What is the answer? ( 2 - 1 ) ÷ ( - - ) =

The first step I would do is make each fraction an improper fraction if needed. 2 x 8 is 16, and 16 plus 1 is 17. 1 times 10 is 10, plus 3 is 13. Then, I would make each fraction have the same denominator. It may not be the smallest, but 120 will work. Now, solve. 255-156 is 99, keep the denominator the same. 160/130 has a greater absolute value than -12/120, so subtract 12/120 from 160/120 to get 148/120. Now to divide. Keep, change flip. 99*120 is 11880, and 120*48 is 5760. Simplify to get 59/288.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.