Step-by-step explanation:
Really really sorry if I'm wrong...
<u>Y2 -Y1</u>
X2 - X1
<u>-20 - - 8</u>
-9 - -5
<u>-12</u>
-4
(simplified): <u>-3</u>
-1
Answer:
m>-20
Step-by-step explanation:
to leave m alone you need to multiply -2 to the other side but when you do that the sign changes because its by a negative.
Answer:
a) t = 4 secs
b) t = 3 secs
Step-by-step explanation:
h = 64 ft
Initial velocity = 48 ft/s
S = 64 + 48t - 16t^2
a) Set S = 0 and solve for t
0 = 64 + 48t - 16t^2
Divide through by 16
0 = 4 + 3t - t^2
t^2 - 3t - 4 = 0
t^2 - 4t + t - 4 = 0
t(t - 4) + 1(t - 4) = 0
(t + 1) (t - 4) = 0
t + 1 = 0 or t - 4 = 0
t = -1 or t = 4
t = {-1,4}
t = 4 seconds
b) Set S = 64 and solve for t
64 = 64 + 48t - 16t^2
64 - 64 = 48t - 16t^2
0 = 48t - 16t^2
Divide through by 16
0 = 3t - t^2
t^2 - 3t = 0
t(t - 3) = 0
t = 0 or t-3 = 0
t = 0 or t = 3
t = {0,3}
t = 3 secs
Answer:
BRAINLIEST PLZZZ
Step-by-step explanation:
50/100 of x = 20
x = 20× 100/50
x = 20× 2
x = 40
therefore,
75/100 of 40
= 3/4 × 40
=3 × 10
= 30
hope this helps
9514 1404 393
Answer:
72 kph
Step-by-step explanation:
The first sentence tells you the speeds are proportional. So, you can write the proportion ...
kph/mph = 120/75 = x/45
Multiplying by 45 gives x:
x = (45)(120/75) = 72
72 kph is 45 mph.
