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Rzqust [24]
3 years ago
14

Solve the inequality. d −7 ≤ −3

Mathematics
1 answer:
aleksklad [387]3 years ago
5 0
D-7<span>≤ 3
add 7 to both sides
d</span><span>≤10</span>
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What is the answer for y -1/2 = 3/8y
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Answer:

Y=4/5 or 0.8

Step-by-step explanation:

8y-4=3y

8y-3y=4

5y=4

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Tom could grow potatoes, cabbages, and cauliflower on his farm. However, he has decided to grow only potatoes. What is Tom doing
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He is growing potatoes, probably to sell them
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Answer:

y = 3x

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2 years ago
7. Find the sum or difference.<br> -2(d +1) + (6d +4)
Arturiano [62]

Answer:

Step-by-step explanation:

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-2d + 1 + 6d + 4

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4 0
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

<u>Find the cost</u>

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

3 0
3 years ago
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