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vodka [1.7K]
3 years ago
12

Help meeee please in quadratic equation

Mathematics
2 answers:
Leona [35]3 years ago
8 0
7x² + 31x + 12 = 0

x = -b ± √(b² - 4ac)
               2a
x = -(31) ± √((31)² - 4(7)(12))
                      2(7)
x = -31 ± √(961 - 4(84))
                   14
x = -31 ± √(961 - 336)
                  14
x = -31 ± √(625)
              14
x = -31 ± 25
           14
x = -31 + 25    or    x = -31 - 25
           14                          14
x = -6    or    x = -56
      14                 14
x = ⁻³/₇    or    x = -4
Natasha2012 [34]3 years ago
3 0
What part are you wanting to know about? The written of number 9? 
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Which properties were used to solve the following problem?
Stels [109]

Step-by-step explanation:

25(2x) + 25(3y)

25 · (2 · x) + 25 · (3 · y)

(25 · 2) · x + (25 · 3) · y                <em>Associative property </em><em>(a · b) · c = a · (b · c)</em>

(25 · 2)x + (25 · 3)y

(2 · 25)x + (3 · 25)y             <em>Commutative property</em><em> a · b = b · a</em>

<em>50x + 75y</em>

5 0
3 years ago
Write the ratio 48:30:42 in its simplest form​
Zielflug [23.3K]
Answer- 8:5:7

Explanation:
Find the greatest common factor for all of them. Which is 6.
Then you just divide each number by 6
48/6= 8
30/6= 5
42/6= 7
Making it 8:5:7
7 0
3 years ago
Find the diameter and circumference of a circle with the radius of 13.1 km.
Alexandra [31]
R = 13.1
so
<span>diameter  = 13.1 x 2 = 26.2 km
</span>circumference = 2 pi r = 26.2 pi km
or
circumference = 26.2 x 3.14 = 82.27 km
4 0
3 years ago
A square has an area of 49 square inches. Explain how to find the perimeter of the square.
dexar [7]
It is a square, so you know the sides are equal. You also know that 49 is a squared number. so you do 49 square rooted and you get 7. the perimeter is adding all the side lengths. So you take 7 and multiply it by 4 since a square has 4 sides. and u have your perimeter. 28!<span />
3 0
4 years ago
HELP WILL MARK BRAINLIEST! I NEED IT ASAP
vlada-n [284]

Answer:

ji

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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