Answer:
Part 1: 7/3 degrees/hour
Part 2: 28/3 degrees
Step-by-step explanation:
Part 1:
3 1/2 degrees per 1 1/2 hours =
= (3 1/2)/(1 1/2)
= (7/2) / (3/2)
= 7/2 * 2/3
= 7/3 degrees/hour
The rate is 7/3 degree per hour
Part 2:
In 4 hours, the temperature goes up 4 times what it goes up in 1 hour.
4 hours * 7/3 degree/hour = 28/3 degrees
we have
we know that
and
substitute in the expression
therefore
<u>the answer is</u>
Original formula:
P/2-5 when p=14
You just need to plug in 14 in place of where the variable p is at. This is called substitution.
14/2-5
By the rules of PEMDAS, we will execute 14/2 first. (7)
7-5
2 is your final answer.
Answer:
1) x²-3x+9/4 = 81/4
2) x = 6, -3
Step-by-step explanation:
x²-3x-18=0
x²-3x=18
(b/2)² = (-3/2)² = 9/4; completing the square
x²-3x+9/4 = 18+9/4
(x-3/2)(x-3/2) = 81/4
x - 3/2 = ± 9/2
x = 3/2 ± 9/2
x = 6, -3
