Answer:
2
Step-by-step explanation:
10x+2x=12x
38-14= 24
12x=24
divide
x=2
Answer:
$3.90
The cost of making them all is 1.50 subtracted from the profit he made
Answer:
102.3 kilometers per hour
Step-by-step explanation:
A car travel the distance of D equals 450 km for T equals 4.4 hours at a constant rate. What is the speed of the car in kilometers per hour
The formula to calculate Speed = Distance (Kilometers)/ Time(hours)
The speed of the car = 450km/4.4 hours
102.27272727 kilometers per hour
Approximately = 102.3 kilometers per hour
Answer:
t=0.64
Step-by-step explanation:
h = -16t^2 +4t +4
We want h =0 since it is hitting the ground
0 = -16t^2 +4t +4
Using the quadratic formula
a = -16 b = 4 c=4
-b ± sqrt( b^2 -4ac)
----------------------------
2a
-4 ± sqrt( 4^2 -4(-16)4)
----------------------------
2(-16)
-4 ± sqrt( 16+ 256)
----------------------------
-32
-4 ± sqrt( 272)
----------------------------
-32
-4 ± sqrt( 16*17)
----------------------------
-32
-4 ± sqrt( 16) sqrt(17)
----------------------------
-32
-4 ± 4 sqrt(17)
----------------------------
-32
Divide by -4
1 ± sqrt(17)
----------------------------
8
To the nearest hundredth
t=-0.39
t=0.64
Since time cannot be negative
t=0.64
Answer:1.41
Step-by-step explanation: subtraction
