-4x/5≥1/10
-8x≥1
x≤-1/8
x∈(-∞;-1/8]
I got 65/153 since you actually multiply by the reciprocal of the second fraction.
In the order of operation, multiplying or dividing don't take preference over the other. So with them, you work from left to right.
This means for this question, you first divide, then multiply.
D. The x and y values are both negative