I got no solution i might be wrong tho
Answer:
185 when we subtract 212-127 it gives 185 thanks for the seeing image
Step-by-step explanation:
Lets first understand what each of these properties are.
- Commutative property - an operation is commutative if changing the order of the operands does not change the result
- Associative property - an operation is associative if grouping the operands with parenthesis does not change the result
- Additive identity property - this property says that when you add 0 to a real number, or add a real number to 0, the result is the same real number
- Additive inverse property - the additive inverse of a number is the number required to add to make the result 0
Problem 1
This is an example of the additive inverse property because -2 + 2 = 0.
Problem 2
This is an example of the associative property because the numbers are grouped differently, but still equal each other.
Problem 3
This is an example of the commutative property because the numbers are arranged differently but still equal each other.
Part a: For variable X using z score you have (x-30)/10, replace X for this expression in (a), i mean Z=2+10((x-30)/10) = 2+x-30= put this in the way of z score = (x-18)/1, so the mean is 18 and standard deviation is 1.
Part b: Z=X+Y= (x-30)/10 + (x-20)/8 = solve adding fractions = (18x-440)/80 now divide all the numbers between 18 (because you need to show as z score way) = (x-24.4)/4.4, so the mean is 24.4 and standard deviation is 4.4.
For part c,do the same.
Answer: after 3 seconds
when the ball hit the ground => - 5t² + 14t + 3 = 0
⇔ (5t + 1)(t - 3) = 0
⇔ t = 3 or t = -1/5
but t is a positive integer => t = 3
so the ball will hit the ground after 3 seconds
Step-by-step explanation:
