Multiply the expressions.(7x + 2y)(7x - 2y)
A. 49x2 + 28xy - 4y2
B. 49x2 - 4y2
C. 7x2 - 2y2
D. 49x2 - 28xy - 4y2
Answer: B
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Decide whether the given set of numbers is a group under the given operation.Whole numbers; addition
A. Yes B. No
Evaluate the expression for the given replacement values. Write the answer in simplest form.
for x = 
, y = - 
A. - 
B. - 
C. - 
D. - 
Determine whether or not the function is linear. If it is, determine the slope and interpret it.The height of an object t seconds after being dropped from an altitude of 249 feet is given by the function h(t) = -16t2 + 249.
A. Not linear B. Linear; -16; The height of the object increases 16 feet each passing second. C. Linear; -16; The height of the object decreases 16 feet each passing second. D. Linear; 249; The height of the object decreases 249 feet each passing second.
Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.
A. 16
B. 
C. 
D. 1