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3 years ago

What is the solution to {4x - y = 8 {6x + y = 2

1 answer:

7 0

$4x - y = 8 \\ + 6x + y = 2 \\ = = = = = = = = \\ 10x = 10 \\ 10 \div 10 = 1 \\ x = 1 \\ \\ \\ 6x + y = 2 \\ 6(1) + y = 2 \\ 6 + y = 2 \\y = 2 - 6 \\ y = - 4 \\ \\ \\ \\ check \\ \\ 6x + y = 2 \\ 6(1) + y( - 4) = 2 \\ 6 - 4 = 2 \\ 2 = 2$

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Black_prince [1.1K]

Answer:
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10 • 2 = 20

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3 years ago

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3 years ago

Read 2 more answers

#23-6: The pool concession stand made $5,800 in June and $6,300 in July. What is the percent of increase in sales? Round the ans

katrin [286]

Answer:

8.6%

Step-by-step explanation:

To find the percent change, you will need to compute the positive difference and then divide the difference by the original (the older amount).

So the positive difference will be obtain by doing larger minus smaller:

6300

- 5800

-----------

500

The older amount was 5800.

So 500/5800 is the answer as a un-reduced fraction.

I'm going to reduce it by dividing top and bottom by 100:

500/5800 = 5/58

5/58 is the answer as a reduced fraction.

5 divided by 58 gives=0.086206897 in the calculator .

Approximately 0.0862 is the answer as a decimal.

To convert this to a percentage, multiply it by a 100:

8.62%

Rounded to the nearest tenths is 8.6%

-------------

So 5800+5800(.0862) should be pretty close to 6300 (not exactly though since we rounded).

5800+5800(.0862)=6299.96 using the calculator.

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3 years ago

Difference between dot and cross product

Rashid [163]

If you have two vectors A and B,
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The cross product is a vector perpendicular to both A and B. It deals with how much of one vector is perpendicular to the other vector. You can see that in the sine part of this form -
$A ~x ~B= [A][B]sin(\theta)$

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4 years ago

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Harman [31]

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3 years ago