Questions in mathematics

Questions in mathematics

[Jawaban] I need help there pictures 17.

[Jawaban] Calculate the price of a $1200 TV after applying a 10% discount.

[Jawaban] Writing to Explain Use rounding to estimate the product of 12 × 9. Then, use compensation to find the total cost for 12 books that were $9 each. Would this method give a good estimate? Explain.

[Jawaban] What is the product of 49 and 45?

[Jawaban] In a group of 75 fourth graders, 20% do not like hot chocolate. How many students like hot chocolate?

[Jawaban] Tim spends about \(\frac{1}{3}\) of each weekday sleeping and about \(\frac{7}{24}\) of each weekday in school. What fraction of a weekday does Tim spend either sleeping or in school? Is this more or less than \(\frac{1}{2}\) a day? How much more or less?

[Jawaban] The campers in Cabin A walked \(\frac{1}{4}\) of the way to Otter Ridge, which is 13 miles. How do I figure out how many miles they walked?

[Jawaban] Jonah is a baker. Each morning, he makes 60 cupcakes and gives away 5, selling the rest. He also makes 48 brownies and gives away 4, selling the rest. Write an expression that can be used to find how many cupcakes and brownies Jonah sells in 7 days.

[Jawaban] Audrey has $120 to spend on a tennis racket and lessons. The racket costs $45 and the lessons cost $15 per hour. Define a variable, then write and solve an equation to find how many hours of lessons she can afford. Define the variable: Let \( h \) represent the number of hours of lessons. Write the equation: \[ 45 + 15h = 120 \] Solve the equation: \[ 15h = 120 - 45 \] \[ 15h = 75 \] \[ h = 5 \] Audrey can afford 5 hours of lessons.

[Jawaban] A hospital employs a total of 77 nurses and doctors. The ratio of nurses to doctors is 9:2. - How many nurses are employed at the hospital? - How many doctors are employed at the hospital? (Use a system of equations)