If w<0 and if z > 0, which expression must be positive?
A. w- 2²
B. z+w2
c. 22= w
D. 2-w2

Mindy bought 5/8 pound of almonds and a 3/4 pound of walnuts. which pair of fraction cannot be used to find how many pounds of nuts she bought in all.

Place the following steps in order to complete the square and solve the quadratic equation,

Apossible wavelength for the color blue is 0.000000492 meter. which of the following is a reasonable estimate for this wavelength for the color blue? a. 5 × 10-6 m b. 5 × 107 m c. 5 × 10-7 m d. 5 × 106 m