If n is rational, it means that
Therefore when we do n² we can write it as
Remember that the product of two integer numbers is also an integer, therefore we can guarantee that
Then we can confirm that n² is the quotient of two integers and the denominator is not zero, therefore, n² is always rational, it cannot be an irrational number
3. 5x5x5. i am not sure if i am correct but i am assuming it is that.
We can first find how much the ribbon cost for 1m by setting an equation.
Let $y be the cost for 1m:
0.8y = 5.60
y = 5.60 ÷ 0.8
y = 7
Now that we know 1m of ribbon cost $7, we can proceed to find how much 3.25m ribbon cost by mutiplying the length with the cost:
7 x 3.25
=$22.75
Therefore the answer is $22.75.
Hope it helps!
Do PEMDAS
so do 4-2 which is 2
2 x 9 is 18 x 10 is 180
45 - 8 is 37
180 divided by 37 is 4.9
You can round $10.95 to $11 so 11x8=88
Emma made about $88
