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rewona [7]
2 years ago
13

I need help plz and explination its confusing

Mathematics
1 answer:
Mamont248 [21]2 years ago
3 0

Answer:

12.56

Step-by-step explanation:

The formula for circumference is either πr² πd. Thats basically just multiplying. All you have to do is take the the diameter and multiply it times pi and you get the answer. In some cases they want you to use the radius; radius is diameter divided by 2. Example is if 4 is the diameter 2 is the radius. For this one i did 4 times 3.14(pi).

I hope that helps!

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Ashley is making $500 a week at her job. She receives a 20% pay raise.
tamaranim1 [39]

Answer:

$100 increase

Step-by-step explanation:

500 x 20%

= $100 increase


5 0
2 years ago
Read 2 more answers
Can we obtain a diagonal matrix by multiplying two non-diagonal matrices? give an example
polet [3.4K]
Yes, we can obtain a diagonal matrix by multiplying two non diagonal matrix.

Consider the matrix multiplication below

\left[\begin{array}{cc}a&b\\c&d\end{array}\right]   \left[\begin{array}{cc}e&f\\g&h\end{array}\right] =  \left[\begin{array}{cc}a e+b g&a f+b h\\c e+d g&c f+d h\end{array}\right]

For the product to be a diagonal matrix,

a f + b h = 0 ⇒ a f = -b h
and c e + d g = 0 ⇒ c e = -d g

Consider the following sets of values

a=1, \ \ b=2, \ \ c=3, \ \ d = 4, \ \ e=\frac{1}{3}, \ \ f=-1, \ \ g=-\frac{1}{4}, \ \ h=\frac{1}{2}

The the matrix product becomes:

\left[\begin{array}{cc}1&2\\3&4\end{array}\right] \left[\begin{array}{cc}\frac{1}{3}&-1\\-\frac{1}{4}&\frac{1}{2}\end{array}\right] = \left[\begin{array}{cc}\frac{1}{3}-\frac{1}{2}&-1+1\\1-1&-3+2\end{array}\right]= \left[\begin{array}{cc}-\frac{1}{6}&0\\0&-1\end{array}\right]

Thus, as can be seen we can obtain a diagonal matrix that is a product of non diagonal matrices.
8 0
3 years ago
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Stefan spent half of his weekly allowance on clothes. To earn more money his parents let him wash the car for $5
Alenkasestr [34]
8-5=3 is the remaining half
weekly allowance=2(1÷2) where (1÷2) is 3
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The weekly allowance should be 6.
7 0
2 years ago
(ReallyNeed) 1. Which of the following is equivalent to 5x + 2y = 20?
romanna [79]
1. D
Y=x+4.
That’s the answer
6 0
2 years ago
What is the complete factorization of x2 - 6x + 9?
KatRina [158]

Answer:

C

Step-by-step explanation:

I know because i just took the test

7 0
3 years ago
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