Use a Graphing Calculator to Solve the System $$\frac { 9 } { 7 } x + y = 5$$

question 480

Multiple Choice

Use a graphing calculator to solve the system. Express solutions with approximations to the nearest thousandth.
- $$\frac { 9 } { 7 } x + y = 5$$
$0.4 x - y = 3$

• A) \(\{ ( 4.746 , - 1.102 ) \}\)
• B) \(\{ ( 2.258,2.097 ) \}\)
• C) \(\varnothing\)
• D) \(\{ ( - 2.947,8.789 ) \}\)

---

Definitions:

Carbonate Mineral

is a type of mineral consisting primarily of carbonate ions in combination with metal ions, common in rocks like limestone and dolomite.

Effervesces

Describes the process of fizzing or bubbling, often due to a chemical reaction releasing gas.

Dilute HCl

A solution of hydrochloric acid and water that is less concentrated than the acid's pure form, often used in chemical reactions and tests.

Silicate Mineral

Refers to minerals composed of silicate groups, which are compounds of silicon and oxygen, often forming the majority of the Earth's crust.