Answer:
-10
Step-by-step explanation:
8 - 2x^2 =
= 8 - 2(-3)^2
= 8 - 2(9)
= 8 - 18
= -10
the temperature differential is based on the numbers on a line with the negative numbers left of zero and the positive numbers right of zero.
Using -12 on the number line, add 25 to it to get the noon temperature tomorrow.
Awnser -12 + 25 = 13
The temperature tomorrow at noon will be 13 degrees.
Questions?
Answer:
12/(7-4) + 5 * 3 = 19
Step-by-step explanation:
Given
Untrue Expression: 12 ( 7 − 4 ) + 5 3 = 19
Signs: +−×÷
Required
Use the given signs to make the equation true.
To solve this, the trial and error method will be adopted.
The trial and error method involves trying series of sign combinations in the given expression; whichever works is the right answer.
So, after few attempts the following makes the equation true
12/(7-4) + 5 * 3 = 19
To check if it's true or not; we simply expand the expression on the left hand side. This gives
12/3 + 5 * 3 = 19
4 + 5 * 3 = 19
4 + 15 = 19
19 = 19.
Hence, the sign combinations used in 12/(7-4) + 5 * 3 = 19 is correct.
