$1.30. You can take the two statements and make them into equations. First set X equal to the number of dimes and Y equal to the number of quarters. Next set up your equations. the first .1X times .25Y=4.55 and X=Y. Next use substitution to solve for X, and you get 13. Next multiply 13 times .1 to get 1.3 which is in dollars.
Sample size = 65
mean = 180
variance = 135
Standard Deviation is square root of the variance. So standard deviation = 11.6
Standard Error of the mean = Standard Deviation / square root of sample size
= 11.6 / 8.06 = 1.44
Answer:
140
Step-by-step explanation:
Solve 40% of 350.
Yas! systems of equations
convert one equation so that a single variable is one one side
x = 65 - 2y
plug it in the other equation
2(65 - 2y) + 3y = 105
130 - 4y + 3y = 105
130 - y = 105
25 = y