1. Which expression means the product of 125 and a number? \( \begin{array}{llll}\text { (a) } 125 x & \text { (b) } 125+x & \text { (c) } 125-x & \text { (d) } 125 \div x\end{array} \)

If \( p(x)=2 x^{2}-4 x \) and \( q(x)=x-3 \), what is \( (p \circ q)(x) ? \) \( 2 x^{2}-4 x+12 \) \( 2 x^{2}-16 x+18 \) \( 2 x^{2}-16 x+30 \) \( 2 x^{2}-16 x+15 \)

7. Resuelvan a. \( (-6+1)^{2} \cdot(-2)+\sqrt{10^{2}-8^{2}}-(-6+10) \cdot(-2)^{3}= \) b. \( \sqrt{8} \cdot \sqrt{32}+\left(-2^{2}-8^{0}\right) \cdot 3+\left(5-3^{2}\right)^{3}= \) c. \( \sqrt{13^{2}-5^{2}}+(11-7 \cdot 2)^{3} \cdot(-2)-(-9+5) \cdot(-2)^{2}= \) d. \( \left(-24 \cdot 3-7^{0}\right) \cdot 2+\sqrt{7} \cdot \sqrt{28}+\left(12-2^{4}\right)^{3}= \) e. \( \sqrt[y]{17 \cdot(-2)^{5}-(-2)^{5}}-\left(-6^{3}+(-6)^{0}\right):(-5)+(-7)^{2}= \) f. \( -144:(-2)^{3}:(-3)^{2}+\left(7 \cdot 2^{3}-60\right)^{3}+\sqrt[3]{2401}: \sqrt[2]{7}= \)

Solve for the variable: \( -6>t-(-13) \)

b. \( -3 a^{2} b c^{3}+3 a^{2} b c^{3} \)

3) \( \frac{28 k^{2}+28 k}{14 k+14} \cdot \frac{7 k+6}{7 k^{2}-22 k-24} \)