Answer:
-2x-2y
Step-by-step explanation:
(-5x+4y) - (-3x+6y)
Remove unnecessary parentheses
-5x+4y - (-3x+6y)
When there is a - infront of an expression in parentheses change the sign of each term in the expression
-5x+4y+3x-6y
Colllect all like terms
-2x+4y-6y
-2x-2y
So x and y are supplementary because the angle beside X is 90º so all together it’s 180º
And each side should add up to 90º
So x and y should each be 45º if I’m not mistaken, and then z is (I forgot the proper vocab term for this) right flippity across y so it should also be 45º
I think the boxes must be filled with
1/3 and -1/5.
If you have a discount on an item..
ex. 15% off coupon for $20 shirt
20 x 0.15= $3 <--- 15% of 20
20-3=$17 <--- final price of shirt after coupon
Answer:
The desired z-score is 2.
Step-by-step explanation:
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean
and standard deviation
, the z-score of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
n(12,2.5)
This means that 
z score when x =17
This is Z when X = 17. So



The desired z-score is 2.