Write a proportion that could be used to solve for each variable. Then solve.
2.7 centimeters in 3 seconds
x centimeters in 4 seconds
a. 2.7/3 = x/4; x = 3.3 c. 2.7/4 = x/3; x = 2
b. 2.7/3 = 4/x; x = 4.4 d. 2.7/3 = x/4; x = 3.6

last one.

step-by-step explanation:

last one.

generally speaking, the others follow some sort of pattern that correlates to either linear (looks like a straight line) or sinusoidal (looks like an s).

the last one is just a random cloud of points that doesn't correlate to any particular known order.

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