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Math Help - last 4 questions then BED :D

  1. #1
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    last 4 questions then BED :D

    1. what is the greatest perfect square that is a factor of 7!?


    2. A standard six-sided die with its faces numbered 1-6 is rolled once, and a dime is tossed twice, Whats the probability of rolling a number less then 3 and tossing a tail? exspress ur answer as a common fraction

    i know this one is easy i got 2/6 and 1/2 but am i supposed to make it one answer or is that my answer?

    3. When converted to be in the same unit of measure, what is the ratio of 4cm to 1km? Exspress ur answer as a common fraction?

    4. In 30 years Sue will be 4 times as old as she is now. how old is she now?
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by xsriel View Post
    1. what is the greatest perfect square that is a factor of 7!?
    note that 7! = 1*2*3*4*5*6*7

    2. A standard six-sided die with its faces numbered 1-6 is rolled once, and a dime is tossed twice, Whats the probability of rolling a number less then 3 and tossing a tail? exspress ur answer as a common fraction

    i know this one is easy i got 2/6 and 1/2 but am i supposed to make it one answer or is that my answer?
    if A and B are independent events, then the probability of A and B occurring is P(A)*P(B)

    3. When converted to be in the same unit of measure, what is the ratio of 4cm to 1km? Exspress ur answer as a common fraction?
    convert one to the other and see. i'd convert the km to cm

    4. In 30 years Sue will be 4 times as old as she is now. how old is she now?
    Let x be Sue's age now. in 30 years, she will be x + 30. and that is 4x

    can you find x?
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  3. #3
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    Quote Originally Posted by xsriel View Post
    1. what is the greatest perfect square that is a factor of 7!?


    2. A standard six-sided die with its faces numbered 1-6 is rolled once, and a dime is tossed twice, Whats the probability of rolling a number less then 3 and tossing a tail? exspress ur answer as a common fraction

    i know this one is easy i got 2/6 and 1/2 but am i supposed to make it one answer or is that my answer?

    3. When converted to be in the same unit of measure, what is the ratio of 4cm to 1km? Exspress ur answer as a common fraction?

    4. In 30 years Sue will be 4 times as old as she is now. how old is she now?
    4. All you need to do is set up an equation.
    So you want 30 years form now, so wouldn't that be 30+x=?, where x is her age now. Now what do you think, we need to put on the 2nd side?
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  4. #4
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    Quote Originally Posted by Jhevon View Post
    note that 7! = 1*2*3*4*5*6*7

    if A and B are independent events, then the probability of A and B occurring is P(A)*P(B)

    convert one to the other and see. i'd convert the km to cm

    Let x be Sue's age now. in 30 years, she will be x + 30. and that is 4x

    can you find x?

    ok i can get them all now but on number 1, i no that and its 5040
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  5. #5
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    Quote Originally Posted by Jhevon View Post
    note that 7! = 1*2*3*4*5*6*7

    if A and B are independent events, then the probability of A and B occurring is P(A)*P(B)

    convert one to the other and see. i'd convert the km to cm

    Let x be Sue's age now. in 30 years, she will be x + 30. and that is 4x

    can you find x?
    so on the probability one it'd be 1/6?
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  6. #6
    Senior Member euclid2's Avatar
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    Quote Originally Posted by xsriel View Post
    1. what is the greatest perfect square that is a factor of 7!?


    2. A standard six-sided die with its faces numbered 1-6 is rolled once, and a dime is tossed twice, Whats the probability of rolling a number less then 3 and tossing a tail? exspress ur answer as a common fraction

    i know this one is easy i got 2/6 and 1/2 but am i supposed to make it one answer or is that my answer?

    3. When converted to be in the same unit of measure, what is the ratio of 4cm to 1km? Exspress ur answer as a common fraction?

    4. In 30 years Sue will be 4 times as old as she is now. how old is she now?
    1.We don’t need to know that 7! = 5040 to find the greatest perfect square factor of 7!. We should look at the prime factorization of 7!,
    which is 7 × 6 × 5 × 4 × 3 × 2 × 1 = 7 × (2 × 3) × 5 × (2 × 2) × 3 × 2 × 1. We have four factors of 2 and two factors of 3, so the greatest perfect
    square factor of 7! is 24 × 32 = 16 × 9 = 144.
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    Senior Member euclid2's Avatar
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    Quote Originally Posted by xsriel View Post
    1. what is the greatest perfect square that is a factor of 7!?


