3 tens= 30
10 ones= 10
30+10=40
Answer:
Sean is 1.15m
Step-by-step explanation:
35cm = 0.35m
Lisa is 1.5m tall and Sean is 0.35m shorter
1.5m - 0.35m = 1.15m
Sean is 1.15m
(0,0),(-1,2)
slope = (2 - 0) / (-1 - 0) = - 2/1 = -2
so this equation, since it goes thru the origin, is : y = -2x or 2x + y = 0
(2,3),(1,-2)
slope = (-2 - 3) / (1 - 2) = -5/-1 = 5
y = mx + b
slope(m) = 5
(2,3)...x = 2 and y = 3
now sub into the formula and find b, the y int
3 = 5(2) + b
3 = 10 + b
3 - 10 = b
-7 = b
so this equation is : y = 5x - 7 or 5x - y = 7
so ur 2 equations are :
2x + y = 0
5x - y = 7
Answer: -17
f(-2)= -2^2 + 4(-2) -5
-4 + (-8) -5
-4-8-5= -17
