Answer:
substituting x=5y into 2x-3y=7, Answer: y = 1 x = 5
Step-by-step explanation:
2(5y)-3y=7
10y-3y=7
7y=7
y=1
substitute y=1 into x=5y
x=5(1)
x=5
Answer:
Earned = 160 + 20d
Step-by-step explanation:
Seeing as Elmo works 20 hours per week at each job, that means he worked 20 hours at the $8 job and 20 hours at the $d job.
First find how much he earned from his $8/hr job.
(20)8 = 160
Elmo earned $160 at this $8/hr job.
Next, we know he earns $d/hr at his other job, and he works 20 hours at that job as well.
(20)d = 20d
Add the earnings from both jobs together.
160 + 20d = total earnings
9514 1404 393
Answer:
any solution of y = 3x -4
Step-by-step explanation:
The two equations describe the same line. There are an infinite number of solutions. Any values of x and y that satisfy either equation will satisfy both equations.
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The graph shows the lines in different colors and textures, so you can see they are the same line.
The shape of the distribution, is symmetric, is the best description of statistics about scores.
<h3 /><h3>What is standard deviation ?</h3>
The standard deviation is the positive square root of the variance of this data set. Variance of a data set is the sum of squared differences of the data values from its mean to the total count of data values.
The given data in the problem is;
Mean = 78%
Standard deviation = 4%
Min = 64
Median = 78
Q1 = 72
Q3 = 84
Max = 99
The condition for the symmetric distribution is found as;

From the data we have;

So that ,
.
Hence, the condition of symmetry is followed.
To learn more about the symmetry, refer to the link;l
brainly.com/question/15970176
#SPJ2
Answer:
This is the answer of your question. ☺☺
Step-by-step explanation:
40 -2*7
40 -14
26