So here first you have to have same denominators to subtract and add.
to make same denominator you have to multiply something to them which meets up to their lowest common multiple (LCM). so here the easiest thing is multiply each denominator to the other but remember you have to multiply them to the numerator too.
3×9/5×9-2×5/9×5
so it becomes
27/45-10/45
17/45
as you cant bring to its simplest form since the answer in a prime no. leave it like that.
Answer:
$175
Step-by-step explanation:
susan babysit for 2×4+6=14 hours a week
so she works 14×5=70 hours in 5 weeks
in a hour she earn $2.50
in 70 hours she earn 2.50×70=$175
<em><u>Answer: 10.</u></em>
<em><u /></em>
<em><u>Step-by-step explanation:</u></em>
<em><u>DIVISION. 120/12.</u></em>
<em><u>That is hard! Here's a trick.</u></em>
<em><u>12x9= 99=9=108. Or 12x6=66+6=72.</u></em>
<em><u>We will stick with 12x9, that equals 108.</u></em>
<em><u>We should add another 12 until we get to 120. </u></em>
<em><u>108+12=120. That is 10 times. The trick was...</u></em>
<em><u>dividing by 12 is hard, so lets say 12x4. I can put 4 and 4 together.</u></em>
<em><u>44 then and another 4. That is 48. So 12x4=48.</u></em>
<em><u /></em>
Answer:
4
Step-by-step explanation:
Multiply 45 by 1/5, or 0.2, and you will get an answer of 9, which is the amount of tulips that were yellow. You will know that you need to multiply 45 by either 1/5 or 0.2 because you can make a fraction 20/100 and simplify it to 1/5, or you can move the decimal point in 20.% two times to the left getting the decimal to divide the amount of tulips by
