3 years ago

An object travels 4/5 miles in one half hour. what is its speed in miles/ hour

Mathematics

1 answer:

creativ13 [48]3 years ago

6 0

<span>The object's speed is 8/5 miles per hour or 1.6 mph.</span>

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At noon Joyce drove to the lake at 30 miles per hour. but she made the long walk back home at 4 miles per hour. How long did she

mars1129 [50]

Answer:

60 miles

Step-by-step explanation:

let d = distance to the lake

Using: time = distance ÷ speed

Create expressions for the time it takes for each journey:

Drive: $t_1=\dfrac{d}{30}$

Walk: $t_2=\dfrac{d}{4}$

If total time = 17 hours

$\implies t_1+t_2=17$

$\implies \dfrac{d}{30}+\dfrac{d}{4}=17$

$\implies \dfrac{17d}{60}=17$

$\implies 17d=1020$

$\implies d=\dfrac{1020}{17}$

$\implies d=60$

Therefore she walked 60 miles

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2 years ago

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larisa [96]

Answer:

2(3x+4) = 11x-17

6x+8 = 11x-17

25=-5x

x=-5

11x-17

55-17

AC = 38

CD = 38

49-38 = 11

DE = 11

Let me know if this helps!

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3 years ago

Use the reverse tabular method to solve division problem: (x^4+2x^3+2x^2+2x+1)/(x+1)

svetoff [14.1K]

Answer:

x^3 +x^2 +x+1

Step-by-step explanation:

Your welcome!!!!!!!!!!!

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3 years ago

If you had 12 pieces of licorice to share equally among 5 people, how much licorice would each

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12÷5=1.5 of licorice will each person get

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A carpenter needs to cut four sections, each 3–feet 8–inches long, from a piece of molding. If the board is only sold by the foo

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3 feet 8 inches converted to inches is 3x12+8=44inches

44inches times 4 pieces is 176 inches.

176 inches converted back to feet and inches is 176/12=14 feet 8 inches so he would need 15 feet of board

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4 years ago