Calculate using rounding off and compensating. Use you check whether your answer is correct.
a) 198+ 217
b) 257 - 137
C) 15
d) 35 x 9
e) 396 20
0)64
For each problem:​

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint. how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is