Check the picture below.
notice, when dividing we have to put the dividend in descending order, now, the cubic, square and single terms are there, but they have a coefficient of 0, as you see in the picture in green, so we add those properly.
Indicate whether the study is an observational study or a controlled experiment. A group of boys is randomly divided into two gr
1 answer:
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Answer:
(a) Mrs. Johnson’s class sold 26 cookies, Mr. Smith’s class sold 27 popcorn.
(b) Mrs. Johnson’s class earned Mr. Smith’s class earned
Hence, Mrs. Johnson’s class earned more.
(c) Mrs. Johnson’s class earned more.
Step-by-step explanation:
Let x be the number of cookies Mrs. Johnson’s class sold and y be the number of popcorn Mr. Smith’s class sold.
(a) If Mrs. Johnson’s class sold x cookies for $2.50 each, then they earn $2.50x. If Mr. Smith’s class sold y popcorn for $1.50 each, then they earn $1.50y. In total, $2.50x+$1.50y=$105.50.
Together, the classes sold 53 items, then x+y=53.
You get the system of two equations:
Solve it
(b) Mrs. Johnson’s class earned Mr. Smith’s class earned
Hence, Mrs. Johnson’s class earned more.
(c) Mrs. Johnson’s class earned more.