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3 years ago

If matrix A is 3 x 4 and matrix B is 4 x 6, the dimensions of matrix product AB are

Mathematics

2 answers:

gtnhenbr [62]3 years ago

4 0

It's 3 x 6..................

qwelly [4]3 years ago

3 0

Matrix AB's dimensions are 3x6

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elect the correct answer from each drop-down menu. A system of linear equations is given by the tables. x y -5 10 -1 2 0 0 11 -2

sergeinik [125]

Answer:

First equation: y = -2x

Second equation: y = 3 - x

Solution: (1, -2)

Step-by-step explanation:

Assuming the ordered pairs of the tables are:

Table 1

(-5, 10) (-1, 2) (0, 0) (11, -22)

Table 2

(-8, -11) (-2, -5) (1, -2) (7, 4)

To create a linear equation, pick 2 ordered pairs. Calculate the slope by using the slope formula, then use the points-slope form of the linear equation to form the equation.

$\textsf{slope }m=\dfrac{\textsf{change in }y}{\textsf{change in }x}$

$\textsf{point-slope form : }y-y_1=m(x-x_1)$

Equation 1

$\textsf{slope }m=\dfrac{2-10}{-1+5}=-2$

$y-0=-2(x-0)\\\\\implies y=-2x$

Equation 2

$\textsf{slope }m=\dfrac{-5+11}{-2+8}=1$

$y+11=1(x+8)\\\\\implies y=x-3$

Solution to the System

Equate the equations and solve for x:

-2x = x - 3

⇒ 0 = 3x - 3

⇒ 3x = 3

⇒ x = 1

Substitute found value of x into one of the equations and solve for y:

y = 1 - 3 = -2

Therefore, the solution is (1, -2)

4 0

2 years ago

Which key is longer: 5 cm or 2 in.?

ella [17]

2in is longer because if you convert it into cm it would be 5.08cm.

Hope I Helped!

4 0

3 years ago

Mrs. Summers polled the students in her 7th and 8th grade classes to determine the number of pets each student has at home. The

Burka [1]

Answer:

There are 32 kids in Mrs. Summers's class. The percentage is 5.30% of kids have one pet. 6 kids have one pet in Mrs. Summer's class.

I hope this helps :)

Step-by-step explanation: There are 32 students in the 7th grade/Number of pets

Step-by-step explanation:

Just count all of the x's

8 0

3 years ago

Read 2 more answers

The equation is ax+r=7 how do I solve for r??

Strike441 [17]

The solution is r= 7/a-x How did i do this?
Your equation is ax+ r=7, so the goal is to isolate the r. You begin by dividing the a from the ax. Remember, what you do to one side, you must do to the other. So you do 7/a, since you can't simplify 7/a, leave it as it is. Next, your equation should look like this x+r=7/a. In order to isolate the r, you move the x to the other side by subtracting, which leaves you with the answer of r= 7/a-x.
Hope this helped!

7 0

3 years ago

Read 2 more answers

Help help help please please

Mama L [17]

Answer:

your answer should be 200%

7 0

3 years ago