Answer:
-3
Step-by-step explanation:
x(-y + z) = -1(-2+5) = -1 · 3 = -3
Answer: the shape is a rectangle
Step-by-step explanation:
Consider the expression 
If h represents the number of hours it takes to repair the computer, then expression 75h represents the amount of money that repairer earns.
The expression 0.09(75h) represents the amount of money for tax Mrs. Bull has to pay. This means that tax makes up 9%.
Answer: first part 0.09(75h) represents the amount of money for tax Mrs. Bull has to pay.
Answer:
There are 46 eggs left
Step-by-step explanation:
18 x 4 = 72 - 26 = 46
Answer:
340
Step-by-step explanation:
The first step is finding the percentage of those who fail within 19 months.
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean
and standard deviation
, the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:

The proportion is the pvalue of Z when X = 19. So



has a pvalue of 0.6808.
Jolt is expected to replace 0.6808 of the connectors sold. Out of 500, that is, on average, 0.6808*500 = 340.
Jolt expects to replace, on average, 340 of the connectors sold.