Basic Math Questions and Answers

One number is 2 more than another. The difference between their squares is 28. What are the numbers? Answer How to enter your answer (opens in new window) smaller number = larger number =

An airplane flew from Chicago to San Francisco in 3.9 hours. If the cities are 1,950 miles apart, what was the average speed of the plane? mph

Suppose potato chips cost 36.5 cents per ounce. If a bag costs $4.67, how many ounces are in the bag of chips? Round your answer to the nearest hundredth, if necessary.

Find three consecutive even integers such that the square of the third is 52 more than the square of the second. The smallest integer is The middle integer is The largest integer is .

Factor completely. 3a^4-147 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. 3a^4 - 147 = B. The polynomial is prime.

Raina's cow gives 1 1/2 gallons milk each day. How much is this in quarts? Write your answer as a whole number or a mixed number in simplest form. Include the correct unit in your answer.

The values of two functions, f and g, are given in a table. One, both, or neither of them may be exponential. Give the exponential models for those that are. (If an answer does not exist, enter DNE.) x -2 -1 0 1 2 f(x) 1.125 2.25 4.5 9 18 g(x) 12 6 3 1.5 0.75 f(x)= g(x)=

Use synthetic division to find the result when 3x⁴ - 3x³ + 16x² - 11x - 31 is divided by x + 4. Provide your answer below: Write your answer in the form q(x) + r(x)/d(x) , where q(x) is the quotient, r(x) is the remainder, and d(x) is the divisor. Do not include a comma in any numbers in your answer.

Solve the compound inequality and give your answer in interval notation. 5x + 2<-23 AND-7x -8 ≤34

By weight, the ratio of chlorine to sodium in a salt is 56.72 to 21.00. How much sodium is contained in 56.00 kg of salt? There is kg of sodium. (Simplify your answer. Round to two decimal places as needed.)

- At Mr. Russa's garage sale, all books were one price, and all magazines were another price. Robert bought four books and three magazines for $1.45, and Jennifer bought two books and five magazines for $1.25. What was the price of a book and what was the price of a magazine?

Factor the following expression completely. m5n-625mn5 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. m5n-625mn5 = B. The polynomial is prime.

For the following equation, find three ordered pair solutions by completing the table. Then use the ordered pairs to graph the equation. y=-3x+7 Find three ordered pair solutions of the given equation.

The percent error in a measurement is the ratio of the error in the measurement to the measurement itself, expressed as a percent. When writing a computer program, the memory remaining is determined as 2640 bytes and then it is correctly found to be 2720bytes. What is the percent error in the first reading? The percent error is %. (Round to one decimal place as needed.)

A Field Poll Survey reported that 59% of registered voters in a state approved of allowing two people of the same gender to marry and have regular marriage laws apply to them. Among 18 to 39 year olds (registered voters in this state), the approval rating was 77%. Six in ten registered voters in this state said that the upcoming Supreme Court's ruling about the constitutionality of a proposition was either very or somewhat important to them. Out of those registered voters who support same-sex marriage, 75% say the ruling is important to them. In this problem, let the following apply. • C = registered voters who support same-sex marriage • B = registered voters who say the Supreme Court's ruling about the constitutionality of the proposition is very or somewhat important to them • A = registered voters who are 18 to 39 years old. Part (a) Part (b) Find P(B). (Enter your answer to two decimal places.) P(B) = Part (c) Part (d) Part (e) Part (f)

At a local Dunkin' Donuts, a survey showed that out of 1,240 customers eating lunch, 496 ordered coffee with their meal. What percent of customers ordered coffee?

