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Factor numerator: x2−9=(x−3)(x+3)x^2 − 9 = (x − 3)(x + 3). Cancel x−3x − 3, leaving x+3x + 3. Correct = B. Options A, C, D reflect common factoring or cancellation errors. ACCUPLACER AAF stresses factoring identities and simplifying rational expressions.

The sentence contrasts difficulty (“lasted longer than expected”) with achievement (“discovery… was considered a success”). The point is that success was achieved despite delays. Option B is correct. ACCUPLACER Reading often requires identifying main ideas across contrasting clauses.

Subject = “members,” plural. Verb must be plural: “disagree.” Option A incorrectly uses singular. Options C and D are ungrammatical. Writing section stresses subject–verb agreement accuracy.

Subject = “committee,” a singular collective noun. Correct verb: “has agreed.” Option A incorrectly uses plural. Options C and D change tense. Writing section regularly tests subject–verb agreement in collective subjects.

Equation in slope-intercept form: y=mx+by = mx + b. Here, slope = 4, intercept = −3. So equation is y=4x−3y = 4x − 3. Correct = A. Distractors reverse slope or sign. QAS emphasizes slope-intercept understanding.