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stiks02 [169]
3 years ago
9

I need help with number 19 thanks

Mathematics
1 answer:
marissa [1.9K]3 years ago
8 0
You were correct with answering Letter B. 
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If cheese is 4.40 per kilogram, what should I pay for 200 grams
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200 grams is is 0.2 kilograms, so you would pay $0.88 because 4.40x0.2=0.88
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3 years ago
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Find the exact value of sin (x-y) if sinx=4/9 and siny=1/4
Svetach [21]

Answer:

sin(x - y) = 0.21

Step-by-step explanation:

we have the sin values which we need to get cos values

sin (A-B) = sin A cos B - sin B cos A

sin² A + cos² A = 1

sin x = 4/9

cos² x = 1 - sin² x = 1 - 16/81 = 65/81

cos² x = 65/81

cos x = √65/9

sin y = 1/4

cos² y = 1 - sin² y = 1 - 1/16 = 15/16

cos² y = 15/16

cos y = √15/4

sin(x − y) = sin x cos y - sin y cos x

sin(x - y) = 4/9 √15/4 - 1/4 √65/9

sin(x - y) = (4√15-√65)/36

sin(x - y) = 0.21

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8 0
2 years ago
Dawson is covering a large cylinder with brown paper. He'll need to find the volume of the cylinder in order to determine how mu
jok3333 [9.3K]
False.

The volume of a cylinder is how much space it takes up INSIDE. You would use volume to measure how much you can put something inside (like water)

Surface area measures the OUTSIDE of a shape. In this case, you'd use surface area to determine how much paper he needs.

~
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3 years ago
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What’s 3•5+-5•4 <br><br> And the dot is multiplication!
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-5 is the answer ...............

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Sterling silver is an alloy of silver that is 92.5% pure silver. If x grams
nlexa [21]

Answer:

D. 0.925x + 0.88y = 0.91(x + y)  

Step-by-step explanation:

The important point to remember is that the total mass of pure silver is the same on each side of the equation.

0.925x = mass of pure silver in first alloy

0.88  y = mass of pure silver in second alloy

The final alloy has a mass of (x + y) g and is 91 % pure silver, so

0.925x + 0.88y = 0.91(x + y)

5 0
3 years ago
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