Determine what type of model best fits the given situation: the temperature of a cup of coffee decreases by 5 F every 20 minutes
.
A. liner
B. exponential
C. quadratic
D. none of these
1 answer:
Answer: T = -t / 4 + T0 where t is the temperature in minutes elapsed, T is the final temperature, and T0 is the initial temperature
Explanation: This is a linear equation in T and t
(-1 / 4 represents -5 deg / 20 min = - 1 deg / 4min
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Answer:
-21
28
Step-by-step explanation:
1) if r = -4
Substitute r = -4 in 3r - 9
= 3 * (-4) - 9
= -12 - 9
= -21
2) ( 4 / 7 ) * x = 16
4 * x = 16 * 7
x = 4 * 7
x = 28
Answer:
c= -9
Step-by-step explanation:
19-4c=17
+19 +19
-4c= 36
divide by -4
c= -9
Answer:
Step-by-step explanation:
-5x - 10y = 15
<u>-3x + 10y = 25 </u>+
-8x = 40
x = -5
.
Substitute the value of x to one of equations
-5(-5) - 10y = 15
25 - 10y = 15
-10y = 15 - 25
-10y = -10
y = 1
Answer:
D
Step-by-step explanation:
If it is September, then it is my birthday
2xy + 5 - 8 + 3xy - y +7 + 3y = 5xy - 8 + 2y + 12
