# Recent questions in Pre-Algebra

Fractions

### State whether the function is discrete or continuous. $$\displaystyle{\frac{{{y}}}{{{4}}}}$$, where x is the number of hours and y is the miles walked

Equation, expression, and inequalitie

### $$\displaystyle{3}\sqrt{{\frac{{1}}{{84}}}}$$

Equation, expression, and inequalitie

### Suppose you ask a friend to randomly choose an integer between 1 and 10, inclusive. What is the probability that the number will be more than 4 or odd? (Enter your probability as a fraction.)

Ratios, rates, proportions

### A cd that has a price of $15.50 is on sale at a 25% discount.what is sale price with 6.5 tax? Ratios, rates, proportions ANSWERED asked 2021-06-27 ### A$150,000 loan with $3000 in closing costs plus 1 point requires an advance payment of Equation, expression, and inequalitie ANSWERED asked 2021-06-26 ### A sequence is generated by the recurrence relation un+1=7−2un If u2=5, what is the value of u0? Equation, expression, and inequalitie ANSWERED asked 2021-06-25 ### There are 5 women and 3 men waiting on standby for a flight to New York. Suppose 3 of these 8 people are selected at random, and a random variable X is defined to be the number of women selected. Find $$Pr[X = 2]$$. Decimals ANSWERED asked 2021-06-25 ### Multiplying Decimals by Whole Numbers. A package of sunflower seeds has a mass of 0.1 kilogram. What is the mass of 3 packages of sunflower seeds? Equation, expression, and inequalitie ANSWERED asked 2021-06-24 ### Suppose you ask a friend to randomly choose an integer between 1 and 10, inclusive. What is the probability that the number will be more than 4 or odd? (Enter your probability as a fraction.) Ratios, rates, proportions ANSWERED asked 2021-06-24 ### A group of 6 friends went to a sporting event. It cost$30 for each of them to get in. What was the total cost for all of them to get in?

Equation, expression, and inequalitie

### How many 2-letter code words can be formed from the first 3 letters of the alphabet if no letter can be used more than once?

Equation, expression, and inequalitie

### A sequence is generated by the recurrence relation $$un+1=7−2un$$ If $$u_{2}=5$$, what is the value of $$u_{0}$$?

Negative numbers and coordinate plane

Decimals

### When multiplying decimals, how do you know where to place the decimal point? Think about this as you do parts (a) through (d) below. a. Write two equations for multiplying 0.3 by 0.16. One equation should express the factors and product using decimals, and one using fractions. b. In part (a), you multiplied tenths by hundredths to get thousandths. Do you always get thousandths if you multiply tenths by hundredths? Why or why not? What do you get if you multiply tenths by tenths? Hundredths by hundredths? Use several examples to justify your answers. c. When a multiplication problem is written using decimals, there is a relationship between the number of decimal places in the parts (or factors) of the problem and the number of decimal places in the answer (or product). Describe this relationship. d. Describe a shortcut for locating the decimal point in the answer to a problem involving decimal multiplication.

Ratios, rates, proportions

### If the richest 5% includes 5.85 million households, how many households, in millions, are there in the United States?

Equation, expression, and inequalitie

Decimals

### The decimals chart in this lesson shows that we line up the decimal points when we add or subtract decimal numbers. Why do we do that?

Equation, expression, and inequalitie

### $$\displaystyle\frac{{4}}{{3}}={\left(\frac{{2}}{{15}}\right)}{j}$$

Ratios, rates, proportions