Question

AEHS – Algebra – Review Solve the following problems: 1. Evaluate: X2 + 5X-8 For X = 2 2. Evaluate: 5X + 2y for x = 4, y = 3 3. Solve: X + 7 = 20 4. Solve: 6X = 30 5. Solve: 2X – 5 = 7 6. X/2 + 1 = 6. 7. 3m+4=25 8. |X-4|=10 9. Fine the mean, Median, Mode and Range of 6, 7, 3, 8, 13, 3, 9 10. Fine the sale price if the original price is $150 and Mark up 60%. 11. Fine the sale price if the original price is $90 and discount is 20%. 12. Fine the total cost if the original price is $120 and sale tax is 7%.

Answer 1

Question 1

$\text{Evaluate x}^2\text{ + 5x - 8 for x = 2}$

Substitute x in the expression

$\begin{gathered} =2^2\text{ + 5 }\times\text{ 2 - 8} \\ =4\text{ + 10 - 8} \\ =14\text{ - 8} \\ =6 \end{gathered}$