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2 years ago

Solve for r. You must write your answer in fully simplified form. -20 = -15r

Mathematics

1 answer:

nevsk [136]2 years ago

4 0

Answer:

r = 4/3

Step-by-step explanation:

-20 = -15r

Divide both sides by -15.

-20 / -15 = r

The negatives cancel, so

20 / 15 = r

Simplify by taking 5 out of the numerator and denominator. 20/5 = 4, 15/5 = 3.

4 / 3 = r

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HDTV screens usually have a width-to-heigh ratio of 16:9. Which screen dimensions are in the same proportion?

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Answer:

4: 3

Step-by-step explanation:

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2 years ago

2 2/5 multiplied by 2 multiplied by 3 1/5

goldfiish [28.3K]

Answer:

15 9/25

Step-by-step explanation:

1 Convert 2\frac{2}{5}2

to improper fraction. Use this rule: a \frac{b}{c}=\frac{ac+b}{c}a

ac+b

\frac{2\times 5+2}{5}\times 2\times 3\frac{1}{5}

2×5+2

×2×3

2 Simplify 2\times 52×5 to 1010.

\frac{10+2}{5}\times 2\times 3\frac{1}{5}

10+2

×2×3

3 Simplify 10+210+2 to 1212.

\frac{12}{5}\times 2\times 3\frac{1}{5}

×2×3

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

to improper fraction. Use this rule: a \frac{b}{c}=\frac{ac+b}{c}a

ac+b

\frac{12}{5}\times 2\times \frac{3\times 5+1}{5}

×2×

3×5+1

5 Simplify 3\times 53×5 to 1515.

\frac{12}{5}\times 2\times \frac{15+1}{5}

×2×

15+1

6 Simplify 15+115+1 to 1616.

\frac{12}{5}\times 2\times \frac{16}{5}

×2×

7 Use this rule: \frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}

\frac{12\times 2\times 16}{5\times 5}

5×5

12×2×16

8 Simplify 12\times 212×2 to 2424.

\frac{24\times 16}{5\times 5}

5×5

24×16

9 Simplify 24\times 1624×16 to 384384.

\frac{384}{5\times 5}

5×5

384

10 Simplify 5\times 55×5 to 2525.

\frac{384}{25}

384

11 Convert to mixed fraction.

15\frac{9}{25}

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Answer:

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Step-by-step explanation:

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