Questions in mathematics

Questions in mathematics

[Answered] Determine the $n$-intercept of the graph of the car value equation $V=-1385 n+18,790$. What is the practical significance of the $n$-intercept? Be sure to include units. a. The car is worth $1385 after 14 years. b. After 14 years, the car is worth $0. c. The car is worth $14.

[Answered] Show that [tex]P(2)=0[/tex] for [tex]P(x)=2 x^3-x^2-6 x[/tex].

[Answered] $1 \frac{3}{5}-\left(-7 \frac{4}{5}\right)$

[Answered] Fruit Prices | Fruit | Cost (per pound) | | -------- | ---------------- | | apples | $1.89 | | cherries | $5.28 | | grapes | $2.78 | Karla is making fresh grape jelly. She buys 18.7 pounds of grapes. Estimate the total cost. $2.78(18.7) Karla will spend about $\square$ on grapes.

[Answered] Which of the following is NOT a component of the simple linear regression model? A. Dependent variable (y) B. Independent variable (x) C. Error term (ε) D. Regression coefficient (α)

[Answered] The scores of 20 students in a Math quiz are as follows: 25, 33, 35, 45, 34, 26, 29, 35, 38, 40, 45, 38, 28, 29, 25, 39, 32, 37, 47, 45 Calculate the mean, median, and mode of these scores.

[Answered] Simplify the following expression: $\left(\frac{1}{7} x+\frac{3}{8}\right)+\left(\frac{2}{9} x-\frac{1}{8}\right)$ A. $-\frac{5}{63} x+\frac{1}{2}$ B. $\frac{23}{63} x+\frac{1}{2}$ C. $\frac{3}{16} x+\frac{1}{4}$ D. $\frac{23}{63} x+\frac{1}{4}$

[Answered] The cost of 18 small chocolate cakes is the same as the cost of 7 large chocolate cakes. Find the cost of a small chocolate cake.

[Answered] Which expression is equivalent to [tex]$\tan (x-\pi)$[/tex]? [tex]$\frac{\tan (x)-\tan (\pi)}{1-(\tan (x))(\tan (\pi))}$[/tex] [tex]$\frac{\tan (x)-\tan (\pi)}{1+(\tan (x))(\tan (\pi))}$[/tex] [tex]$\frac{\tan (x)+\tan (\pi)}{1-(\tan (x))(\tan (\pi))}$[/tex] [tex]$\frac{\tan (x)+\tan (\pi)}{1+(\tan (x))(\tan (\pi))}$[/tex]

[Answered] Work out the value of [tex]$x$[/tex]. [tex]$x-5: 2 x$[/tex] is equivalent to [tex]$1: 3$[/tex]