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Iteru [2.4K]
3 years ago
7

Write the quadratic equation in standard form.

Mathematics
1 answer:
GaryK [48]3 years ago
8 0

Answer:

x² - x - 2 = 0

Step-by-step explanation:

Given:

- 4(x - x²) = 8

Find:

Standards form

Computation:

- 4(x - x²) = 8

(x - x²) = -2

x - x² = -2

x² - x - 2 = 0

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Valentin [98]

Answer:

x is 122

Step-by-step explanation:

7 0
3 years ago
Two square rooms have a total floor area of 89m2. One room is 3m longer each way than the other. Find the dimensions of the two
Rudiy27

Answer:

A

Step-by-step explanation:

Let the smaller room have an area of x^2

Let the larger room have an area of (x + 3)^2

(x+3) ^2 + x^2 = 89               Be careful not to make it 89^2.

x^2 + 6x + 9 + x^2 = 89        Expand the binomial squared

2x^2 + 6x + 9 - 89 = 0          Subtract 89 from both sides

2x^2 + 6x + 9 - 89 = 0          Combine

2x^2 + 6x - 90=0                  Divide by 2

x^2 + 3x - 45 = 0         This factors.

(x + 9)(x- 5) = 0

X + 9 gives nothing useful

x - 5 = 0

x = 5

x + 3 = 5+3 = 8

So the answer is A

3 0
3 years ago
100 POINTS PLEASE PLEASE HELP WITH CORRECT ANSWER
lesantik [10]

Answer:

-3:4

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Two ships have a harbor entrance at the same time. The first ship is traveling at a constant 16 mph, while the second is traveli
stepan [7]
So hmm check the picture below

both ships leave at the same time, one is going 16mph, the other 20mph, 2hrs later on the road

at 16mph well, 2hrs is just 16+16, or 32 miles away
20mph for 2hrs, is 20+20, or 40 miles away

using the law of cosines  \bf x = \sqrt{{{ 32}}^2+{{ 40}}^2-2(32)(40)cos(169^o)}

again, recall, the angle is in degrees, so, when taking the cosine, make sure your calculator is in Degree mode

5 0
3 years ago
What is 2÷413= what and a stratagy
deff fn [24]

0.0048426150121065 is the answer for that

its pure division


6 0
3 years ago
Read 2 more answers
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