Write an equation of the line that passes through (5,-4) and is perpendicular to the line defined by x-3y=4. Write the answer in slope-intercept form (if possible) and in standard form (Ax+By=C) with smallest integer coefficients. Use the "Cannot be written" button, if applicable. The equation of the line in slope-intercept form: y = −3x + 11 The equation of the line in standard form:

Graph the following inequality. Note: To graph the inequality: 1. Select the type of line below (solid or dashed). 2. Plot two points on the line. 3. Click on the side that should be shaded. x≥3

For the function f(x) = -5x² + x + 4, evaluate and fully simplify each of the following f(x + h) = f(x+h)-f(x)/h =

The population P (in millions) of Italy from 2003 through 2015 can be approximated by the model P = 57.59e0.0051t, where t represents the year, with t = 3 corresponding to 2003. (a) According to the model, is the population of Italy increasing or decreasing? Explain. Because the coefficient of the model is --Select-- the population is --Select--- (b) Find the populations of the country in 2003 and 2015. (Round your answers to three decimal places.) 2003 million 2015 million (c) Use the model to predict the populations of the country in 2025 and 2034. (Round your answers to three decimal places.) 2025 million. 2034

If refinishing your basement at a cost of $44,141 would add $19,260 to the resale value of your home, what percent of your cost is recouped? (Round to the nearest whole percent.)

A can of beans has surface area 381 cm². Its height is 18 cm. What is the radius of the circular top? (Hint: The surface area consists of the circular top and bottom and a rectangle that represents the side cut open vertically and unrolled.)

A company set aside a certain amount of money in the year 2000. The company spent exactly the same amount from that fund each year on perks for its employees. In 2004, there was still $649,000 left in the fund. In 2006, there was $609,000 left. Let z be the number of years since 2000, and let y be the amount of money left in the fund that year. Use a linear equation to model the amount of money left in the fund after so many years. a. The linear model's slope-intercept equation is b. In the year 2010, there was c. In the year

Daisy has one cucumber that is 3 inches long and another cucumber that is 5 inches long. She cuts the cucumbers into 3/8-inch-thick slices and adds them to a salad. How many 3/8-inch-thick slices does Daisy have? 1. Write division expressions to represent the first steps in the problem. 2. Solve. Then explain your answer.

Decide whether the ordered pair (-8, -2) is a solution of the equation. 7x-7y=0 is (-8,-2) a solution of 7x-7y=0? Select the correct choice below and fill in the answer box within your choice. (Simplify your answer. Type an integer or a simplified fraction.) Yes, because replacing x with -8 and y with -2 and simplifying on the left side results in No, because replacing x with - 8 and y with -2 and simplifying on the left side results in which equals the right side. which does not equal the right side.

Find all excluded values for the expression. That is, find all values of u for which the expression is undefined. If there is more than one value, separate them with commas.

Fill in the blanks below with the correct units. (a) Kala drank about 300 of juice with lunch. (b) The opening of the drinking straw was about 6 ? wide. (c) Alonzo saw an elephant at the zoo. The elephant's mass was about 4000 ?

Each of 8 students reported the number of movies they saw in the past year. This is what they reported: 10, 4, 17, 14, 17, 4, 10, 11 Find the median and mean number of movies that the students saw. If necessary, round your answers to the nearest tenth.

A plane has a cruising speed of 200 miles per hour when there is no wind. At this speed, the plane flew 500 miles with the wind in the same amount of time it flew 300 miles against the wind. Find the speed of the wind.

For his phone service, Alonzo pays a monthly fee of $14, and he pays an additional $0.07 per minute of use. The least he has been charged in a month is $106.26. What are the possible numbers of minutes he has used his phone in a month? Use m for the number of minutes, and solve your inequality for m.

Using the remainder theorem, which binomial divisor of f(x) results in a remainder of -90,916 for the function f(x)=x^5-4x³ +51x² 16? Select the correct answer below: (x-10) (x+10) (x-9) (x+9) (x-8) (x+8)

Keith has $500 in a savings account at the beginning of the summer. He wants to have more than $200 in the account by the end of the summer. He withdraws $25 each week for food, clothes, and movie tickets. Write an inequality that represents Keith's situation. Use w to represent how many weeks that Keith can withdraw money. How many weeks can Keith withdraw money from from his account? Write your answer in standard form.

You are in charge of buying office supplies for your business. Your workers use red and black pens. Red pens cost $5 per box and black pens cost $3 per box. You need at least 10 boxes of pens. You want no more than 7 boxes of black pens and no more than 6 boxes of red pens. You want to minimize the cost to your business. Which of the following is NOT a constraint in the situation?

