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Ahat [919]
3 years ago
12

The equation of a circle is x2+y2+10x−4y−20=0 . What is the radius of the circle?

Mathematics
1 answer:
Shtirlitz [24]3 years ago
5 0

Answer: 7

(I just took the test and it's correct) Hope this helps!

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Please help and look at screenshot
lions [1.4K]

Answer:

-18

Step-by-step explanation:

cus the line is going down

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3 years ago
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What does it mean when it ask hat is the constant of proportionality in pages per hour?
Vinvika [58]
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3 years ago
Use the value of the first integral I to evaluate the two given integrals. I = integral^3_0 (x^3 - 4x)dx = 9/4 A. integral^3_0 (
Troyanec [42]

Answer:

A) -9/2

B) 9/4

C) -9/2, same as A)

Step-by-step explanation:

We are given that I=\int_0^3 x^3-4x dx=9/4. We use the properties of integrals to write the new integrals in terms of I.

A) \int_0^3 8x-2x^3 dx=\int_0^3 -2(x^3-4x) dx=-2\int_0^3 x^3-4x dx=-2I=-9/2. We have used that ∫cf dx=c∫f dx.

B) \int_3^0 4x - x^3 dx=-\int_0^3 (4x-x^3) dx=\int_0^3-(4x-x^3) dx=\int_0^3 x^3-4x dx=I=9/4. Here we used that reversing the limits of integration changes the sign of the integral.

C) It's the same integral in A)

4 0
3 years ago
An excellent swimmer is confident he can judge his speed in the water exactly. He bets he can swim two lengths of a 50-meter Oly
Zolol [24]
(1.5 + x) / 2 = 2 .... multiply both sides by 2
1.5 + x = 2 * 2
1.5 + x = 4
x = 4 - 1.5
x = 2.5 meters per second
7 0
4 years ago
Select the solutions to the system of equations below? Not sure if I have this right. Thanks.
GarryVolchara [31]
The two options you picked are indeed correct.
4 0
3 years ago
Read 2 more answers
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