Pinellas County Schools GRADE 8 PRE-ALGEBRA Unit 5; Solving Equations & Inequalities Question Joshua has solved an equation from his homework by using 4 steps in which step did Joshua make mistake? 1 Original Equation: (4x + 2) + 3(--2x + 5) = 25 a. Step 1: 4x + 2 - 6x + 15 = 25 b. Step 2: - 2x + 17 = 25 Step 3: -2x = 8 d. Step 4: 2 Solve for the unknown variable:

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

Situation: . find the substance's half-life, in days. round your answer to the nearest tenth. a 11 gram sample of a substance that's used to treat thyroid disorders has a k. value of 0.1247. enter the correct answer n - noekt done no - initial mass (at time t = 0) n - mass at timet k a positive constant that depends on the substance itself and on the units used to measure time t= time, in days

15 points only answer if 100% sure when graphed, the x-intercept of a linear function is (-4,0), and the y-intercept is (0,12). which of the following equations represents the function? a. y + 12 = 5(x − 4) b. y − 4 = 4(x + 2) c. y − 6 = 3(x + 2) d. y + 6 = 2(x + 7)