Answer:
Step-by-step explanation:
26.6/53.2 = 0.5 = 50%
26.6 is 50% of 53.2
The correct system of equations for this is:
x - y = 6
3x + 4y = 4
The easiest way to find answer in a multiple choice problem like this is by looking at the answer to the system of equations. The solution set to a system is always where the two lines cross. Here, we see that cross at the point (4, -2). This means that if we put 4 in for x and - 2 in for y, it will make both equations true. The only example of both being true is the set of equations listed above. Below is the work for what happens when we put those values in.
First Equation
x - y = 6
(4) - (-2) = 6
4 + 2 = 6
6 = 6 (TRUE)
Second Equation
3x + 4y = 4
3(4) + 4(-2) = 4
12 - 8 = 4
4 = 4 (TRUE)
Since both are true in this version and none of the other systems, this must be the system graphed above.
If x is zero then you must replace x with zero and use the rules of PEMDAS (Parentheses, Exponent, Multiplication, Division, Addition, Subtraction) to solve
7 + (-4(0)^2)
7 + (-4(0))
7 + 0
7
If x is 0 then the expression equals 7
Hope this helped
~Just a girl in love with Shawn Mendes
The answer is -12
because you just have to simplyfy it and plug in the values
Answer:
The answer is false
Step-by-step explanation:
In a sample above 30 obs like this the confidence interval is defined as
X+- t* (s/sqrt(n)) where X is the mean t the tvalue for a given confidence level, n the size of sample and s standar deviation.
To find de appropiate value of t we must see the T table where rows are degrees of freedom and columns significance level
The significance is obtained:
significance = 1 - confidence level = 1 - 0.9 = 0.10
Degrees of freedom (df) for the inteval are
df = n - 1 = 18 - 1 = 17
So we must look for the value of a t with 17 values and significance of 0.10 which in t table is 1.740 not 1.746 ( thats the t for 16 df)