    2. A standard six-sided die with its faces numbered 1-6 is rolled once, and a dime is tossed twice, Whats the probability of rolling a number less then 3 and tossing a tail? exspress ur answer as a common fraction

    i know this one is easy i got 2/6 and 1/2 but am i supposed to make it one answer or is that my answer?

    3. When converted to be in the same unit of measure, what is the ratio of 4cm to 1km? Exspress ur answer as a common fraction?

    4. In 30 years Sue will be 4 times as old as she is now. how old is she now?
    2.There are two numbers less than 3 on a standard die (namely, 1 and 2), so there is a 2/6 chance of rolling one of those. There is also a
    1/2 chance of tossing a tail on the dime. The probability that these two things will happen together is 2/6 × 1/2 = 1/6.
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  8. #8
    Senior Member euclid2's Avatar
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    Quote Originally Posted by xsriel View Post
    1. what is the greatest perfect square that is a factor of 7!?


    2. A standard six-sided die with its faces numbered 1-6 is rolled once, and a dime is tossed twice, Whats the probability of rolling a number less then 3 and tossing a tail? exspress ur answer as a common fraction

    i know this one is easy i got 2/6 and 1/2 but am i supposed to make it one answer or is that my answer?

    3. When converted to be in the same unit of measure, what is the ratio of 4cm to 1km? Exspress ur answer as a common fraction?

    4. In 30 years Sue will be 4 times as old as she is now. how old is she now?
    3.One kilometer is 1000 meters and 1 meter is 100 centimeters, so 1 km = 100,000 cm. The ratio 4 cm to 1 km becomes 4 cm to
    100,000 cm, which written as a common fraction, is 1/25,000
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  9. #9
    Senior Member euclid2's Avatar
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    Quote Originally Posted by xsriel View Post
    1. what is the greatest perfect square that is a factor of 7!?


    2. A standard six-sided die with its faces numbered 1-6 is rolled once, and a dime is tossed twice, Whats the probability of rolling a number less then 3 and tossing a tail? exspress ur answer as a common fraction

    i know this one is easy i got 2/6 and 1/2 but am i supposed to make it one answer or is that my answer?

    3. When converted to be in the same unit of measure, what is the ratio of 4cm to 1km? Exspress ur answer as a common fraction?

    4. In 30 years Sue will be 4 times as old as she is now. how old is she now?
    4.If x is Sue’s age now, x + 30 = 4x. When we solve for x we find that Sue is now 10 years old.
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  10. #10
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    Quote Originally Posted by euclid2 View Post
    2.There are two numbers less than 3 on a standard die (namely, 1 and 2), so there is a 2/6 chance of rolling one of those. There is also a
    1/2 chance of tossing a tail on the dime. The probability that these two things will happen together is 2/6 × 1/2 = 1/6.
    oh so 144 is the answer? xD i had that in class and she said it was rong xD
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  11. #11
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    Quote Originally Posted by euclid2 View Post
    4.If x is Sue’s age now, x + 30 = 4x. When we solve for x we find that Sue is now 10 years old.
    if u don't mind can u just show me the work
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  12. #12
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    Quote Originally Posted by xsriel View Post
    oh so 144 is the answer? xD i had that in class and she said it was rong xD
    quoted the rong one but ok thanks. and my dad just needs to see the work
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  13. #13
    Senior Member euclid2's Avatar
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    Quote Originally Posted by xsriel View Post
    oh so 144 is the answer? xD i had that in class and she said it was rong xD
    hmm, i am puzzled now, perhaps we can wait for another to respond, i do not see any other possibility than 144, sorry
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  14. #14
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    Quote Originally Posted by xsriel View Post
    if u don't mind can u just show me the work
    x+30=4x
    subtract x form each side
    30=4x-x
    30=3x
    Solve for x, so divide by 3
    30/3=x
    10=x
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