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Rus_ich [418]
3 years ago
7

I have a math problem that is 100/2.54 inches and I don't know how the heck they got 39.37 someone please help

Mathematics
1 answer:
IrinaK [193]3 years ago
3 0

2.54 inches goes into 100 39.37 times

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enelope determined the solutions of the quadratic function by completing the square. f(x) = 4x2 + 8x + 1 –1 = 4x2 + 8x –1 = 4(x2
Marat540 [252]
The correct question is
<span>Penelope determined the solutions of the quadratic function by completing the square.
f(x) = 4x² + 8x + 1
–1 = 4x² + 8x
–1 = 4(x² + 2x)
–1 + 1 = 4(x² + 2x + 1)
0 = 4(x + 2)²
0 = (x + 2)²
0 = x + 2
–2 = x
What error did Penelope make in her work?

we have that
</span>f(x) = 4x² + 8x + 1
to find the solutions of the quadratic function
let
f(x)=0
 4x² + 8x + 1=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

 (4x² + 8x)=-1

Factor the leading coefficient 

 4*(x² + 2x)=-1

Complete the square Remember to balance the equation by adding the same constants to each side.

 4*(x² + 2x+1)=-1+4 --------> ( added 4 to both sides)

Rewrite as perfect squares

4*(x+1)²=3

(x+1)²=3/4--------> (+/-)[x+1]=√3/2

(+)[x+1]=√3/2---> x1=(√3/2)-1----> x1=(√3-2)/2

(-)[x+1]=√3/2----> x2=(-2-√3)/2

therefore

the answer is

<span>Penelope should have added 4 to both sides instead of adding 1.</span>
6 0
4 years ago
Read 2 more answers
Please help thanks!!!
tankabanditka [31]

Answer:

30 or 780 is your answer for the first one. i dont know how to work out the answer for the 2 one im sorry :(

Step-by-step explanation:

13+12+5 = 30

13 x 12 x 5 = 780

I would go for 780

it seems more like to be the answer

5 0
3 years ago
Please help this is timed test ❤️
drek231 [11]

Answer:

A.

Step-by-step explanation:

6 0
3 years ago
How many 2/3 go into 4
liraira [26]

Answer:

it goes into 4, <u>6 times</u>

Step-by-step explanation:

\frac{2}{3}  ÷  4

Hope this helps

6 0
4 years ago
Which probability is correct?<br> P(AB) = 1/2<br> P(BA) = 7/25<br> P(AC) = 6/23<br> P(CA) = 13/17
BartSMP [9]
I believe it is 1/2
5 0
4 years ago
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