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olga_2 [115]
3 years ago
8

Anyone can u please help me.

Mathematics
1 answer:
Lina20 [59]3 years ago
5 0

Answer: i cant see the pic i would help but i cant see picture

Step-by-step explanation:

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It is known that x1 and x2 are roots of the equation x2−8x+k=0, where 3x1+4x2=29. find k.
zysi [14]

Answer:

k = 15

Step-by-step explanation:

∵ x² - 8x + k = 0 ⇒ has two roots x1 and x2

∵ ax² + bx + c = 0 has two roots

∴ The sum of roots = -b/a and the product of them = c/a

∵ a = 1 , b = -8 and c = k

∴ x1 + x2 = -(-8)/1 = 8

∴ x1 + x2 = 8 ⇒ (1)

∵ 3x1 + 4x2 = 29 ⇒ (2)

Multiply (1) by -4

∴ -4x1 - 4x2 = -32 ⇒ (3)

Add (2) and (3)

∴ -x1 = -3

∴ x1 = 3

By substituting value of x1 in (1)

∴ 3 + x2 = 8

∴ x2 = 5

∴ The roots are 3 and 5

∴ c/a = 3 × 5 = 15 ⇒ (a = 1)

∴ c = 15

∴ k = 15

4 0
3 years ago
There are 100 books on the shelves.On the table there are 15 stacks of books with 10 books in each stack. What 3 -digit number t
makkiz [27]
250 books in total. 15 times 10, plus the 100 on the shelves. 
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4 years ago
Three out of four students in your class have brought in permission slips foe nest week field trip. there are 32 students in the
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You calculate it as follows:

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4 years ago
Malaya is making a collage of her birthday party photos and she wants to add an 8 x 10 inch. photo. Since there is not enough sp
sergij07 [2.7K]

Answer:

The answer is C. 6.4 X 8 in

Step-by-step explanation:

If the scale factor from the original to the trimmed photo is 5:4

The statement above just means the scale of the old dimension is 5 while the scale of the new dimension is 4.

To get the new dimensions, multiply each of the old dimensions by 4/5

4/5 X 10 = 8

4/5 X 8 = 6.4

Therefore the new dimension is 6.4 X 8 in

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4 years ago
Help, just tell me the answer pls I need it by 9:00 am
xxTIMURxx [149]

Answer:

A

Step-by-step explanation:

SO sorry if wrong but it makes sense to me. if right ur welcome. Brainliest pls. jk i don't ask for that, that is up to you all to choose.

7 0
2 years ago
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