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andrew-mc [135]
3 years ago
9

When the square of a certain number is diminished by 9 times the number the result is 36?

Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
3 0
X²-9x=36
minus 36 both sides
x²-9x-36=0
what 2 numbers multiply to -36 and add to -9
-12 and 3
(x-12)(x+3)=0
set to zero
x-12=0
x=12

x+3=0
x=-3



the number is either -3 or 12
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Help please. Screenshot included.
Alla [95]

The following information will help us with this problem:

\sqrt[m]{x^n} = x^{\frac{n}{m}


When we use that information in the context of this problem, we can find:

\sqrt[4]{15^7} = 15^{\frac{7}{4}}


Thus, a = 15, b = 7, and c = 4.

4 0
3 years ago
Answers and work for answers please
larisa [96]

Answer:

1) 5 2) 6 3) 1.25 or -1.75

Step-by-step explanation:

1. x^2 - 25 = 0

x^2 - 25 = 0

First, add 25 to both sides!

x^2 = 25

Now square root both sides.

x = 5

2.  (x-2)^2 = 16

First, square root both sides.

(x-2) = 4

Add 2 on both sides.

(x) = 6

x = 6

3. Quadratic Formula = -b ± \sqrt{b^{2}-4ac } / 2a

Substitute in:

-6 ±\sqrt{7^{2} -4(2)(6)} / 2(2)

-6±\sqrt{49 - 48} / 4

Both forms:

-6 + \sqrt{1} / 4

5 / 4 = 1.25

Negative:

-6 - 1 / 4

-7 / 4 = -1.75

8 0
2 years ago
F(x)= -2 |x-2|+ 4 vertically stretched by a factor of 2.
Veronika [31]

Answer:

f(x) = 4x^2 +2,

 is the function

Step-by-step explanation:

if i get this wrong imma tie a brick to my feet and jump in the ocean

6 0
2 years ago
Someone please help me in this question it is kind of confusing it is a question under pre calculus in first year calculus i wil
masya89 [10]
Neither P, nor A are on the sketch 
I guess P is the upper right corner of the rectangle 
and A=(0,1) 

P belongs to the line going through (1,0) and B(0,y) 
<span>but we don't know the y-coordinate of B </span>

<span>the triangle is right and isosceles, so pythagoras a²+a²=2² ... 2a²=4 ... a²=2 ... a=sqrt2 </span>
now look at the right triangle BOA 
<span>his hypotenuse is AB=sqrt2 and the <span>the kathete</span> OA is 1 </span>
so y²+1²=(sqrt2)² ... y²+1=2 ... y²=1.. y=1 
so the coordinates of B are (0,1) 

the line going through (1,0) and (0,1) is L(x)=-x+1 

P belongs to this line, so the coordinates of P are P(x,-x+1) (0<x<1) 

b) so if that's P, the height of the rectangle is -x+1 and the width=2x 
<span>so its area A(x)=2x*(-x+1)= -2x²+2x 

I hope my answer has come to your help. Thank you for posting your question here in Brainly.

</span>
5 0
3 years ago
28/36 reduced fraction
ratelena [41]
28/4 = 7,
36/4 = 9,
Place the 7 over the 9 and you get 7/9!
6 0
4 years ago
Read 2 more answers
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