X+7.4=49.8
-7.4 -7.4
x=49.8-7.4
x= 42.4
Solution: We are given:
We know that a usual values of the test scores falls within 2 standard deviation from the mean.
Therefore, the minimum usual test score is:
The maximum usual test score is:
Therefore, the minimum and maximum “usual” values of the test scores are:
65.4 and 90.6
Answer:
10a+b+9c
Step-by-step explanation:
first you have to join the like terms then you add them then you write the answer, I hope you understood
9c+5a+5a+b
9c+10a+b
10a+b+9c
Answer:
- 32, 4, 20, and - 36
Step-by-step explanation:
We have to find the product of -4 with 8 / - 1 / - 5 / 9.
Now, the product of - 4 and 8 is = - 32
{Since the product of a positive number and a negative number is always negative}
The product of - 4 and -1 is = 4
{Since the product of two negative numbers is always positive}
The product of - 4 and - 5 is = 20
The product of - 4 and 9 is = -36
(Answer)
I only know this way sorry
20=5 (-3+x)
20=-15+5x
+15. +15
_________
35=5x
__ __
5. 5
7=x
