Answer:
x=-5 x=-4
Step-by-step explanation:
y=x^2 + 9x + 20
We need to factor the equation
What 2 numbers multiply to 20 and add to 9
4*5 = 20
4+5 =9
y=(x+5) (x+4)
To find the zero's we set the equation equal to zero
0= (x+5) (x+4)
Using the zero product property
x+5 = 0 x+4=0
x=-5 x=-4
Answer:
t + 3:45 = 11:20 am
Step-by-step explanation:
A rocket is scheduled to launch from a command center in 3.75 hours.
The launch time is 11:20 am.
We need to know the time before 3.75 hours of 11:20 am.
3.75 hours = 3 hours (0.75 × 60) = 45 minutes
Let the current time be 't'
Now the equation will be
t + 3:45 = 11:20 am
t = 11:20 - 3:45
t = 7 : 35 am
Before 3.75 hours of 11:20 am it will be 7:35 am.
The equation would be 3.75+t=11.2 so:
3.75+t=11.2
3.75+t-3.75=11.2-3.75
t=7.45, which is 7:35.
B. Should your answer be more than 228 or less? Explain.
The airline should sell 217 tickets to have a 95% probability that all seats will be filled.
To determine how many tickets the airline should sell, we need to find the number of tickets that corresponds to a 95% probability of a person actually going on the flight. We can think of this as finding the number of tickets that gives us a 95% confidence level.
We can use the formula for confidence interval to find the number of tickets:
Number of tickets = (Desired confidence level) × (Total number of seats)
Number of tickets = 0.95 × 228 = 216.6
Since we can't sell a fraction of a ticket, the airline should sell 217 tickets to have a 95% probability that all seats will be filled.
#SPJ3
(2). 4x-2x+8=2x-2x-10
(3). 2x+8=-10
(4). 2x+8-8=-10-8
(5). 6x=-2
(6). 6x/6=-2/6
(7). x=-1/3
ANSWER= square root(-1) = i
STEP-BY STEP EXPLANATION:
Imaginary number. An imaginary number is the square root of a negative real number. (The square root of a number is a second number that, when multiplied by itself, equals the first number.)