All categories

3 years ago

1. Kyle is using elimination to solve the system

Mathematics

1 answer:

Andrei [34K]3 years ago

7 0

I think it’s D but I am not sure

You might be interested in

See question in attached photo.

statuscvo [17]

9514 1404 393

Answer:

(a, b) = (-2, -1)

Step-by-step explanation:

The transpose of the given matrix is ...

$A^T=\left[\begin{array}{ccc}1&2&a\\2&1&2\\2&-2&b\end{array}\right]$

Then the [3,1] term of the product is ...

$(A\cdot A^T)_{31}=\left[\begin{array}{ccc}a&2&b\end{array}\right]\cdot\left[\begin{array}{ccc}1&2&2\end{array}\right]=a+2b+4$

and the [3,2] term is ...

$(A\cdot A^T)_{32}=\left[\begin{array}{ccc}a&2&b\end{array}\right]\cdot\left[\begin{array}{ccc}2&1&-2\end{array}\right]=2a-2b+2$

Both of these terms in the product matrix are 0. We can solve the system of equations by adding these two terms:

(a +2b +4) +(2a -2b +2) = (0) +(0)

3a +6 = 0

a = -2

Substituting for 'a' in term [3,1] gives ...

-2 +2b +4 = 0

b = -1

The ordered pair (a, b) is (-2, -1).

8 0

3 years ago

Leo bought 6 chew toys each chew toy cost 4.how much did leo spend for the chew toys

Andrew [12]

6•4=24 so he spent a total of $24

8 0

3 years ago

Read 2 more answers

A standard deck of has 52 cards, and contains 13 cards of each of the four suits: diamonds, spades, hearts, and clubs. what is t

NARA [144]

Answer: 13/51

Explanation:

$\textnormal{Probability }= \cfrac{\textnormal{Number of spades}}{\textnormal{cards left to draw}} = \cfrac{13}{51}$

4 0

3 years ago

Big test best answer possible please problem3

wlad13 [49]

Answer:

Step-by-step explanation

Using the formula: A= base1 + base 2/ 2 *h

The base you are looking for will be named a;

a = 2 a/h - b 2*112/8 - 11 =17

first a is base a. = 2 times area divided by height minus base b which is 2 times 112 over 8 minus 11 which gives you the answer of 17

3 0

3 years ago

Read 2 more answers

Lượng tăng (hoặc giảm) tuyệt đối phản ánh về *

Norma-Jean [14]

Ndkdodsixidikkkdodkdndodod

7 0

3 years ago