Madame dubois bought 20 pearl necklaces for $500. becoming bored quickly, she sold 3/4 of them at $40 each. she sold the rest at cost price. how much money did she make?

Find cost of 1 necklace:

20 necklaces = $500

1 necklace = $500 ÷ 20 = $25

Find Sales of 3/4 of the necklaces:

3/4 of 20 = 3/4 x 20 = 15 necklaces

15 necklaces sold at $40 each = 15 x 40 = $600

Find Sales of the remaining necklaces:

20 - 15 = 5

5 necklaces sold at $25 = 5 x 25 = $125

Find profit:

Total Sales = $600 + $ 125 = $ 725

Total profit made = $725 - $500 = $225

She made $225

9) i can't see the angle so whatever it is just do this: cos(angle) x hypotenuse and then use that answer and they hypotenuse and plug it into this: (answer you just got)^2 + b^2 = (hypotenuse)^2. the first answer will be the answer of the adjacent side and the second answer after this equation will be the opposite side.

10) y = 14 x = √147 or 12.12435565

11) x = 4.8

12) x = 4.2

13) x = 9.3

14) pq: 13.2

qr : 17.6

angle p: 53º

15) angle c: 54.3º

angle a: 35.7º

16) h = 21040

v = 1841

step-by-step explanation:

10) 7/sin(30) = 14 = y

7^2 + b^2 = 14^2

49 + b^2 = 196

b^2 = 196 - 49

√b^2 = √147

x = √147

11) cos(70) x 14 = 4.788282007

x = 4.8

12) tan(25) x 9 = 4.196768923

x = 4.2

13) sin(31) x 18 = 9.270685348

x = 9.3

14) pq: sin(37) x 22 = 13.23993051

pq: 13.2

qr: cos(37) x 22 = 17.56998122

qr : 17.6

angle p: 180 - (37 + 90) = 53º

15) cos-1(7/12) = 54.31466529

angle c: 54.3º

angle a: 180 - (90 + 54.31466529) = 35.68533471

angle a: 35.7º

16) 4 x 5280 = 21120

cos(5) x 21120

h = 21039.63202

h = 21040

sin(5) x 21120

v = 1840.729287

v = 1841

17.08

correct me if i am wrong.