Answer these in scientific notation with work shown, adding scientific notation.

1.8 x 10^5 + 2.8 x 10^1

9 x 10^-4 + 4 x 10-6

2.5 x 10^2 + 8.4 x 10^2

3.9 x 10^-1 + 1.6 x 10^-2

7 x 10^-2 + 9.57 x 10^-3

i dont know sorry

step-by-step explanation:

deez nu tz

step-by-step explanation:

on a coordinate grid, point a is at (−4.0, −2.4) and point b is at (4.0, −2.4). point b is a reflection of point a across the –axis. input either a lowercase x or i think is the right awnser

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