Solve the system using row reduction on a calculator: 7x − 3y + 2z = 19
6x + 5z = 32
5x − 2y + 6z = 32

A. (4, 1, 2)
B. (4, 2, 1)
C. (2, 4, 1)
D. (2, 1, 4)

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation:

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.

the distance between the school and her home is 3.6km.

12 mins = 0.2 hours = 1/5 hour

54 ÷ 3 = 18km per hour

1/5 of 18 = 3.6km per 12 mins