The value of y varies directly with x. if x=6, then y=21. if x=10,what would be the value of y

When x = 12, y = 4.

Explanation:

If  y  ∝  x  we can write that  y = k ⋅ x  where k is a constant of proportionality.

Using the values given:

6 =18 ⋅ k ⇒ k = 1 3  y = 1 3 ⋅ 12 = 4

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

the car was traveling 40 mph before it started skidding. ( 2 points ) 17. was the driver were her brakes working at 75% efficiency or better? ( 2 points ) yes 29.

step-by-step explanation: