Need with elementary row operations!
1. [(1,,-13): }|{: (1,,1)]-1/13r_2rarrr_2rarr
2. [(1,,2): }|{: (1,,1)]r_2+(-5r_1)rarrr_2rarr
next question, determine if the matrices are inverses of each other by multiplying the matrices.
1. a=[(0,,4)]
and b=[(-2,1/,0)]
2. x=[(4,,2)]
and y=[(1/4,/8,1/2)]

choice b is correct

step-by-step explanation:

we have been given the following system of linear inequalities;

we are required to graphically determine the solution to these system of inequalities. using a graphing tool, the solution is as shown in the attachment below;

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

costs the what? what is the cost of the pants?

step-by-step explanation:

if it is $10, then the price is 14.

take 40% of the cost, and then add the cost.

40% of 10 = 4

4+10 = 14.

2

step-by-step explanation: