1. A national achievement test is administered annually to 3rd graders. The test has a mean score of 100 and a standard deviation of 15. If Jane's z-score is 1.20, what was her score on the test? 2. Who has a better relative position: Tina's got a score of 75 on a statistics test with a mean of 60 and a standard deviation of 10 or Paula's got a score of 36 on accounting test with a mean of 30 and a variance of 16? 3. 23. A teacher gives a 20-point test to 10 students. The scores are shown here. Find the percentile rank of a score of 17. 18, 17, 12, 6, 8, 2, 3, 11, 21

Q: 6. In an ice cream shop, each ice cream cone (c) costs $3 and each bowl of ice cream (b) costs $5.…

A: According to the question,  In an ice cream shop, each ice cream cone (c) costs $3 and each bowl of…

Q: Solve the system

A: Step 1: First, in order to solve a mathematical problems, we need to identify first its field. Step…

Q: What do the following two equations represent? 4�+2�=104x+2y=104, x, plus, 2, y, equals, 10…

A:

Q: 2 y ==x+2 3 Solve the system. 2x-3y =-6

A:

Q: 3. Extend: Can you solve a problem with 3 variables and 3 equations?! Alex, Betty, and Cara, went to…

A: The total money spent by each person is $5. Alex bought 2 chocolate bars, 2 sour key, and 4…

Q: Is (-6, 4) a solution to this system of equations? y = -3x - 14 y = x + 10

A: y = -3x - 14 and y = x + 10 Is ( - 6 , 4) is a solution of the system of equation.

Q: 2. Solve each system of equations by graphing. 7. y=-x+4 y=-x-9 6- 10

A: Solve by graph calculate intercept

Q: The product of a number and five is less than or equal to the number minus four. find the solution…

A: GIVEN The product of a number and five is less than or equal to the number minus four

Q: | 12. Solve the system of equations below: 4x + 2y = 22 -2r + 2y = -8

A:

Q: 4x + 8y + z = 2 + 7y=3z - 14 2x = 3y +3-2z No decimals. X= Y

A:

Q: Use any method to solve the system  4x-2y=8 -6x+3y=4

A: The given equations are, 4x-2y=8                ...(i)   We can modify equation (i) as, 2 ×(2x-y =…

Q: Four times a number added to 3 times a larger number is 31. Seven subtracted from the larger number…

A: x = smaller number y = larger number

Q: Solve and graph the following system of equations 6x - 5 25x + 23

A: Given that the system of equation, 6x-5<4x+1515x-7>25x+23

Q: tem using any algebraic method. –5x + y = -3 15x – 3y = 9

A: Given,           The system of equations are               -5x+y=-3                15x-3y=9

Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.