The augmented matrix below represents a system of equations. PH

2

7

-3

4

1

1

2

7

Which matrix results from the operation R1 R2?

2

7

2

7

1

1

1

7

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions. a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0