Answer:
The standard form of y = x + 7 is 2x + 3y = 21 ⇒ A
Step-by-step explanation:
The standard form of the linear equation is ax + by = c, where a, b, and c are integers
∵ y = x + 7
→ Multiply each term by 3 to cancel the denominator
∴ 3(y) = 3( ) x + 3(7)
∴ 3y = -2x + 21
→ Add 2x to both sides to move x from the right side to the left side
∵ 2x + 3y = -2x + 2x + 21
∴ 2x + 3y = 21
∴ The standard form of y = x + 7 is 2x + 3y = 21
Answer:
Option D.
or
Step-by-step explanation:
<u><em>The correct question in the attached figure</em></u>
we have
----> inequality A
subtract 5 both sides
divide by 3 both sides
The solution of the inequality A is the interval [-2,∞)
----> inequality B
adds 7 both sides
divide by -2 both sides
Remember that when you multiply or divide both sides of an inequality by a negative number, you must reverse the inequality symbol
The solution of the inequality B is the interval (-∞,-6]
therefore
The solution of the system is
or