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Salsk061 [2.6K]
2 years ago
6

Please answer both questions.

Mathematics
1 answer:
mario62 [17]2 years ago
6 0

Answer:

1) (x-6)^2=49

2) C

Step-by-step explanation:

Subtract 12 x and you get

-x^2-12x+13=0

You will be left with, after making a perfect square

(x-6)^2=49

To get rid of the squared/2nd power, add plus or minus to the opposite side and square root both sides. You will be left with

x-6=plus or minus 7

Your answer comes out to the to problem. Setting both to 0, you get -13, and 1. -6 plus 7 is 1, and -6 plus a -7 is -13.

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) If the pattern shown continues, how many black keys appear on a portable keyboard with 49 white keys? Suggestion: use equivale
andriy [413]

Answer:

35

Step-by-step explanation:

Here we see 5 black keys for every 7 white keys.

So the ratio is 5:7

If we need 49 white keys, find the amount we scale the original ratio by:

    49/7 = 7

So we are scaling by a factor of 7.

The number of black keys would be 5 * the scale of 7. = 35

So there should be 35 black keys.

5 0
3 years ago
Read 2 more answers
(2x−6)+4(x−3) <br> This is for math and I am very confused, please help
Alex Ar [27]

Answer:

6x-18

Step-by-step explanation:

(2x-6)+4(x-3)

you distribute the 4 by multiplying it with the variables within the parenthesis.

(2x-6)+(4x-3)

you can loose the parenthesis and group common factors together.

2x+4x-6-3

add

<u>6x-18</u>

5 0
3 years ago
Read 2 more answers
Check out this rectangular prism
JulijaS [17]

Answer:

52

Step-by-step explanation:

Used hint.

4 0
3 years ago
Please help on this one?
kolezko [41]

Answer: A and B

<u>Step-by-step explanation:</u>

Here is Pascal's Triangle:


Row 1 (x + y)⁰                  1

Row 2 (x + y)¹               1     1

Row 3 (x + y)²             1    2   1

Row 4 (x + y)³           1   3    3   1

Row 5 (x + y)⁴         1   4   6   4   1

        ∵

Row n (x + y)ⁿ⁻¹      1 (sum of 2 digits above) 1


C and D are false.  A and B are the only correct answers

5 0
3 years ago
2 factors of 64 add up to 12 what are they
NikAS [45]

Two factors of 64 that add up to 12 are 8 and 4.

8 x 8 is 64 so its a factor of 64

16 x 4 is 64 so its a factor of 64

8 + 4 = 12

5 0
4 years ago
Read 2 more answers
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