In a class of 60 students 8 will be left handed. If a class includes 20 lefties, estimate how many students are in the class.

150

Step-by-step explanation:

60/8=x/20. Solve for x. So cross multiply 20•60=1200 divided by 8=150

5.25 ounces

step-by-step explanation:

divided 3/4 and 6

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116