tomas orders a meal that costs $7.89. Lisa's meal costs $9.05. About how much is the combined cost of their meals?

$17

Step-by-step explanation:

This is a question on Estimation - which is a very important skill!

the first meal was $7.89, which is roughly $8the second meal was $9.05, which is roughly $9

good luck on your studies! : )

david edward.

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