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3 years ago

Pease help me ASAP....................

Mathematics

2 answers:

Rasek [7]3 years ago

5 0

A.
$-5 +5(x+4)\\ -5 +5x+20\\ 5x+15$

b.
$3m+2(5m-7)\\ 3m+10m-14\\ 13m-14$

c.
$4(6t+9)-10t\\ 24t+36-10t\\ 14t+36$

d.
$8k-6(3-2k)\\ 8k-18+12k\\ 20k-18$

AfilCa [17]3 years ago

3 0

First one, x+4

second one, 13m-7

third one, 14x+36

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2 years ago

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3 years ago

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2 years ago

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2 years ago

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prisoha [69]

For this case we must simplify the following expression:

$1 \frac {1} {3}$ ÷ $\frac {1} {4}$ + $\frac {2} {5}$ ÷ $\frac {1} {4}$ + $\frac {4} {15}$ ÷ $\frac {1 }{4}$

We convert mixed numbers to improper fractions:

$\frac {3 * 1 + 1} {3}$ ÷ $\frac {1} {4}$ + $\frac {2} {5}$ ÷ $\frac {1} {4}$ + $\frac {4} {15}$ ÷ $\frac {1} {4}$ =

$\frac {4} {3}$ ÷ $\frac {1} {4}$ + $\frac {2} {5}$ ÷ $\frac {1} {4}$ + $\frac {4} {15}$ ÷ $\frac {1} {4}$ =

We first solve the divisions:

$\frac {\frac {4} {3}} {\frac {1} {4}} + \frac {\frac {2} {5}} {\frac {1} {4}} + \frac {\frac {4} {15}} {\frac {1} {4}} =\\\frac {4 * 4} {3 * 1} + \frac {4 * 2} {5 * 1} + \frac {4 * 4} {15 * 1} =\\\frac {16} {3} + \frac {8} {5} + \frac {16} {15} =$

We rewrite the fractions:

$\frac {16 * 5} {3 * 5} + \frac {8 * 3} {5 * 3} + \frac {16} {15} =\\\frac {80} {15} + \frac {24} {15} + \frac {16} {15} =\\\frac {80 + 24 + 16} {15} =\\\frac {120} {15} =\\\frac {24} {3} =\\8$

Answer:

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2 years ago