I A, B & C form a triangle where Z BAC = 90°. AB = 2.9 mm and CA = 12.4 mm,
Find the length of BC, giving your answer rounded to 1 DP.
BC =

9514 1404 393

     BC ≈ 12.7 mm

Step-by-step explanation:

The Pythagorean theorem tells you ...

  AC² +AB² = BC²

  BC = √(AC² +AB²) = √(12.4² +2.9²) = √162.17

  BC ≈ 12.7 . . . mm

answer:

3 bags of apples and 2 bags of oranges.

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18