MaxWong

8 5/6 + 4 7/10

= 8 25/30 + 4 21/30

= 12 46/30

= 13 16/30

= 13 8/15

$4\frac{11}{12}+5\frac{8}{9}\\ =4\frac{33}{36}+5\frac{32}{36}\\ =9\frac{65}{36}\\ =10\frac{29}{36}$

25 - 1/2

= 25 - .5

= 24.5

= 24 1/2

OR

= 49/2

Good work Guest #1, but that lump of numbers though.......

pi approx = 22/7 OR 3.14

$-\frac{2}{3}+y=\frac{1}{7}\\ y=\frac{1}{7}+\frac{2}{3}\\ \;\;=\frac{17}{21}$

The 2 events are irrelevant.

If it's not a horse crossing the road, the road will be the same length as the horse is crossing the road.

$\dfrac{6}{2(1+2)}\\ =\dfrac{6}{2(3)}\\ =\dfrac{6}{6}\\ =1$

$\sin x = 0.25\\ x=\sin^{-1}0.25\\ \;\;\approx14.47751218593^{\circ}$

Use PEDMAS.

Notice that Division and Multiplication can be done in 1 step together. Same as Addition and Subtraction.

$18+36\div 3+(9-6)^2$

$=18+36\div 3 + 3^2$P(arentheses)

$=18+36\div 3 + 9$E(xponents)

$=18+12+9$D(ivision) and M(ultiplication)

$=39$A(ddition) and S(ubtraction)

$\dfrac{3}{5r}=-2\\ 3=-10r\\ r=-\dfrac{3}{10}$

Or you mean (3/5)r=-2?
$\dfrac{3}{5}r=-2\\ r = 2\times \dfrac{5}{3}\\ \;\;=\dfrac{10}{3}$