Questions in mathematics

Questions in mathematics

[Jawaban] In a survey of 150 students, 90 students were taking algebra, and 30 were taking biology. 1. What is the least number of students who could have been taking both courses? 2. What is the greatest number of students who could be taking both courses? 3. What is the greatest number of students who could have been taking neither course?

[Jawaban] Esme read 12 pages from her science book last night, and it took her 18 minutes. How long will it take her to read tonight's homework, which is 22 pages long? Explain and show your reasoning.

[Jawaban] What is 0.142 in its standard form?

[Jawaban] If 60 marks are 40%, what is the full marks?

[Jawaban] How do you turn \(\frac{12}{15}\) and \(\frac{68}{80}\) into a decimal and into a percent?

[Jawaban] A car wash charges a flat rate for the first 8 minutes of washing time and a certain amount for each additional minute. Gina took 12 minutes to wash her car and it cost her a total of $5.00. Kris took 17 minutes to wash his truck at a total cost of $6.25. How much is the flat rate for the first 8 minutes? Show the equation used to find the answer.

[Jawaban] What is [tex]\frac{1}{5} - \frac{1}{7}[/tex]? Please explain how to work it out. Thank you.

[Jawaban] What is the value of x? \[ x + 5 = -6x - 16 \]

[Jawaban] A typical container of orange juice concentrate holds 12 fluid ounces (fl oz). The standard recipe is "Mix one can of concentrate with three cans of cold water." Olivia has a one-gallon container to fill with orange juice. She uses the standard recipe. How much concentrate does she need? (One gallon = 128 fl oz)

[Jawaban] The rate for one unit of a given quantity is called the unit rate.