An altitude is drawn from the vertex of an isosceles triangle, forming a right angle and two congruent triangles. As a result, the altitude cuts the base into two equal
segments. The length of the altitude is 21 inches, and the length of the base is 18
inches. Find the triangle's perimeter. Round to the nearest tenth of an inch.

P = 63.6 inches

Step-by-step explanation:

you need to find the length of the third side:

9² + 21² = c²

81 + 441 = c²

c² = 522

c =

c ≈ 22.8

P = 18 + 2(22.8)

P = 63.6 inches

answer: y=4000x+14000

step-by-step explanation:

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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