3

Set 5: Linear Functions (Advanced)

Explanation

Answer: A

Determine the x-intercept of the line 2x5y=102x - 5y = 10.

A.

55

✓ Correct
B.

2-2

C.

22

D.

5-5

Detailed Explanation

Choice A is correct. Choice A is the correct answer. Set y=0y=0 to find the x-intercept. 1. Method: The x-intercept occurs where y=0y = 0. 2. Substitute: 2x5(0)=102x=102x - 5(0) = 10 \rightarrow 2 x = 10. 3. Solve: x=5x = 5. Strategic Tip: Cover up the y-term (2x=102x = 10) to find the x-intercept instantly. Choice B is incorrect because it is the y-intercept. Choice C is incorrect because it divides 10 by 5 incorrectly or confuses variables. Choice D is incorrect because it confuses signs.

Key Steps:

The correct answer is 55

Why others are wrong:
B: Choice B is incorrect and may result from a calculation error.
C: Choice C is incorrect and may result from a calculation error.
D: Choice D is incorrect and may result from a calculation error.

🎯 Keep Practicing!

Master all sections for your best SAT score