Math

posted by .

Here's a couple examples from my homework. If someone could help me solve this by showing me step by step what to do, it would be so great. Also, any websites that would show me the steps too. Thanks so much. I have to get all my work done by tomorrow and I'm kinda freaking out, lol.

8-(-2/3)+7-(1 2/3)+5=

(-3)-2.2-9-(-12)=

-2/7-2 3/5+1 2/7-(-2/5)=

If you just explain one of the problems, that's awesome! you don't have to do all three. Sorry if it's a lot but it's different areas I'm having trouble with. Thanks a million! :)

  • Math -

    I worked this in two different orders to make sure I was right.

    8-(-2/3)+7-(1 2/3)+5=

    8 + 2/3 + 7 - 1 2/3 + 5 =
    15 + 5 - 1 = 19

    8 2/3 + 5 1/3 + 5 = 19

  • Math -

    Ok, I'll do the 1st one;

    first of all 8 - (-2/3)
    well, minus times minus = plus
    [e.g. -4*-4 = 16]

    so that becomes 8 + 2/3
    Now we need to do the same with the rest of the equation to get

    8 + 2/3 + 7 - 1 2/3 + 5
    You how have to sort out 1 2/3 which is 1 and 2/3 which equals 5/3

    So now we have 8 + 2/3 + 7 - 5/3 + 5
    Now we add the fractions together and the whole numbers together separately to get

    (8 + 7 + 5) + (2/3 - 5/3)
    which becomes
    (20) + (-3/3)
    which becomes
    20 - 1 = 19
    So 19 is the answer.

    I hope that helps

  • Math -

    you have to remember that when you subtract a negative, you really add it - the () were used in your problems to section off numbers

    8-(-2/3) would be the same as 8 + 2/3

  • Math -

    just in case you're still stuck on the 2nd & 3rd ones - one more thing to remember: when you add/subtract fractions, they need common denominators

    #2) (-3)-2.2-9-(-12)=
    (-3) - 2.2 = -5.2 - 9 - (-12)
    -5.2 -9 = -14.2 -(-12)
    *remember the -(-12) is really adding
    -14.2 + 12 = -2.2

  • Math -

    #3) - this one needs common demoninators

    -2/7-2 3/5+1 2/7-(-2/5)=

    -2/7 will become -10/35
    2 3/5 will become 2 21/35
    1 2/7 will become 1 10/35

    -10/35 - 2 21/35 = -2 31/35

    -2 31/35 + 1 10/35 is really subtracting and keeping the sign from the higher number (negative here)

    = -1 21/35 -(-2/5) *you'll need to have common denominators here too - it might be easier to go back to the 5ths

    -1 21/35 becomes -1 3/5

    -1 3/5 - (-2/5) =
    -1 3/5 + 2/5 =
    -1 1/5 is your answer

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    can someone explain step by step to solve system equations and example ill show here 3x+4y=-2 x=-2y
  2. math

    how do you solve the exponential equation, 12^x = 14^3x?
  3. Algebra

    F=9/5C+32 Solve for C if someone could explain in a step by step way that would be great!
  4. 7th grade math

    How would you solve the problem below using subsitution method?
  5. Math

    Can someone show me step by step on how to factor/solve this problem explaining the steps?
  6. math

    Can someone please show me step by step how to solve this, I've been stuck. Find the common ration r of the geometric series an that satisfies the following conditions: c=4, S=16 I would reallyy appreciate it if someone could help …
  7. Algebra 1--Step-by-Step

    Can someone show me how to solve these step-by-step?
  8. Math

    Find the value of the following expression: (2^8 x 5^-5 x 19^0)^-2 x (5^-2/ 2^3)^4 x 2^28 I tried to do a couple steps to solve the question but I don't know if its right. Step 1:(2^8 x 5^-5 x 19^0)^-2 x (5^-2/ 2^3)^4 x 2^28 Step 2: …
  9. math

    Is the function a polynomial function? Why or why not?
  10. Math

    I need help solving the problem not the answer. (Multiple Choice) The steps below show the incomplete solution to find the value of x for the equation 7x + 8 − 3x = −6 + 10: Step 1: 7x + 8 − 3x = −6 + 10 Step 2: 7x + 8 − …

More Similar Questions