A rectangular field is four times as long as it is wide. If the perimeter of the field is 440 yards, what are the field's dimensions? The width of the rectangular field is The length of the rectangular field is

A distribution of values is normal with a mean of 198.3 and a standard deviation of 22.3. Find P37, which is the score separating the bottom 37% from the top 63%. Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.

Jake's water bill is $25.40 per month plus $2.40 per ccf (hundred cubic feet) of water. What is the maximum number of ccf Jake can use if he wants his bill to be no more than $60.00? The maximum number of ccf's Jake can use is

Use synthetic division to divide 2x³ - 6x² - 5 by x - 1. Write your answer in the form g(x) + r(I) where g(x) is the quotient, r(a) is the remainder, and d(x) is the divisor.

Using synthetic division, what is the quotient and the reminder for (3x3 + 7x² - 8x +46) ÷ (x+4)? If the remainder is non-zero, express the remainder term as a fraction using the divisor as the denominator.

A ball is dropped from the top of a building that is known to be 784 feet high. The formula for finding the height of the ball at any time is h = 784 -16t², where fis measured in seconds. Step 2 of 3: How many seconds did it take for the ball to reach a height of 528 feet above the ground?

Compute each of the following. Enter your answer simplified, in interval notation. (-9, ∞) ∩ (-∞, 7) = (-9, ∞) ∪ (-∞, 7) =

The function s(t) describes the motion of a particle along a line. s(t)= t² 14t+ 22 (a) Find the velocity function v(t) of the particle at any time t≥ 0. (b) Identify the time interval(s) in which the particle is moving in a positive direction. (Enter your answer using interval notation.) (c) Identify the time interval(s) on which the particle is moving in a negative direction. (Enter your answer using interval notation.) (d) Identify the time(s) at which the particle changes direction. (Enter your answers as a comma-separated list.)

A colony of bacteria is of size S(t) = 300e0.1t after t hours. Find the average size during the first 15 hours (that is, from time 0 to time 15). (Round your answer to the nearest whole number.)

Jim Goodman, an employee at Walgreens, earned $38,400, an increase of 16.5% over the previous year. What were Jim's earnings the previous year? (Round to the nearest cent.)

Web Consultants, Inc., pays Alice Rose an annual salary of $55,200. Today, Alice's boss informs her that she will receive a $5,600 raise. What percent of Alice's old salary is the $5,600 raise? (Round to nearest tenth percent.)

Staples pays George Nagovsky an annual salary of $30,000. Today, George's boss informs him that he will receive a $3,500 raise. What percent of George's old salary is the $3,500 raise? (Round to the nearest tenth percent.)

The body mass index, I, can be used to determine an individual's risk for heart disease. An index less than 25 indicates a low risk. The body mass index is given by the I= 700W/H² where W = weight, in pounds, and H= height, in inches. Jerome is 72 inches tall. What weights will keep his body mass index between 19 formula, or model, and 30? Jerome's body mass index will fall between 19 and 30 for the set of all weights such that<W< (Round to the nearest whole number as needed.)

A plane flies 435 miles with the wind and 375 miles against the wind in the same length of time. If the speed of the wind is 10 mph, find the speed of the plane in still air

A rental car company charges $80 per day to rent a car and $0.10 for every mile driven. Luke wants to rent a car, knowing that: He plans to drive 500 miles. He has at most $410 to spend. Write and solve an inequality which can be used to determine d, the number of days Luke can afford to rent while staying within his budget.

Which equation is equivalent to 2 1/4+2/4 = 2 3/4? 7/4 + 2/4 = 9/4 21/4 + 2/4 = 23/4 3/4 + 2/4 = 5/4 9/4 + 2/4 =11/4

For $9.79, Costco sells a box containing 52.5 ounces of Oreo cookies. Target sells a box of Oreos that is 19.1 ounces in size for $3.69. Which is the better purchase? Please explain how you arrived at your answer.