1) Write the following as an algebraic expression using x as the variable: Twelve less than six times a number A. 6x – 12 [(Six times a number means 6x, and twelve less mean -12)] B. –6x C. –12(6x) D. 12 – 6x 2) Write the following as an algebraic expression using x as the variable: The sum of a number and -8 A. -8 + x [(let x be the variable number, therefore sum of variable (x) and (-8) would be x-8 or -8 + x)] B. -8 - x C. x(-8) D. -8x 3) Write the following as an algebraic expression using x as the variable: Triple a number subtracted from the number A. x - 3x [(let x be the unknown number, and triple that number would be 3x. Triple a number (3x) has to be subtracted from the number, which is x, …show more content…
A. On the X-axis B. On the Y-axis C. Time is not plotted D. Either axis 18) Why are unequal class intervals sometimes used in a frequency distribution? A. To avoid a large number of empty classes B. To create variety in presenting the data C. To avoid the need for midpoints D. To make the class frequencies smaller 19) What is the slope of the line: 2y + 8x = 26 A. -4 B. 8 C. 1/4 D. 2 20) What is the slope of the line: 36x – 9y = 15 A. 4 B. 36 C. 3 D. -5/3 21) What is the slope of the line: 3x – y = 6 A. 3 B. 2 C. -1 D. ½ 22) Which statement is true of a regression line that is superimposed on the scatter plot? A. It is computed using the Ordinary Least Squares method. B. It guarantees the largest possible sample variance. C. It is computed using the maximum and minimum values. D. It guarantees that the slope and intercept are minimized. 23) Which of the following is observed in a scatter plot when there is an inverse relationship between x and y? A. Points create a horizontal line. B. Points are mostly in the lower left and upper right quadrants. C. Points curve up as it moves to the right. D. Points slope down as it moves to the right. 24) The number of hours spent studying appears to be highly correlated with the grade students earn in a class. Which variable would be the dependent
Halee set up a lemonade and cookie stand at the end of her street. She is selling lemonade for $0.25 per cup and cookies for $0.25 each. She sells 15 cookies and 35 cups of lemonade. Her total sales can be represented by the expression shown.
d) independent: a person’s height has nothing to do with the whether or not they can do math and vice versa
Since m = 7, I immediately know that (8m - 18) = 38, and (7m + 3) = 52.
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3. If a and b are positive integers such that a+b=9, then what is the value of b-9/4a ?
The scatter plot of Credit balance ($) versus Size show that the slope of the „best fit‟ line is upward (positive);this indicates that Credit balance varies directly with Size. As Size increases, Credit Balance also increases vice versa. Correct
h. Copy the value of an existing double variable z into an existing int variable x.
From graph a, we can see that there is a weak negative liner relationship between AGE and English scores; the correlation is -0.042; the equation of regression is ENGLISH=-0.0814809*AGE+24.469; the slope is -0.0814809 which is negative; when the predictor
8. Write a pseudocode statement that assigns the sum of 10 and 14 to the variable total.
The average of 3 consecutive even numbers is A. If next 5 even numbers are added, then what is the average of these 8 numbers?
STEP 3: This time, however, since we are treating it as 3 x 10 = 30. We multiply 38 x 3.
Problems 1 through 5: Find the roots (values of x when the expression is equal to zero) using factoring. Prove your answers are correct by checking, or showing that the values of x you computed satisfy the original equation.
was 40, and C was 41, but I needed to get 80 but when you add B+C when A is forty then it's wrong. So
The thirty data sets were plotted into a scatterplot and a linear regression analysis was used to show the
Section “Cost behaviour analysis” – The graph of variable costs that behave in a curvilinear fashion will approximate a straight line within the relevant range.