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3 years ago

Sand costs three times as much as rocks per pound. If sand is $9.60 per pound, how much are rocks per pound?

Mathematics

1 answer:

REY [17]3 years ago

8 0

Answer:

Rock costs $3.20 per pound.

Step-by-step explanation:

Because sand costs three times as much as rocks per pound, you can determine the cost of rocks per pound by dividing the cost of sand per pound by three:

$\frac{9.60}{3}$ $= 3.20$

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Answer:

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Step-by-step explanation:

$x = \frac{ - b + - \sqrt{b {}^{2} - 4ac } }{2a}$

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2 years ago

On a number line, the coordinates of X, Y, Z, and W are negative 7, negative 4, 3, and 7, respectively. Find the lengths

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2 years ago

What is the volume of the rectangular prism below in cubic inches?

lions [1.4K]

Answer:

Step-by-step explanation:

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1 year ago

Distance between the two points -6,8 and -1,-4

Tresset [83]

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Step-by-step explanation:

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3 years ago

Two automobiles leave the same city simultaneously and both head towards another city. The speed of one is 10 km/hour greater th

Veronika [31]

Answer:

5091 Km/hr and 505 km/hr

Step-by-step explanation:

Speed = Distance / Time

Let the speed of first automobile be 'x' and that of the second be 'y'

Since speed of one is 10 times greater than the other. therefore;

⇒ x = 10 y

also let time for faster automobile be 'T' and time for slower auto mobile be 't'

Since first arrive one hour earlier than second, therefore;

⇒ t = T + 1

⇒ For first automobile; $x X T = 560$ ; substituting for 'x' and 'T'. Therefore;

⇒ $10y (t+1) = 560$

⇒ For Second automobile; $y X t = 560$

⇒ $y = \frac{560}{t}$

⇒ $10(\frac{560}{t})(t + 1) = 560$

⇒ 5600 + $\frac{5600}{t}$ = 560

⇒ 5600 - 560 = - $\frac{5600}{t}$

⇒ t = 1.11 hr

also ; T = 1.11 - 1 = 0.11 hr

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2 years ago