Chanselor2743
31.10.2019 •
Mathematics
On a sixth-grade math test,there are 32 questions.multiple-choice questions make up 25% of the test.how many questions on the test are multiple-choice?
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Ответ:
9514 1404 393
bed frame: 14 hoursbookcase: 4 hourschair: 6 hoursStep-by-step explanation:
Perhaps you want to know how many hours it takes to build each item.
If we let f, b, c represent the number of hours for a frame, bookcase, and chair, respectively, the equations can be written as ...
4f +b +3c = 786f +0b +4c = 1083f +5b +2c = 74Your graphing calculator or an on-line matrix solver can find the reduced row-echelon form of the augmented matrix ...
That result will tell you ...
(f, b, c) = (14, 4, 6)
It takes 14 hours to build a bed frame, 4 hours to build a bookcase, and 6 hours to build a chair.