3 years ago

Pleassdee need help I'll brainlist

Mathematics

2 answers:

il63 [147K]3 years ago

6 0

A) a^2 means a*a

B) substitute 5 for a on i, ii, and iii problems

NikAS [45]3 years ago

5 0

Answer:

A^2 means a*a

Step-by-step explanation:

A^2 = 5^2=5*5=25

3a^2=3*5^2=3*25=75

A^2+7=5^2+7=25+7=32

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If f(x)=4x^2+1 and g(x)=x^2-5 find(f+g)(x)

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Answer:

$\large\boxed{(f+g)(x)=5x^2+6}$

Step-by-step explanation:

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Which matrix equation represents the system of equations?<br><br> {-x+ 2y = 0 <br> y= -2

Snowcat [4.5K]

We are given a system of equations,

$\begin{cases}-x+2y=0\\y=-2\\ \end{cases}$

This will translate into a 2x2 matrix of coefficients (because 2 equations and 2 unknowns),

$\begin{bmatrix}-1&2\\0&1\\ \end{bmatrix}$

The matrix will then be applied to the vector (lower dimensions on top),

$\begin{bmatrix}x\\y\\ \end{bmatrix}$

And the result vector will be whats on the other side of equals sign,

$\begin{bmatrix}0\\-2\\ \end{bmatrix}$

So to put everything together,

$\begin{bmatrix}-1&2\\0&1\\ \end{bmatrix}\begin{bmatrix}x\\y\\ \end{bmatrix}=\begin{bmatrix}0\\-2\\ \end{bmatrix}$

Hope this helps :)

6 0

3 years ago

Pleassdee need help I'll brainlist ​

Pleassdee need help I'll brainlist