Answer the question.If the vertex of the graph of a quadratic function lies in quadrant I and the graph is concave up, how many x-intercepts does the graph have?
A. 0
B. 2
C. 3
D. 1
Answer: A
Mathematics
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Estimate. Choose a rounding digit that gives one or two nonzero digits.0.028 × 486.9
A. 150 B. 15 C. 1.5 D. 1500
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Decide if the statement is true or false.-(-7) > -21
A. False B. True
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Factor the trinomial, or state that the trinomial is prime.a2 + 3a - 28
A. prime B. (a - 4)(a + 7) C. (a + 4)(a + 1) D. (a + 4)(a + 7)
Mathematics
Solve the formula for the given variable.A = 2lw + 2lh + 2wh for w
A. w = 
B. w = A - 2lh - 2l - 2h
C. w = 
- 2lh
D. w = 
Mathematics