Write a word name for the number in the sentence.The control center was suddenly unable to track the satellite when it reached a distance of 128,615 miles from the earth's surface.

A. One hundred twenty-eight million, six hundred fifteen
B. Six hundred fifteen thousand, one hundred twenty-eight
C. One hundred twenty-eight thousand, six hundred fifteen
D. One hundred twenty thousand, eighty-six hundred, fifteen


Answer: C

Mathematics

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Find the gradient ?f.f(x, y) = -3xy2 + 6x2y

A. x(-3y + 12x)i + y(6x - 6y)j B. y(6y - 6x)i + x(-3x + 12y)j C. x(6x - 6y)i + y(-3y + 12x)j D. y(-3y + 12x)i + x(6x - 6y)j

Mathematics

Factor the trinomial containing two variables.x2 + 5xy - 14y2

A. (x + 7y)(x - 2y) B. (x - y)(x + 2y) C. (x - 7y)(x + 2y) D. (x - 7y)(x + y)

Mathematics

In the figure,? FAB =30°, ?CAB = 66°, ?GAD = 23°, BA ? EA and G and F are collinear.



(a) What is the measure of ?DAE?
(b) Name three pairs of supplementary angles in this figure.
(c) Name all of the pairs of complimentary angles in this figure.
(d) Name two adjacent angles in this figure.

Mathematics

Add and subtract as indicated. Simplify and leave the numerator and denominator in your answer in factored form. + 

A.
B.
C.
D.

Mathematics