I'm really behind on work. i will give 98 points .

1. −7≥13−5x
x≥−4
x≥4
x≤4
x≤−4
2. 5+d> 5−d
d> 0
d< −5
d> −10
d> 6
3. 3(n+5)≥3n+8
n≥7
no solution
n≥23
all real numbers

one the first one the sign flipped because you divided by a negative number, on the third one it was all real numbers because the coefficients of n (which was "3") are equal and 3n+15 is greater than or equal to 3n+8 no matter what number you put in

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it