Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Trending News

Promoted
tribute_13
tribute_13 asked in Education & ReferenceStandards & Testing · 1 decade ago

SAT has these kinds of Questions?

2. If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?

How do you solve these problems algebraically, this test is designed to make me feel stupid.

Update:

I asked how to do these, I didn't ask for you to confirm that they're on the test. I'm well aware that they're on the test, I'm trying to figure out how to do these kinds of tests so I don't miss any like it, answer my question, don't make me feel stupid.

2 Answers

Relevance
  • Rumlily
    Lv 5
    1 decade ago
    Favorite Answer

    Answer: 12/5 hrs

    1/6 + 1/4 = 1/x

    10/24 = 1/x

    5/12 = 1/x

    x = 12/5

  • R K
    1 decade ago

    First you must find how much each of them can do in 1 hr. so sally can do 1/4 of the house in one hour and john 1/6 of the house in one hour. Since they both have to work together you must add each one multiplied by the time they both worked. So (1/4)x+(1/6)x=1 which is 5/12(x)=1 and then isolate the x and you get 12/5 or 2.4.

    Also if you really need help on ur sat math then get the barrons How to prepare for the SAT and read throught the math and do the problems...it explains everything. I brought my score from a 630 to a 750 in less than a month.

    Source(s): Got a 750 on Math...takin it again to get 800
Still have questions? Get your answers by asking now.