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slamgirl [31]
2 years ago
13

14.

Mathematics
2 answers:
stepan [7]2 years ago
5 0

Answer:

D. \mathrm{1\frac{1}{2}\:hours}

Step-by-step explanation:

As it asks how many more, it means plus, plus means addition. So, let find the difference between the two fractions.

This week should be at first, and last week should be after the minus sign.

5\frac{1}{4} - 3\frac{3}{4}

\mathrm{Convert\:mixed\:numbers\:to\:improper\:fraction}

5\frac{1}{4} = 4\times5=20+1=21\\\\\frac{21}{4} \\\\3\frac{3}{4} = 4\times3=12+3=15\\\\\frac{15}{4}

\frac{21}{4} - \frac{15}{4}

\mathrm{Subtract\: the\: numerators,\: not \:the \:denominators.}

\frac{21}{4} - \frac{15}{4}\\\\21-15=6

\frac{6}{4} \\\\\mathrm{\underline{Simplify:}}\: \bold{1\frac{1}{2}}

hoa [83]2 years ago
3 0
D
You subtract 5 1/4 (5.25) - 3 3/4 (3.75) = 1 1/2 (1.5)
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