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algol13
3 years ago
9

Write the equation of the circle centered at ( - 4,7) with radius 20?

Mathematics
1 answer:
kow [346]3 years ago
8 0

Answer:

(x + 4)² + (y - 7)² = 20²

Step-by-step explanation:

Graphing form

(x - h)² + (y - k)² = r²

(h, k) is the center = (-4, 7)

r is the radius = 20

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

Plug in the givens

(x + 4)² + (y - 7)² = 20²

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Which field has a density of approximately 17000 plants per acre a. 85 acres with 1.02 × 106 plants b. 100 acres with 1.7 x 107
cluponka [151]
A) 85 acres with 1.02 x 10⁶ plants
b) 100 acres with 1.7 x 10⁷ plants
c) 110 acres with 1.9 x 10⁶ plants
d) 205 acres with 3.4 x 10⁵ plants

a) 1.02 x 10⁶ = 1,020,000 ÷ 85 acres = 12000 per acre
b) 1.7 x 10⁷ = 17,000,000 ÷ 100 acres = 170,000 per acre
c) 1.9 x 10⁶ = 1,900,000 ÷ 110 acres = 17,272.73 per acre
d) 3.4 x 10⁵ = 340,000 ÷ 205 acres = 1658.54 per acre

Among the choices, Letter C. 110 acres with 1.9 x 10⁶ plants has the density of approximately 17000 plants per acre. Its actual density is 17,272.73 plants per acre.
4 0
4 years ago
Find the tangent ratio of angle Θ. Clue: Use the slash symbol ( / ) to represent the fraction bar, and enter the fraction with n
max2010maxim [7]

Answer:

15/8

Step-by-step explanation:

tangent =  opposite side over adjacent side.

AB= opposite side 15

BC= hypotenuse 17

CA=adjacent 8

in this case it will be 15/8

7 0
3 years ago
Read 2 more answers
Of all the peppers the chef had 5:7 are red and the rest are green. The chef had a total of 34 green peppers. How many peppers d
Ivenika [448]
5*7=35 35+34=69. multiply 5 and 7 and add your answer to the green peppers and thats the total of the peppers
5 0
3 years ago
Solve log x=2. A. 2 B. 20 C. 100 D. 1,000
Ber [7]

Answer:

100

Step-by-step explanation:

5 0
3 years ago
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The range of all real numbers x such that 2x − 5 < 7 and 4x + 10 > 6 is
hammer [34]
2x - 5 < 7
2x = 12
x = 6

4x + 10 > 6
4x = - 4
x = - 1

( - 1 , 6 )

i am a mathematics teacher. if anything to ask please pm me
5 0
3 years ago
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