Robert used 34 grams of iron filings in his second experiment. this is 16 grams more than twice the number of grams he used in his first experiment. how many grams of iton filings did he usein his experiment.

34=2x + 16

18=2x

x=9

Robert used 9 grams of iron filings in his first experiment.

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation: