal is faster by pacing
8-3=5 or 8-5=3
Is that what your looking for?
PQ peependicular to PS
Thus angle QPS = 90⁰

7x - 9 + 4x + 22 = 90⁰
11x = 77
x = 7
Thus angle QPR = 7(7) - 9 = 40⁰