Answer:
y = -2x + 4
Step-by-step explanation:
y = mx + b
(4,-4)
b = y - mx = -4 - (-2)*4 = 4
y = -2x + 4
Answer:
you minus 8 from 20 which will = to 12. Then you divide 12 by 4.99 and it equals to like 2.4 but you can't buy a .4 of a candy bar so have to round it down to 2
Step-by-step explanation:
Use proportions to solve this. Set up the ratios with dollars on the top and pounds on the bottom and then cross-multiply to solve for x. Like this:
. Cross multiplying gives us 800x=168,000. Divide by 800 to get that x = 210. So $300 equals 210 pounds.
Answer:
3x + 2y = 315 -----(1)
2x + 4y = 450 -----(2)
from (1) 3x + 2y = 315
2y = 315-3x
y = 157.5 - 3/2x ---- (3)
substitute (3) into (2)
2x + 4y = 450
2x + 4(157.5 - 3/2x ) = 450
2x + 630 - 6x = 450
-4x = -180
x = 45 ---- (4)
substitute (4) into (3)
y = 157.5 - 3/2x
y = 157.5 - 3/2(45)
y = 90
a haircut,x = 45 minutes
dye hair,y = 90 minutes
Step-by-step explanation:
Perpendicular (p) = a
base (b) = 6
tan 45° = p/b
1 = a / 6
Cross multiply
a = 6
Hope it will help :)
