Answer:
x+5= x+5 7.5=7.5 and 2x-5= 2x-5
Answer:
( Hint)
To find the curve of best fit, you will need to do exponential regression. Press STAT, then right arrow to highlight CALC, and then press 0:ExpReg . The correlation coefficient is r, which is 0.994 in this case. That means that the equation is a 99.4% match to the data.
Let r and s represent the number of times Caleb can ride the roller coaster and watch a show, respectively. The time Caleb needs to allow for each roller coaster ride is (wait time) + (ride time) = (30 +5) min = 35 min. Then we can write the equations
r - s = 3
35r +25s ≤ 345
Adding 25 times the first equation to the second, we get
25(r -s) +(35r +25s) ≤ 25(3) +(345)
60r ≤ 420 . . . . . . collect terms
r ≤ 7 . . . . . . . . . . . divide by 60
Caleb can ride a maximum of 7 roller coasters and watch 4 shows in 345 minutes.
_____
The problem can obviously be worked using two equations instead of one equation and an inequality. It isn't clear until the final answer that the number of minutes comes out exactly the amount needed, which is why we chose an inequality.
To find the answer, find the unit rate by dividing 57 by 19. The answer to that is 3. Multiply 48 by 3. That’s how much it costs. Your final answer is 144 cents. I hope this helps!
Answer:
2 -7i
Step-by-step explanation:
(-2 - 5i) - (-4 + 2i)
Distribute the minus sign
(-2 - 5i) + 4 - 2i
Combine like terms
-2+4 -5i -2i
2 -7i
