Question

1. a) (2,7),4,11) b (5,-3),(-1,-)2 a) (5,8),5, -7) b (-6,4) ,(-2,4)

Answer 1

Answers:

a) x = 70

b) y = -50

c) x = 80

Step-by-step explanation:

The initial equation is:

y = 5x - 300

a) y = 50

So, we need to replace y by 50 and solve for the variable x, then:

y = 5x - 300

50 = 5x - 300

50 + 300 = 5x - 300 + 300

350 = 5x

350/5 = 5x/5

70 = x

b) x = 50

Now, we need to replace x by 50 and solve for y, so:

y = 5x - 300

y = 5(50) - 300

y = 250 - 300

y = - 50

c) y = 100

We need to replace y by 100 and solve for x, so:

y = 5x - 300

100 = 5x - 300

100 + 300 = 5x - 300 + 300

400 = 5x

400/5 = 5x/5

80 = x