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fenix001 [56]
3 years ago
9

Can someone help me​

Mathematics
2 answers:
kogti [31]3 years ago
4 0

Answer:

B

Step-by-step explanation:

Hoochie [10]3 years ago
3 0

Answer:

C

Step-by-step explanation:

i had the test last year, just looked back on it

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Solve the following system. x2 + y 2= 25 2x + y = 10 The solution set
anzhelika [568]

Answer: {(5,0), (3,4)}

Step-by-step explanation:

You can apply the Substitution method:

- Solve for y from the second equation.

- Substitute into the first equation and solve for x.

Then:

y=10-2x

x^2+y^2=25\\x^2+(10-2x)^2=25\\

(Remember that: (a\±b)^2=a^2\±2ab+b^2)

x^2+(10^2-2(10)(2x)+(2x)^2)=25\\x^2+100-40x+4x^2=25\\5x^2-40x+75=0\\x^2-8x+15=0\\(x-5)(x-3)=0\\\\x=5\\x=3

Substitute the values obtained into one of the original equation and solve for y:

2(5)+y=10\\10+y=10\\y=0\\\\2(3)+y=10\\6+y=10\\y=4

The solution set is: {(5,0), (3,4)}

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3 years ago
Jessica can shoot 10 photos in 10 minutes how may photes can she take in 1 hour
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Answer:

60 photos

Step-by-step explanation:

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Last summer, Jon earned $916 mowing lawns. His brother, Gabe, earned $791 completing chores in the neighborhood. Compare the val
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A cylinder has a diameter of 20cm.
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Answer:

V = 1200π

Step-by-step explanation:

Volume of a cylinder formula:

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Let's find the height of the cylinder by multiplying 20 cm by 3/5.

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The radius is 1/2 of the diameter, so:

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Substitute 12 for h and 10 for r into the volume formula.

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Simplify.

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The volume of a cylinder, in terms of π, is V = 1200π.

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The first one is 6 gallons and the other one you can’t because if josh gets 3 gallons of gas he’s going to have to pay $8.25 but if he gets 4 gallons he’s going to have to pay $11
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