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sp2606 [1]
3 years ago
9

Solve the system of linear equations below. X+y=4 2x+3y=0

Mathematics
2 answers:
deff fn [24]3 years ago
7 0
X + y = 4...x = 4 - y

2x + 3y = 0
2(4-y) + 3y = 0
8 - 2y + 3y = 0
-2y + 3y = 0 - 8
y = -8

x + y = 4
x - 8 = 4
x = 4 + 8
x = 12

solution is : (12,-8)
mojhsa [17]3 years ago
4 0

Answer: x=12 and y=-8

Step-by-step explanation:

The given system of linear equations: x+y=4..............(1)\\2x+3y=0...............(2)

Multiply 2 on both sides in equation (1), we get

2x+2y=8.......................(3)

Using elimination method, eliminate equation (3) from (2), we get

y=-8

When we substitute the value of y in equation (1), we get

x-8=4\\\\\Rightarrow\ x=8+4=12

Hence, the solution of the given system is x=12 and y=-8.

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Answer:

B. How many total customers were at the story today?

Step-by-step explanation:

Option 'B' is not a statistical question because there is not more than one answer.

There is only one answer to this question.

Option 'A,' 'C,' and 'D' are statistical questions because there is more than one answer.

<em>What amounts did each person at the store spend on their purchase?</em>

This question has more than one answer.

<em>How long did each customer spend shopping at the store?</em>

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These questions have more than one answer as well.

Statistical questions are questions that have more than one answer. This means you can collect data.

I, therefore, believe that option 'B' is not a statistical question.

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A piece of fabric is 1/3 yard by 3 5/8 yards.
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3 years ago
A student rolls a number cube whose six faces are numbered 1 through 6.
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Answer:

B

Step-by-step explanation:

The <u>sample space</u> for this experiment is the set of all possible outcomes.

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8 0
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3 over 4 open parentheses 1 half x space minus space 12 close parentheses space plus space 4 over 5
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For this case we have the following expression:

\frac {3} {4} (\frac {1} {2} x-12) + \frac {4} {5}

Rewriting the expression we have:

We apply distributive property to the terms of parentheses:

\frac {3} {8} x- \frac {36} {4} + \frac {4} {5}\\\frac {3} {8} x-9 + \frac {4} {5}\\\frac {3} {8} x- \frac {41} {5}\\

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\frac {3} {8} x- \frac {41} {5}

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