Hello,
7x-4y=-8 (1)
y=3/4x-3==>3x-4y=12 (2)
(1)-(2)==>4x=-20 ==>x=-5
if x=-5 then (1)==>4y=-35+8==>y=-6.75
Answer B
Answer:
x=8 & y=-9
Step-by-step explanation:
the horizontal line passing through any point (m,n) is y = n
and vertical line is x = m
so the answer is
x=8(vertical)
y= -9(horizontal)
Answer:
The conclusion is that the average level of decibel at the library has changed since the installation of a new computer plug
Step-by-step explanation:
From the question we are told that
The population mean is
The sample size is
The sample mean is
The sample standard deviation is
The level of significance is
The Null Hypothesis is
The Alternative Hypothesis is
The test statistics is mathematically evaluated as
substituting values
The negative sign show that this is a left-tail test
Now the critical value of the level of significance obtained from the critical values table is
Now comparing the critical value of the and the test statistics we see that critical value is greater than the test statistic which implies that the null hypothesis is rejected.
The conclusion is that the average level of decibel at the library has changed since the installation of a new computer plug
You will need to make the fractions have a common denominator in order to add or subtract. So 1/6 and 3/5 share a common denominator of 30, making 1/6 into 5/30 and 3/5 into 24/30. So 5/30 plus 24/30 equals 29/30. So, 30/30 (the whole) minus 29/30 equals 1/30, which is the amount of time spent on Sunday.