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3 years ago

7

Chris spent a total of $53.07 buying art supplies. He bought a package of drawing paper for $24.75, and bought 12 brushes. What

was the price per brush?

1 answer:

Sergeeva-Olga [200]3 years ago

3 0

2.36 is the price per brush

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A= [2, 3; 2, 1], B=[3; 5]. Find AB & BA if possible

oksano4ka [1.4K]

Answer:

The value of AB is $\left[\begin{array}{ccc}21\\11\end{array}\right]$ and it's not possible to multiply BA.

Step-by-step explanation:

Consider the provided matrices.

$A=\left[\begin{array}{ccc}2&3\\2&1\end{array}\right]$ , $B=\left[\begin{array}{ccc}3\\5\end{array}\right]$

Two matrices can be multiplied if and only if first matrix has an order m × n and second matrix has an order n × v.

Multiply AB

Matrix A has order 2 × 2 and matrix B has order 2 × 1. So according to rule we can multiply both the matrix as shown:

$AB=\left[\begin{array}{ccc}2&3\\2&1\end{array}\right] \left[\begin{array}{ccc}3\\5\end{array}\right]$

$AB=\left[\begin{array}{ccc}2\times 3+3\times 5\\2\times 3+1\times 5\end{array}\right]$

$AB=\left[\begin{array}{ccc}6+15\\6+5\end{array}\right]$

$AB=\left[\begin{array}{ccc}21\\11\end{array}\right]$

Hence, the value of AB is $\left[\begin{array}{ccc}21\\11\end{array}\right]$

Now calculate the value of BA as shown:

Multiply BA

Matrix B has order 2 × 1 and matrix A has order 2 × 2. So according to rule we cannot multiply both the matrix.

We can multiply two matrix if first matrix has an order m × n and second matrix has an order n × v.

That means number of column of first matrix should be equal to the number of rows of second matrix.

Hence, it's not possible to multiply BA.

5 0

4 years ago

A circle has a radius of 12 and a center at (-7,4)<br> Find the equation of the circle

Eddi Din [679]

<span>The equation for the circle is

</span><span>(x+7)^2+(y-4)^2=12^2 </span>

4 0

3 years ago

Read 2 more answers

If you started the problem by converting 1 pound to 16 ounces, would you get the same results?

Arturiano [62]

Answer:

yes

Step-by-step explanation:

you would get results bc results are results

4 0

3 years ago

-Dominant- [34]

Answer:

All four

Step-by-step explanation:

SSS, SAS, ASA, and HL

7 0

2 years ago

A computer monitor is listed as being 17 inches. This is the diagonal across the screen. If the screen measures 10 inches in hei

Aneli [31]

diagonal = sqrt(l^ + w^2)

17 = sqrt(10^2 + x^2)

17^2 = 10^2 + x^2

289 = 100 + x^2

189 = x^2

x = sqrt(189) = 13.747

X = 13.75

width is 13.75 inches

3 0

3 years ago