Li and Jen went shopping. . Li bought 5 pairs of earrings and 1 necklace for a total of $62.
• Jen bought 1 pair of earrings and 2 necklaces for a total of $43.
Each pair of earrings cost e dollars and each necklace cost n dollars. Which system of equations can be used to find the cost, in
dollars, of each pair of earrings and each necklace?
at or earrings

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.  

d 600 because 15*10*2=300

300+300=600

step-by-step explanation:

step-by-step explanation:

deez nut

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3