Mathematics, 20.07.2019 17:00 bponce06
Question 1 carly and janiya put some money into their money boxes every week. the amounts of money (y), in dollars, in their money boxes after certain amounts of time (x), in weeks, are shown by the equations below: carly y = 60x + 40 janiya y = 50x + 80 after how many weeks will carly and janiya have the same amount of money in their money boxes and what will that amount be? 5 weeks, $280 5 weeks, $340 4 weeks, $280 4 weeks, $340 question 2 a system of equations is shown below: y = 8x β 2 y = 9x β 7 what is the solution to the system of equations? (β5, 38) (β5, β38) (5, 38) (5, β38) question 3 two equations are given below: m + 3n = 10 m = n β 2 what is the solution to the set of equations in the form (m, n)? (1, 3) (2, 4) (0, 2) (4, 6) question 4 the work of a student to solve a set of equations is shown: equation 1: m = 8 + 2n equation 2: 3m = 4 + 4n step 1: β3(m) = β3(8 + 2n) [equation 1 is multiplied by β3.] 3m = 4 + 4n [equation 2] step 2: β3m = β24 β 6n [equation 1 in step 1 is simplified.] 3m = 4 + 4n [equation 2] step 3: β3m + 3m = β24 β 6n + 4n [equations in step 2 are added.] step 4: 0 = β24 β 2n step 5: n = β12 in which step did the student first make an error? step 4 step 3 step 2 step 1 question 5 a student is trying to solve the system of two equations given below: equation p: y + z = 6 equation q: 8y + 7z = 1 which of the following is a possible step used in eliminating the y-term? (y + z = 6) β β8 (y + z = 6) β 7 (8y + 7z = 1) β 7 (8y + 7z = 1) β 8 question 6 line a is represented by the equation given below: x + y = 4 what is most likely the equation for line b, so that the set of equations has infinitely many solutions? 4x + 4y = 4 4x + y = 4 2x + 2y = 8 x + y = 8
Answers: 1
Mathematics, 21.06.2019 18:00
Solve 2^x=32 and rewrite this equation in a logarithmic form
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Mathematics, 21.06.2019 18:20
The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%
Answers: 1
Question 1 carly and janiya put some money into their money boxes every week. the amounts of money (...
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