Which numbers can best be used to estimate 3,872 + 5,109? choose exactly two answers that are correct. a 3,000 b 4,000 c 5,000 d 6,000

The answers are,

B. 4,000 and C. 5,000

If you round the numbers to the closest thousand, the 3,800 becomes 4k, and the 5,100 becomes 5k.

-Mabel <3

Answer

B) and C)

Step-by-step explanation:

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