1 . 9x2+16y2

• A. $6xy$
• B. $12xy$
• C. $24xy$
• D. $144xy$

Answer: Option C

Explanation:

2 . y=x-5

• A. $\left(\frac{-16}{5},\frac{9}{5}\right)$
• B. $\left(\frac{16}{5},\frac{-9}{5}\right)$
• C. $\left(\frac{16}{5},\frac{9}{5}\right)$
• D. $\left(\frac{-16}{5},\frac{-9}{5}\right)$

Answer: Option C

Explanation:

3 . 9x2+16y2

• A. $6xy$
• B. $12xy$
• C. $24xy$
• D. $144xy$

Answer: Option C

Explanation:

4 . 9x2+16y2=144

• A. $\pm 3$
• B. $\pm 4$
• C. $\pm 5$
• D. $\pm 6$

Answer: Option C

Explanation: