Answer:
21 and 30
Step-by-step explanation:
x + y = 51
x - y = 9
add the two equations and y's will cancel out
2x = 42 divide by 2
x = 21 so put 21 in for x in the top equation and solve
21 + y = 51
y = 30
Store pays ($3)
Store sells it for ($5.70)
The percent is always (100%) when there selling it.
markup= $3 ÷ $5.70 · 100% = 1.9
Answer:
Step-by-step explanation:
Given expression,
By distributive property,
Again by distributive property,
Combining like terms,
Which is required product.
Answer:
Step-by-step explanation:
There is no information about proportion estimate, so p = 0.50
Sample size formula is Z^2 * p( 1 - p) / E^2
E - margin of error = 10%
Sample size = 2.0537^2 * 0.50 * 0.50 / 0.10^2
= 105.44
Sample size is approximately 106
Well first we need to determine what each choices ( mean, median, mode, interquartile range) means.
Mean- average of a set of numbers
Median - middle number of a set of numbers
Mode- number that appears the most in a set of numbers
Interquartile range- find median of set of numbers and separate the set into 3 equal sections total. Subtract the 3rd section from the 1st section. So you can find the range or span of numbers.
If you want to build an elevator that can hold a maximum of 1,500 pounds, i think the most important fact you need to know about weight is the average weight that all the people weighs so you can know what to expect<span />
