Which expression represents the product of x^3+2x-1 andx^4-x^3+3 A) x^7 - 2x^4 - 3

B) x^12 - x^9 + x^4 + 2x^3 + 6x - 3

C) x^7 - x^6 + 2x^5 - 3x^4 + 4x^3 + 6x - 3

D) x^4 + 2x + 2

An alien has just landed from the planet, iksnimak. he would like to leam how to add two fractions when thedenominators are the same. write a paragraph that explains to our alien friend, in your own words, the detailsabout how to add the fractions, how to change the result to a mixed number, and how to reduce the fractionpart. use this problem as your example: the two fractions are 5/8 & 7/8

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed