Which situation could best be represented by this linear equation? 2.75x + 3.25y = 215
2 answers:
Answer:
The correct option 4.
Step-by-step explanation:
The given equation is
.... (1)
Let x is the number of pretzels sold and y is the number of popcorn bags sold.
Total sales is defined as
... (2)
From (1) and (2) it is clear that,
The cost of each pretzel is $2.75 or 275 cents. The cost of each popcorn bag is $3.25 or 325 cents ($1 = 100 cents). Total sales is $215.
Pretzels cost is 50 cents less than popcorn bags. The variable x represents the number of pretzels sold and y represents the number of popcorn bags sold. The total sales was $215.
Therefore the correct option 4.
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Answer: 37
Step-by-step explanation:
Given : Significance level :
Critical value :
margin of error : E= 1 mile per gallon
Population standard deviation: miles per gallon.
We know that when the population standard deviation is known then the formula to find the sample size is given by :
[Round to the next whole number.]
Hence, the required number of automobiles should be used in the test = 37
Answer:
20
Step-by-step explanation:
The midsegment of a trapezoid is calculated as
=
=
= 20