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antoniya [11.8K]
3 years ago
11

Use the square root method to find the solutions to the quadratic equation 22

Mathematics
1 answer:
lakkis [162]3 years ago
5 0

Answer:

x = 2\sqrt{2}, -2\sqrt{2}

Step-by-step explanation:

Given

x^2 - 8 = 0

Required

Solve

We have:

x^2 - 8 = 0

Add 8 to both sides

x^2 = 8

Take square roots of both sides

x = \±\sqrt{8}

Expand

x = \±\sqrt{4*2}

This gives:

x = \±2\sqrt{2}

Split

x = 2\sqrt{2}, -2\sqrt{2}

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2x+8y=34 <br><br> 10y+2x=40 solve for y and x
KiRa [710]

Answer:

Step-by-step explanation:

6 0
3 years ago
Please help me...I don't get it-
DaniilM [7]

Answer:

1. It would be the second block. Bill reads 3 books EACH week. I know you’re looking for that X to be 1 but if you look 3 books x 5 weeks = 15 books and so on.

2. It would be the first block. Exactly on 6 weeks he reads 6 books meaning that by week 3 (which is half) he would have read haof the books (2). And same for week 12 you and another 4 which gets you 8 books.

3. It’s the last block. On week 12 he read 4 books. Half of 12 is 6 so it would be half books and week 3 is half of that which is 1 book per 3 weeks.

4. Is the third block. (Process of elimination lol) but also easily you can find the rate of each week by dividing the 15 books by 10 weeks which gets you 1.5 books read per week

5 0
2 years ago
Read 2 more answers
Factor the expression using the GCF 12 + 20
Rus_ich [418]

Answer:

3 + 5

Step-by-step explanation:

GCF = 4

12 / 4 = 3

20 / 4 = 5

3 + 5 = 8

6 0
3 years ago
Find the area of the trapezoid. points are (-5,-3)(4,-3)(6,-7)(-7,-7)​
Olegator [25]

Answer:

44 square units

Step-by-step explanation:

The area of a trapezoid with bases b₁ and b₂ and height h is given by the formula

A=\left(\dfrac{b_1+b_2}{2}\right)h

If you're wondering how we get this formula, check the attached illustration (remember the area of a parallelogram is its base multiplied by its height)! Moving on to our trapezoid, the pairs of points (-5,-3)(4,-3) and (6,-7)(-7,-7) form two horizontal segments, which form b₁ and b₂, and our height is the distance between the y-coordinates -3 and -7, which is 4. We can find b₁ and b₂ by finding the distance between the x coordinates in their pairs of points:

b_1=|-5-4|=|-9|=9\\b_2=|6-(-7)|=|6+7|=13

Putting it altogether:

A=\left(\dfrac{9+13}{2}\right)(4)=\left(\dfrac{22}{2}\right)(4)=(11)(4)=44

So the area of our trapezoid is 44.

4 0
3 years ago
Russell wants to purchase a computer that costs $1575. With a larger monitor, the cost of the computer will go up 8%. How much w
lesya [120]

First, we need to find 8% of 1,575. To do so we have to divide 8 by 100, then multiply the quotient by 1,575.

8% ⇒ 0.08

1,575 × 0.08 = 126

Now add the 8% increase to the original cost.

1,575 + 126 = 1,701

<h2>Answer:</h2>

<u>Option 1: </u><u>$1,701</u><u>.</u>

I hope this helps :)

8 0
3 years ago
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