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Lesechka [4]
3 years ago
9

What is the equation of a circle centered at the origin with radius 15?

Mathematics
2 answers:
kotykmax [81]3 years ago
7 0

Answer:

x² + y² = 225

Step-by-step explanation:

The equation of a circle centred at the origin is

x² + y² = r² ( where r is the radius )

here r = 15, hence

x² + y² = 15²

x² + y² = 225 ← equation of circle


Veseljchak [2.6K]3 years ago
5 0

Answer:

x^2 + y^2 = 225.

Step-by-step explanation:

The general form is x^2 + y^2 = r^2    where r = the radius of the circle.

The radius is 15 so the equation is x^2 + y^2 = 15^2.

That is x^2 + y^2 = 225.

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3 years ago
Tamar has four more quarters than dimes. If he has a total of $1.70, how many quarters
erma4kov [3.2K]
<h3>Answers:</h3><h3>6 quarters</h3><h3>2 dimes</h3>

================================================

Work Shown:

d = number of dimes

q = number of quarters

q = d+4 since she has 4 more quarters than dimes

$1.70 = 170 cents

10d = value of all the dimes in cents

25q = value of all the quarters in cents

10d+25q = total value of all the coins in cents

10d+25q = 170

10d+25( q ) = 170

10d+25( d+4 ) = 170 .... plug in q = d+4

10d+25d+100 = 170 .... distribute

35d+100 = 170

35d = 170-100 ..... subtract 100 from both sides

35d = 70

d = 70/35 ... divide both sides by 35

d = 2

He has 2 dimes

q = d+4

q = 2+4

q = 6

He also has 6 quarters

------------------

Check:

1 dime = 10 cents

2 dimes = 20 cents ..... multiply both sides by 2

1 quarter = 25 cents

6 quarters = 150 cents ..... multiply both sides by 6

(2 dimes) + (6 quarters) = (20 cents) + (150 cents) = 170 cents

This confirms the answers.

5 0
3 years ago
Allison owns a food truck that sells tacos and burritos. She only has enough ingredients to make 98 tacos or burritos.Write an i
leonid [27]

Answer:

98=49bb+49tt

Explain:

so u have the same amount of both

7 0
3 years ago
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