MATHEMATICS HIGH SCHOOL

Find all solution of the equation.
y=-x
y=xlnx

Answers

Answer 1
Answer: \left\{\begin{array}{ccc}y=-x\ny=xlnx\end{array}\right;\ \ \ D:x\in\mathbb{R^+}\n\nxlnx=-x\n\nxlnx+x=0\n\nx(lnx+1)=0\iff x=0\notin D\ or\ lnx+1=0\n\nlnx=-1\iff x=e^(-1)\to x=(1)/(e)\in D\n\nAnswer:x=(1)/(e)\ and\ y=-(1)/(e)

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CJ went out to eat. He wanted to tip 18% because he got exceptional service. His bill (before tip) was $18.47. What was the total bill including tip?​

Answers

Answer:$21.79

Step-by-step explanation:

If the original cost is 18.47 and you want to tip 18% tip the tip you would tip is 3.32 and if you add that to 18.47 you will get 21.79

125% of 62 is what number

Answers

For this problem you would simply multiply the number 62 by 1.25.  I hope this helps, and if so have a nice day! If you have further questions please ask.  =)
62/1.25=77.5
thats how you get your answer

Evaluate the following y^2-5y+2

Answers

If y = 3, then you substitute 3 into wherever it says y.

So the original: 
y² - 5y + 2

becomes:
3² - 5×3 + 2.

which is:
9 - 15 + 2.

9 - 15 = -6
-6 + 2 = -4.

-4 is the answer.

If Dave runs 1.3 kilometers in 10 minutes what is his average rate?Adapting and Using Formulas

Answers

1.3km = 10 minutes

speed * time = distance

speed = distance divided by time

His speed = 1.3/10 = 0.13 km/h

1. It costs $0.50 to download an individual song and $8 to download an album. Max has $20 to spend downloading music.a. Write an equation relating the number of individual songs s and the number of albums a Max can download.

Answers

Answer:

s x $0.50(a x $8.00)< $20

Step-by-step explanation: Let A stand for albums and S stand for songs

What would my final balance be if i put R650 in the bank for 60 Months with an interest rate of 6%

Answers

60 months is 5 years
12 × 5 = 60

Interest = Principle amount × Rate × Time in years
             = 650 × 0.06 × 5 (6% = (6)/(100) = 0.06)
             = R195

R650 + R195 = R845
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