Answer:
I believe the answer is 2.4 :)
Step-by-step explanation:
Twice the difference of a number and four: 2(x - 4)three times the sum of the number and 2: 3(x + 2) 2(x - 4) = 3(x + 2)2x - 8 = 3x + 6-14 = x to confirm2[(-14) -4] = 2(-18) =-363 [(-14) +2] = 3 (-12) = -36
Answer: {y,x}={2,8}
// Solve equation [2] for the variable y
[2] y = -2x + 18
// Plug this in for variable y in equation [1]
[1] (-2x+18) - x = -6
[1] - 3x = -24
// Solve equation [1] for the variable x
[1] 3x = 24
[1] x = 8
// By now we know this much :
y = -2x+18
x = 8
// Use the x value to solve for y
y = -2(8)+18 = 2
Solution :
{y,x} = {2,8}
Answer:
t1= 1.1475 sec
t2=9.48 sec
Step-by-step explanation:
This question asking for the time when an object reach a specific height. I will explain what the formula stand for to make this easier.
h= height = 174feet
v0= initial velocity = 170 feet/s
t= time
h0= initial height= ground level = 0
The question have predetermined formula for the height, so we should use it instead of formula that involve gravity value.
h= -16 +v0t + h0t
174 feet = -16 + 170 feet/s x t + 0 x t
-16 + 170 feet/s x t - 174 feet = 0
8 - 85 feet/s x t + 87 feet = 0
This equation will be hard to solve since its value in fraction, so lets use the quadratic formula
t1=
t1= 1.1475
t2=
t2=9.48