23. holly is making bracelets to give to her four friends
to wear to the school dance. she wants to put at least 20
beads on each bracelet.
write and solve an inequality to find the minimum
number of beads holly should buy to make the bracelets.

80 beeds

Step-by-step explanation:

x >= 4*20

x >= 80

80

Step-by-step explanation:

let the min. no of beads she needs equal x.

Then x ≥ min. no of beads per 1 bracelet × the no of bracelets she's gonna make

∴ x ≥ 20×4

x ≥ 80

∴minimum number of beads holly needs is 80

answer: i don't understand it

step-by-step explanation: sorry

(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