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chubhunter [2.5K]
3 years ago
14

Need help on 1-3. This is algebra II.

Mathematics
1 answer:
Anastaziya [24]3 years ago
8 0
Oh bro big rip I need help on math too it’s not a fun class
You might be interested in
(2x+3)²=5.find the roots of the equation ​
bija089 [108]

Answer:

-2.61803398875, -0.38196601125

or

(-3±√5)/2

Step-by-step explanation:

First, expand. (2x+3)² = 4x²+12x+9=5

4x²+12x+4 = 0

Quadratic equations take the form ax²+bx+c = 0

In this case,

a = 4

b = 12

c = 4

You can solve with the equation x=(-b±√b²-4ac)/2a

Plug in:

(-12±√144-64)/8

(-12±√80)/8

(-12±√2^4×5)/8

(-12±4√5)/8

(-3±√5)/2

Final answer x = (-3±√5)/2

If you want decimal form: -2.61803398875, -0.38196601125

4 0
2 years ago
23,697 round to the nearest ten thousand
CaHeK987 [17]
20,000 would be the answer
8 0
3 years ago
5x + (1x+6)= 78<br> BARDZO POTRZEBUJĘ
kifflom [539]

Answer:   x = 12

Step-by-step explanation:  

1. add 5x + 1x which will equal 6x so now your equation is:  6x + 6 = 78

2. subtract 6 from 78 to get 72:  6x = 72

3. divide 72 by 6x to get your answer 12

5 0
3 years ago
Read 2 more answers
Could 10.6\text{ cm}, 5.6\text{ cm},10.6 cm,5.6 cm,10, point, 6, space, c, m, comma, 5, point, 6, space, c, m, comma and 4.0\tex
vladimir1956 [14]

Since we know that triangle inequality theorem states that sum of any two sides of a triangle must be greater than third side.

Now let us see if it is true for our given side lengths.

10.6+5.6>4.0

16.2>4.0

Now let us try with another pair.

5.6+4.0>10.6

9.6

We can see that sum of 5.6 and 4 is less than 10.6. Therefore, 10.6 cm, 5.6 cm and 4.0 cm can not be side lengths of a triangle.

7 0
3 years ago
Read 2 more answers
The sum of two consecutive integers is 211. Find the integers.
Len [333]

Answer:

105 and 106

Step-by-step explanation:

x+(x+1)=211

2x+1=211

2x=210

x=105

7 0
3 years ago
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