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KiRa [710]
3 years ago
11

8-4 1/2??????????????????????????????????

Mathematics
1 answer:
Nikolay [14]3 years ago
3 0

Answer:

\frac{7}{2}

Step-by-step explanation:

  1. 4\frac{1}{2} = \frac{9}{2}  
  2. \frac{8}{1} = \frac{16}{2}  
  3. \frac{16}{2} - \frac{9}{2} = \frac{7}{2}  

I hope this helps!

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Which is f(-1) for the function f(x)= 3x^2+9
blsea [12.9K]

Answer:

C.  f(-1) =12

Step-by-step explanation:

f(x)= 3x^2+9

Let x=-1

f(-1) = 3(-1)^2 +9

      = 3(1)+9

      = 3+9

      = 12

f(-1) =12

4 0
3 years ago
Read 2 more answers
Given: A, B, and C What is the value of X in the matrix equation AX + B = C?
Ksju [112]

Answer:

Option (2)

Step-by-step explanation:

Given expression is, AX + B = C

A=\begin{bmatrix}-3 & -4\\ 1 & 0\end{bmatrix}

B=\begin{bmatrix}-7 & -9\\ 4 & -1\end{bmatrix}

C=\begin{bmatrix}-42 & -20\\ 5 & 4\end{bmatrix}

AX + B = C

AX = C - B

C - B = \begin{bmatrix}-42 & -20\\ 5 & 4\end{bmatrix}-\begin{bmatrix}-7 & -9\\ 4 & -1\end{bmatrix} = \begin{bmatrix}-42+7 & -20+9\\ 5-4 & 4+1\end{bmatrix}

C - B = \begin{bmatrix}-35 & -11\\ 1 & 5\end{bmatrix}

Let  X=\begin{bmatrix}a & b\\ c & d\end{bmatrix}

AX = \begin{bmatrix}-3 & -4\\ 1 & 0\end{bmatrix}\times \begin{bmatrix}a & b\\ c & d\end{bmatrix}

     = \begin{bmatrix}(-3a-4c) & (-3b-4d)\\ a & b\end{bmatrix}

Since AX = C - B

\begin{bmatrix}(-3a-4c) & (-3b-4d)\\ a & b\end{bmatrix}=\begin{bmatrix}-35 & -11\\ 1 & 5\end{bmatrix}

Therefore, a = 1, b = 5

(-3a - 4c) = -35

3(1) + 4c = 35

3 + 4c = 35

4c = 32

c = 8

And (-3b - 4d) = -11

3(5) + 4d = 11

4d = -4

d = -1

Therefore, Option (2). X = \begin{bmatrix}1 & 5\\ 8 & -1\end{bmatrix} will be the answer.

7 0
3 years ago
Can some one help me is that correct ?​
Ilia_Sergeevich [38]

Answer:

i think it is..

Step-by-step explanation:

4 0
3 years ago
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maggie spent 4.50 on cheese and fruit at the farmers market. she bought 1/8 pound of apples, 1/4 pound of pears and 1.25 pounds
serious [3.7K]

The produced answer is 5.5


                         hope it helps

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-Dominant- [34]
86.
Fatima has 40
Nora has “6 + (40 x 2)”
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3 years ago
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