Without graphing, determine whether the graph of the quadratic function opens up or opens down.f(x) = -4 + 3x2 - 5
A. opens down
B. opens up
Answer: B
Mathematics
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Solve the indicated system of equations algebraically.The area of a rectangular rug is 70 square feet and its perimeter is 38 feet. Find the dimensions of the rug.
A. 6 yd by 14 yd B. 5 yd by 13 yd C. 6 yd by 13 yd D. 5 yd by 14 yd
Mathematics
Tell whether the angle is acute, right, obtuse, straight, or reflex.
A. Obtuse B. Acute C. Straight D. Zero
Mathematics
Evaluate the function.f(x) = -4x - 7; f(-2)
A. 4 B. 28 C. 1 D. -7
Mathematics
Solve the equation after making an appropriate substitution.4x-2 - 15x-1 - 25 = 0
A. 
B. 
C. 
D. 
Mathematics