Sam uses 2/3 of a cup of sugar per serving to make 48 cookies. How many cups of sugar does he need to make 288 cookies?
2 answers:
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If the area of a rectangle is width time length, then we have all of the info we need.
the width is 6 less than 3 times the length. let the length be x and put your words into math! 6 less is -6. 3 times a number is 3x, so width=3x-6.
so we have area=l×w which becomes x×(3x-6)=105
solve
factor and solve!
you will get one positive and one negative. pick the positive since lengths cannot be negative
the width is 6 less than 3 times the length. let the length be x and put your words into math! 6 less is -6. 3 times a number is 3x, so width=3x-6.
so we have area=l×w which becomes x×(3x-6)=105
solve
factor and solve!
you will get one positive and one negative. pick the positive since lengths cannot be negative