Multiply 2.1 and the number r results in 6.174. what is the value of r?

2.1(r) = 6.174

Isolate r. divide 2.1 from both sides

2.1r/2.1 = 6.174/2.1

r = 2.94

2.94 is your answer for r

hope this helps

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