Working alone, Dan can sweep a porch in 15 minutes. Alberto can sweep the same porch in 11 minutes. If they worked together how long would it take them?

Working alone, Dan can sweep a porch in 15 minutes. Alberto can sweep the same porch in 11 minutes. If they worked together how long would it take them?

Over a period of three weeks, Charles has saved $196. The first week he saved $42. For the next to weeks, the amount of money he saved was the same. Which equations correctly represent w, the amount...

Consider the simultaneous equations px-y=6, 8x-2y=q determine the conditions that p and q must satisfy of the simultaneous equations have (i) an infinite number...

A two-digit number is such that the sum of its digits is 1/4 of the number. When the digits of the number are reversed and the number is subtracted from the original number, the result obtained is...

all it says is solve, please include steps :)

want to check my answer!

if they have exactly 3Z members in common how many elements are the union set of c and d disregarding elements that are in the intersection of c and d. A)a+b b)2a+3b c)2...

Write a quadratic equation having the given solutions. 4, -8

A chef is using a mixture of two brands of Italian dressing. The first brand contains 5% vinegar, and the second brand contains 15% vinegar. The chef wants to make 390 milliliters of a dressing that...

Benjamin threw a rock straight up from a cliff that was 84 ft above the water. If the height of the rock h, in feet, after t seconds is given by the equation h= -16t^2+100t+84, how long will...

this problem makes no sense to me! Pls help!

Solve for x: 18 + 2x -7=3x

Expand (√5 + 2√3)(√5 -2√3). Express your answer as simply as possible. Please explain how to answer this question. Thanks :)

-Having y-intercept 6 and parallel to the x-axis -Having the x-intercept be -4 and parallel to the y-axis

How to solve a number minus 17 divided by 2 squared equals 1

writing an equation solving the problem --- magie has a ribbon 27 feet long what is the lenght of the in yards?

attempted this problem, I keep getting different results. not sure which right. 3 x - 9 y equals 12 2 x - 6 y equals 8

The perimeter of a standard tennis court when used for doubles play is 288ft. The width is 22 ft less than the length. Find the dimensions. choose the system of equations that is a...

Cedar point amusement park charges $51.99 for an adult ticket and $26.99 for a child's ticket. One Thursday the park collected $15,591.40 from a total of 360 adults and children. How many admissions...

I need some help figuring out this problem: Find the slope of the line containing this pair of points (-8,1) and (-6,-7)

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