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2 years ago

Dave and ryan share some money in the ratio 7 : 4 . dave got $28, how much did ryan get?

Mathematics

2 answers:

Nana76 [90]2 years ago

5 0

Answer:

Step-by-step explanation:

let money ryan gets be x

7/4=28/x(do cross multiplication)

28*4=7x

112=7x

112/7=x

16=x

therefore ryan gets $16

Ronch [10]2 years ago

3 0

Answer:

$16

Step-by-step explanation:

28/7=4

4*4=16

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3(x-4) + 2x - y2 for x = 5

Alborosie

Answer:

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Step-by-step explanation:

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2 years ago

A projectile is launched upward from a height of 704 feet with an initial velocity of 112 ft/s. The equation gives the height h

Feliz [49]

We are given the data ho equal to 704 feet and vo equal to 112 feet per second. We apply then kinematics equation: h = ho + vot - 1/2 gt2. Substituting to the given equation,
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3 years ago

"a u.S. 1-cent coin (a penny) has a diameter of 19 mm and a thickness of 1.5 mm". Assume the coin is made of pure copper, whose

choli [55]

<u>the question is </u> Calculate the value of the copper in the coin

Step 1

Find the volume of the coin

we know that

the volume of a cylinder is equal to

$V=\pi r^{2}h$

where

r is the radius of the coin

h is the thickness of the coin

in this problem we have

Diameter=19 mm=1.9 cm

r=D/2------> r=1.9/2=0.95 cm

h=1.5 mm=0.15 cm

substitute the values in the formula

$V=\pi*0.95^{2}*0.15=0.425\ cm^{3}$

Step 2

<u>Find the mass of copper in the coin</u>

we know that

the density is equal to

$Density=mass/volume$

Solve for the mass

$mass=Density*volume$

we have

$Density=8.9\ gr/cm^{3}\\Volume=0.425\ cm^{3}$

substitute in the formula

$mass=8.9*0.425=3.785\ gr$

Step 3

we know that

the market price of the copper is $2.15 per pound

1 pound=453.592 grams

convert gram to pounds

3.785 gr=3.785/453.592=0.0083 pounds

0.0083*$2.15=$0.018=$0.02

therefore

<u>the answer is</u>

$0.02

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3 years ago

Which of the matrixes can be added together? Choose all that apply.

katen-ka-za [31]

<h3>Answer: A and C</h3>

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2 years ago

How can you tell if a graph is proportional

marissa [1.9K]

Answer:

The fractions you make from the coordinates on the graph is equal. If it is then the graph is proportional

Hope this helped

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2 years ago

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