One grain of this sand approximately weighs 7 x 10^-5g. how many grains of sand are there in 6300 kg of sand

After being rearranged and simplified, which of the following equations could be solved using the quadratic formula? check all that apply. a. 9% + 3x2 = 14 + x-1 b. -x+ + 4x + 7 = -32-9 c. 5x + 4 = 3x4 - 2 d. 2x2 + x2 + x = 30

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?