SAT Math: Advanced Math

In the equation $64x^2 + bx + 25 = 0$, $b$ is a constant. For which of the following values of $b$ will the equation have more than one real solution?

The function $f$ is defined by $f(x) = 9(4)^{x}$. If $g(x) = f(x+2)$, which of the following equations defines the function $g$?

$p(t) = 90,000(1.06)^{t}$

The given function $p$ models the population of Lowell $t$ years after a census. Which of the following functions best models the population of Lowell $m$ months after the census?

Which expression is equivalent to $12x^3 - 5x^3$?

x = 8a(b+9) The given equation relates the positive numbers $a$, $b$, and $x$. Which equation correctly expresses $a$ in terms of $b$ and $x$?

$\text{c} - 7 = 25p + k$

The given equation relates the positive numbers $c$, $p$, and $k$. Which equation correctly expresses $c$ in terms of $p$ and $k$?