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rosijanka [135]
3 years ago
10

Which of the following is the equation of a circle with center (6,−7) and diameter 22?

Mathematics
1 answer:
barxatty [35]3 years ago
8 0
(X-6)²+(y+7)²=121 , flip the signs of the coordinates and the last number is the radius squared
You might be interested in
John goes running every morning. He can run 3 miles in 1 hour. How many miles would he be able to run in 1 and ½ hours?
sp2606 [1]

Answer:

4.5 or 4 1/2 miles

Step-by-step explanation:

\dfrac{3\text{ miles}}{\text{hour}}\cdot 1.5 \text{ hours}= 3\cdot 1.5=4.5

Hope this helps!

5 0
3 years ago
Ali ran 3/10 km before school after school she ran 1/5 km
miss Akunina [59]

Answer:

1/2 km

Step-by-step explanation:

3/10 + 1/5, find common denominators

3/10 + 2/10 = 5/10, simplify

1/2 km

8 0
3 years ago
A box of cereal states that there are 84 cal in a 3/4 cup serving what is the unit rate for calories per cup how many calories a
Tamiku [17]

Answer:

first question is 112, second is 336

Step-by-step explanation:

you only need to do is 84÷3/4=112calories

this is one box of cereal state if you want three

box calories just 3×112

3 0
3 years ago
Use a matrix to solve the system:
Romashka-Z-Leto [24]

Answer:

(2.83 , 1 , 4)

Step-by-step explanation:

2x+2y-z=4\\4x-2y-2z=2\\3x+3y-4z=-4\\

Rewrite these equations in matrix form

\left[\begin{array}{ccc}2&2&-1\\4&-2&-2\\3&3&-4\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right]=\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\

we can write it like this,

AX=B\\X=A^{-1}B

so to solve it we need to take the inverse of the 3 x 3 matrix A then multiply it by B.

We get the inverse of matrix A,

A^{-1}=\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right]  \\

now multiply the matrix with B

X=A^{-1}B\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right]\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}2.83\\1\\4\end{array}\right] \\

4 0
2 years ago
The complement of an angle is 81° what is the measure of the angle
Fiesta28 [93]
9°, complementary angles always add up to 90°
5 0
3 years ago
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