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34kurt
4 years ago
11

(2x² - 40x² – 28) /(x² – 5x – 2)

Mathematics
1 answer:
erastova [34]4 years ago
4 0

Answer:

x = i sqrt(14/19) or x = -i sqrt(14/19)

Step-by-step explanation:

Solve for x:

(-38 x^2 - 28)/(x^2 - 5 x - 2) = 0

Multiply both sides by x^2 - 5 x - 2:

-38 x^2 - 28 = 0

Add 28 to both sides:

-38 x^2 = 28

Divide both sides by -38:

x^2 = -14/19

Take the square root of both sides:

Answer: x = i sqrt(14/19) or x = -i sqrt(14/19)

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Determine whether the lines are parallel, intersect, or coincide. y-7x=6, y+7x=8
NikAS [45]

The slope for the first problem given is -7

The slope for the second problem is 7

As these are the same slope and not opposite reciprocals, <u>the lines are neither parallel or perpendicular</u>.

This means that the lines will cross at a point at some point in the graph, meaning that your answer would be that the lines intersect.

3 0
3 years ago
Brainly i need help on this question pls look at the image k12
lara31 [8.8K]
<h3>Answers:</h3>

1% of 300 is <u>    3     </u>

So 64% of 300 is <u>     192    </u>

========================================

Further explanation:

To take 1% of 300, we just chop off the extra zeros. So that's how I got 3.

To go from 1% to 64%, that's a jump of "times 64". Meaning you multiply that '3' by 64 to get 64*3 = 192.

Notice that 192/300 = 0.64 = 64% to confirm the answer.

5 0
2 years ago
Which group of three squares will form a right triangle when<br> joined at their vertices?
Ilia_Sergeevich [38]

Answer:

Option ?) 17 cm, 15 cm, 8 cm

<em>The assignment should have </em><em>four options</em><em> to choose from, but there is only a picture of two. </em>

Step-by-step explanation:

<em>None of the squares </em><em>shown</em><em> form a right triangle. To determine if sides form a right triangle, you use </em><em>this</em><em> formula:</em>

a²+b²=c²

<em>We are given two options in the picture.</em>

Option A) 18, 10, and 8.

Option B) 12, 9, and 6.

<em>So, now we need to apply the formula:</em>

Option A)

║8² + 10² = 18²

  ↓

║64 + 100 = 324

  ↓

║FALSE

Option B)

║6² + 9² = 12²

  ↓

║36 + 81 = 144

  ↓

║FALSE

<em>Both of these options are false.</em><em> But, I decided to look up this assignment to check my answer. It turns out, there are </em><em>4 options</em><em>, and you only had a picture of two. So, what's the answer?</em>

<em />

<em>There is an answer choice that shows 3 squares with the lengths of 17 cm, 15 cm, and 8 cm. </em><em>This is the correct answer</em><em>.</em>

<em />

<em>For proof, let's apply the formula:</em>

Option ?)

║8² + 15² = 17²

  ↓

║64 + 225 = 289

  ↓

║TRUE

<em>[Since the option isn't shown, I'll put a '?' so there is no confusion]</em>

8 0
3 years ago
Six less than the quotient of a number and 2 is equal to 3
Likurg_2 [28]
Let the number we are looking for be x we have that:
x/2 - 6 = 3
We can rearrange to find x:
x/2 = 9
x = 18

The number is 18
6 0
3 years ago
Lan scores 44out of 60 maths test.what is his score as a percentage to 1 decimal place
ikadub [295]

Answer:

73.3%

Step-by-step explanation:

We can express 44 out of 60 as 44/60. Since the fraction viniculum means division, this reaches 44 divided by 60.

In doing so, we achieve the answer 73.33333.... terminating.

Rounding to the nearest place gives 73.3 as our answer.

8 0
3 years ago
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