Answer:
y = -3x - 2, the slope is -3 and the y-intercept is -2
Step-by-step explanation:
2y +4 = -6x and minus the four to get 2y alone
Then divide -4 and -6x by 2 to get y = -3x and -2
Slope = (y2-y1)/(x2-x1)
slope = (1-5)/(2-4)
slope = -4/-2
slope = 2
HOW TO WORK OUT
cross multiply so $24 is 80% because it was 20% discounted so..
24 = 80%
? = 100%
24 x 100 = 2400
2400 divided by 80 = 30
$30 was the original price
HOW TO CHECK
20% of $30
again you cross multiply so..
$30 = 100%
? = 20%
30 x 20 = 600
600 divided by 100 = 6
$30 - $6 = $24 which was the discounted pricw
Answer:
the point on the plane (-15, 5)
Step-by-step explanation:
These lines are:
1) a vertical line (x=-15) which implies that all x values of the points that it contains have coordinate x= -15
2) a horizontal line (y=5) which implies that all y values of the points that it contains have coordinate y = 5
Then the intersection must occur at x = -15 and y = 5, that is at the point (-15, 5)
