Answer: 1091
Step-by-step explanation: add the numbers
<span>Amanda has 26 nickels and dimes.
We shall call nickels x and dimes y.
We can write the following equations:
x = 3y -2 or -x +3y = 2
x + y = 26
We can cancel out the x to give 4y = 28 or y = 7
If there are 26 coins in total and 7 of them are dimes then there must be 19 nickels.
The number of nickels (19) is two fewer than three times the number of dimes ( 3(7) - 2 = 19).</span>
Answer:
d
Step-by-step explanation:
63+20=83
90-83= 7
answer: 7 degrees
Answer:
estimated proportion of unemployed
Step-by-step explanation:
Information given
n=1500 represent the random sample taken
X=92 represent the number of people unemployed
estimated proportion of unemployed
is the value to value to test
z would represent the statistic
represent the p value
System of hypothesis
We want to test if the true proportion is lower than 0.05 or no and the system of hypothesis are::
Null hypothesis:
Alternative hypothesis:
The statistic is given by:
(1)
Replacing the info given we got:
Ok i know this is hard but once you get it you will be fine. -2 is the y value in the order of pair (0,-2). So in the equation y=5x-b plug -2 into y (so that would be -2=5x-b). Then 0 is the x value in the order of pairs so plug 0 into x. ( So -2=5×0-b. start by combining terms, so multiply 5 and 0 such is p. So you are left with -2=-b. I am not completly sure but I don't think you y value can be negative so just flip all the signs and you are left with 2=b!