Maxine needs a necklace 42 beads long. How many blue and how many blacks will she need?

Complete question :

Maxine wants a necklace 42 beads long the ratio of blue to black beads is 2:5 how many blue and bkack beads does she need to complete the necklace?'

12 blue beads

30 black beads

Step-by-step explanation:

Given that :

Total number of beads = 42

Sharing ratio = 2:5

Sum of ratios = 2 + 5 = 7

Number of Blue beads :

(2/7) * 42 = 84 / 7 = 12

Number of back beads :

(5/ 7) * 42 = 210 / 7 = 30

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

the answer would be 484

step-by-step explanation:

just multiply 0.484 times 1,000 (formula)