Meowkitty7067 Meowkitty7067

20-11-2017
SAT

contestada

If 3x+2y=11 and 2x+3y=17, what is the average of x and y?

A- 2.5

B- 2.8

C- 5.6

D- 5.8

E- 14

Respuesta :

02-04-2019

3x + 2y = 11

2x + 3y = 17

-------------------- We add the equations

5x + 5x = 28

5(x + y) = 28

x + y = 28 / 5 | ÷ 2

(x + y) / 2 = (28 / 5) / 2

(x + y) / 2 = 28 / 10

Average = (x + y) / 2 = 2.8

Corect answer: B

.

Answer Link

Otras preguntas

What is the name of the curve labeled as letter A

Answer the graph and the following questions

Discuss molecular weight of a polymer, using the manual and the Internet as needed. Describe how the molecular weight of the CMC samples varies, despite having

Determine whether each of these statements is true or false: (a) 0 ∈ ∅ (b) 0 ⊆ {0} (c) ∅ ∈ {∅, {∅}} (d) {∅} ∈ {∅} (e) {∅} ∈ {{∅}} (f) {∅} ⊆ {{∅}} (g) {∅} ⊆ {∅,

Choose the right answers

Which rhetorical device is used in this excerpt the republic by Plato

3x+5=-x-7 find the answer of x

Leila took out an 80/20 mortgage to buy a $350,000 house. The first (80%) mortgage has an interest rate of 3.8%, and the second (20%) mortgage has an interest r

Matching: (Match the best term with the following statements ;Use Capital letters to respond ) A. neoclassicism B. romanticism C. realism D. naturalism E. expre

what does this sentence represent of these 3 words reduse, reuse, and recycle "think before you buy any product. do you really need it"?