Answer:
<em>(-8,4)</em>
Step-by-step explanation:
<u>System of Equations:</u>
Solve the following system of equations by the substitution method:
5x - 6y = -64 [1]
y = 20 + 2x [2]
Substituting y from [2] in [1]:
5x - 6(20 + 2x) = -64
Operating:
5x - 120 - 12x = -64
Simplifying:
-7x - 120 = -64
Adding 120:
-7x = -64 + 120 = 56
x = 56/(-7) = -8
x = -8
From [2]:
y = 20 + 2(-8) = 4
Solution (-8,4)
Answer:
x = 26
Step-by-step explanation:
There are two numbers and average is the sum of a certain amount of numbers divided by the same amount.
21 × 2 = 42
42 - 16 = 26
x = 26
Calculate the 1st quartile of the data set below: 53, 54, 71, 95, 108, 110, 115, 120, 128, 128, 129, 141, 143, 158, 193
garik1379 [7]
<span>The first quartile, is the median of the lower half of the data set. That means we have to find the median. If you write these numbers down on a piece of paper and x them out you can easily find the median! The median is 120. Hope this helps! <3</span>
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Answer:
the correct answer is 21.07070206.
