There are a total of 91 students in a drama club and yearbook club. The drama club has 19 more students than the yearbook club. How many students are in the drama club? The yearbook club?

55 in drama and 36 in yearbook.

Step-by-step explanation:

You have a total of 91 students in 2 classes, with drama having 19 more students. The formula for this is x+x+19=91. Combining like terms gives us 2x+19=91. Subtract both sides by 19, which gives us 72. Then divide by 2 which gives us 36. But, we are not done yet. you have the number of people in yearbook, but we still need to find out how many are in drama. to do that, just add 19 which gives us 55 students in drama. Hope this helps!

1gm = 1000mg so 0.1gm = 1000mg

first, convert the weight to kg

160lb * 1kg/2.2lb = 72.7kg

next, the dose

72.7kg * 100mg/kg = 7270mg

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240