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Math help plz check my answers!

posted by on .

1. Write the ratio in the simplest form.
50:10

25:5
10:2
5:1
1:5
2. Solve the following proportion.
r/5= 9/21

r = 9
r = 2.14
r = 11.66
r = 37.8
3. A recipe calls for 3 cups of flour to make 3 dozen cookies. Use the proportion to calculate how much flour is needed to make 9 dozen cookies.

three cups over three dozen equals x cups over nine dozen

6 cups
3.5 cups
9 cups
12 cups
4. Jake sold 39 tickets to the school fair, and Jeanne sold 12 tickets. What is the ratio, in simplest form, of the number of tickets Jeanne sold to the number of tickets Jake sold? (
thirteen over four

thirty-nine over twelve
twelve over thirty-nine
four over thirteen

5. In 10 months, 62.6 gallons were used. Find the unit rate. (1 point)
0.16 gallons/month
10 gallons/month
6.3 gallons/month
626 gallons/month
6. You pay $2.97 for 3 cookies. What is the unit price? (1 point)
$0.97 per cookie
$0.99 per cookie
$1.00 per cookie
$2.97 per cookie

My answers:

1. 10:2
2.?
3. 3.5
4. 4/ 13
5.6.3
5.?

Plz, plz help me.....

  • Math help plz check my answers! - ,

    1. No.
    50:10 = 5:1

    2.
    r/5= 9/21
    Cross multiply and solve for x.
    21r = 45
    r = 45/21
    r = 2.1429

    3. No.

    4. No.

    5. Right

    6. 2.97 / 3 = ?

  • Math help plz check my answers! - ,

    1.
    10:2 is not in lowest terms, both numbers divide by 2
    10:2
    = 5:1

    2.
    r/5= 9/21
    r = 45/21 = 15/7 which is appr 2.143
    They should have given 15/7 as the correct choice,
    the rounded off number is not exact.

    3. puzzled by your choice.

    it takes 3 cups to make 9 dozen
    so it takes 9 cups to make 9 dozen

    4.
    39/12 , this fraction does not reduce any more

    5. 62.6 gallons/10 months = 6.26 gallons/month
    (you had that one right, finally!)

    6. If 3 cookies cost $2.97 then
    1 cookie costs 2.97/3 or 99 cents per cookie

    Wow, 1 out of 6!
    Looks like some major study time and review is needed.

  • Math help plz check my answers! - ,

    Looks like an attitude check is needed aswell.

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