SAT Prep 2

Option D is correct

Explanation:

A: This finding would actually weaken the hypothesis. The hypothesis is that the sail improved the dinosaur’s ability to chase quick, evasive prey. This finding suggests that the sail slowed the dinosaur down, which would likely make it less effective at catching quick, evasive prey.

B: This finding wouldn’t necessarily support the hypothesis. The hypothesis is that the sail improved the dinosaur’s ability to chase quick, evasive prey. It’s unclear how the sail displacing more water would relate to that hypothesis—it doesn’t seem to be relevant.

C: This finding wouldn’t necessarily support the hypothesis. The hypothesis is that the sail improved the dinosaur’s ability to chase quick, evasive prey. It’s unclear how the difference in battery power between the models would relate to that hypothesis—it doesn’t seem to be relevant.

D: This finding would most strongly support the hypothesis. The hypothesis is that the sail improved the dinosaur’s ability to chase quick, evasive prey. This finding suggests that the sail helped the dinosaur make sharp turns more quickly, which supports that hypothesis.

Option C is correct

Explanation: Substitute y in the second equation for -3x: 4x-3x=15. Now solve for x: x=15