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tino4ka555 [31]
3 years ago
5

(09.02)

Mathematics
1 answer:
Yuki888 [10]3 years ago
4 0

Answer:

x = - 2, x = 10

Step-by-step explanation:

Given

x² - 8x - 20 = 0

Consider the factors of the constant term (- 20) which sum to give the coefficient of the x- term (- 8)

The factors are - 10 and + 2 , since

- 10 × 2 = - 20 and - 10 + 2 = - 8 , then

(x - 10)(x + 2) = 0

Equate each factor to zero and soilve for x

x + 2 = 0 ⇒ x = - 2

x - 10 = 0 ⇒ x = 10

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According to Greg, the perfect cherry pies have a ratio of 240 cherries to 3 pies. How many cherries does Greg need to make 9 pe
harkovskaia [24]

Answer:

720 cherries

Step-by-step explanation:

3 pies need 240 cherries so the equation would be:

3c = 240

so, <u>c = 80</u>

But, he needs to make 9 "perfect" pies so you make the equation:

9c = 80*9

9c = 720

So Greg needs 720 cherries to make 9 perfect cherry pies.

6 0
3 years ago
Veronikas five test scores are 59 80 95 and 93 if the outlier of 59 is removed what is the mean absolute deviation of the remain
Anit [1.1K]

Complete Question

Veronikas four test scores are 59, 80, 95, 88 and 93 if the outlier of 59 is removed what is the mean absolute deviation of the remaining four test scores?

Answer:

5

Step-by-step explanation:

We have the four test scores

80, 95, 88 and 93

Step 1

We find the mean of the 4 test scores

= 80 + 95 + 88 + 93/4

= 356 / 4

89

Step 2

The formula for Mean Absolute Deviation =

Summation( x - Mean)/n

Hence,

|(80 - 89 )+( 95 - 89) + (88 - 89) + (93 - 89)|/5

= 9 + 6 +1 + 4/4

= 20/4

= 5

8 0
3 years ago
I only need a little bit of help. PLS HELP
svetlana [45]

Answer:

Step-by-step explanation:

15. (x + 6)(x + 1)

16. (m - 19)(m + 2)

17. (y - 8)(y - 2)

18. (p + 12)(p - 3)

19. (c - 15)(c + 3)

20. (w - 8)^2

21. (a + 15)(a - 2)

22. (x - 30)(x + 3)

23. 3(5r + 4)(5r - 4)

24. 5(3x - 1)(3x + 1)

25. m^2n(1 - n)(1 + n)

26. 6a(a - 2b)(a + 2b)

27. 3(x^2 + 5x - 24)

      3(x + 8)(x - 3)

28. 2(m - 1)^2

29. x(x^2 + 9x - 52)

       x(x+13)(x-4)

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8 0
3 years ago
What is the value of 5(7) + 4(-3)
andrew11 [14]
Your answer would be 23
3 0
4 years ago
Read 2 more answers
What is the sum of the first five terms of a geometric series with a1 = 20 and r = 1/4?
SVETLANKA909090 [29]
For the answer to the question above,
The first term is 20 
<span>The second term is 20* 1/4 = 5 </span>
<span>The third term is 5 * 1/4 = 5/4 </span>
<span>The 4th term is 5/4 * 1/4 = 5/16 </span>
<span>The 5th term is 5/16 * 1/4 = 5/64 </span>

<span>Sum is therefore 20 + 5 + 5/4 + 5/16 + 5/64 </span>
To complete my answer,
<span>= (1280 + 320 + 80 + 20 + 5) / 64 </span>
<span>= 1705/64
</span>
I hope my answer helped you. Have a nice day!
7 0
4 years ago
Read 2 more answers
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