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inn [45]
3 years ago
12

Solve the system of linear equations.

Mathematics
1 answer:
irina [24]3 years ago
5 0

Answer:

(3,6)

Step-by-step explanation:

-(6x+2y=30)

x+2y=15

-6x-2y=-30

x +2y=15

-5x=-15

x=3

3+2y=15

2y=12

y=6

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Answer:

The correct answer is the last one.

Step-by-step explanation:

Variable data is any kind of information gathered that can be made into a chart or graph representing what was collected. In other words, the data collected must vary.

The first, second, and third answers cannot be made into a chart/graph as it would be a singular number, and not provide varying data (which is required to produce a graph/chart).

The last answer would be correct as one can create a chart as the data collected from that question would vary. For example, five family members could be born in July, six in August, and ten in October. The variable that is "varying" would be these months.

Hope this helps!

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3 years ago
AABC ~ AQRS
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Yuri purchased 8 trees to have planted at his house. The store charged a delivery fee of $5 per tree.
cestrela7 [59]

Answer:

$16.

Step-by-step explanation:

Let t represent the cost of each tree.

We have been given that Yuri purchased 8 trees to have planted at his house. So the cost of 8 trees will be 8t.

We are also told that the store charged a delivery fee of $5 per tree. So the delivery charges of 8 trees will be 8\times \$5=\$40

The total cost of purchasing 8 trees will be 8t+40.  

Since the total cost of the trees including the delivery was $168, so we can get an equation as:

8t+40=168

8t+40-40=168-40

8t=128

Upon dividing both sides of our given equation by 8, we will get:

\frac{8t}{8}=\frac{128}{8}  

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Therefore, the cost of each tree is $16.

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Given that line i is perpendicular to plane B, line i is the only line perpendicular to plane B through point V.
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Step-by-step explanation:

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