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9966 [12]
4 years ago
14

2 Points

Mathematics
1 answer:
Crazy boy [7]4 years ago
7 0
The correct answer is d
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Find the estimates of x^2-x-2=3
Julli [10]

Answer:

x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79

Step-by-step explanation:

Given

Quadratic equation is

x^2-x-2=3\\x^2-x-5=0

Roots of the quadratic equation ax^2+bx+c=0 are

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\

So, for the given equation roots are

x=\frac{1\pm\sqrt{(-1)^2-4(1)(-5)}}{2\cdot 1}\\x=\frac{1\pm\sqrt{21}}{2}\\so, x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79

5 0
3 years ago
a bag contains a-r-I-t-h-m-e-t-I-c. Amelia chooses a tile without looking and doesn’t replace it. She chooses a second tile with
olga nikolaevna [1]
<span>The first time she chooses, her chances are 2/10 that she will get an I tile. With not replacing the tile, her second chance will be 1/9. Multiply the two fractions together gives 2/90 = 1/45
(^>^)</span>
5 0
3 years ago
Read 2 more answers
Please solve<br>I really need help​
Llana [10]

9514 1404 393

Answer:

  x = 12

Step-by-step explanation:

The similarity statement tells you corresponding sides have the same ratio.

  AB/BC = FE/EC

  x/10 = 6/5

  x = 10(6/5)

  x = 12

7 0
3 years ago
Highest common factor of 24 and 18
Alenkasestr [34]
6 is the highest common factor
8 0
4 years ago
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Which of the following is in Integrity but not a whole number A -9.6 B -4 ​
abruzzese [7]

Answer:

B. -4.

Step-by-step explanation:

3 0
3 years ago
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