Why must each class interval in a grouped frequency distribution be the same size? So that cumulative frequencies can be totaled correctly To ensure the graph bars will be proportional and accurate Because the data must be normally distributed To highlight which categories have the highest frequency

Unit Exam - Radicals Simplify the following radical expression. $3\sqrt {15}\cdot 2\sqrt {5}$ $[?]\sqrt {[\quad ]}$ $\square $

Using divisibility tests, solve parts (a) through (c)below. a. Can 186 passengers be assigned to 3 flights so that each flight has the same number of passengers? Yes No

A) \( \begin{aligned} x+2 y-3 z & =-2 \\ x-y+z & =-1 \\ 3 x+4 y-4 z & =4\end{aligned} \)

8. Solve the following trig equation $10sin(x-2)=-7$ $\square $

Use the quotient rule to find the derivative of the following. $y=\frac {x^{2}-2x+5}{x^{2}+7}$ $\frac {dy}{dx}=\square $

Use the converse of the Pythagorean Theorem to determine whether the triangle with the given vertices is a right triangle. $(1,4),(4,2),(6,6)$ a. Yes,it is a right triangle. b. No, it is not a right triangle. Please select the best answer from the choices provided A B

Find the exact value of $tan[2sin^{-1}(-\frac {3}{5})]$ $tan[2sin^{-1}(-\frac {3}{5})]=\square $ (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

Use the trigonometric function values of the quadrantal angles to evaluate. $3cot90^{\circ }-4csc270^{\circ }$ $3cot90^{\circ }-4csc270^{\circ }=\square $ (Simplify your answer.Type an integer or a fraction.)

For $f(x)=\frac {x}{x+1}$ and $g(x)=\frac {7}{x}$ find a. $(f\circ g)(x)$ b. the domain of $f\circ g$ a $(f\circ g)(x)=\square $ (Simplify your answer.)

If the correlation coefficient is 1, then the relation is a __ perfect positive correlation perfect negative correlation weak negative correlation weak positive correlation