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baherus [9]
3 years ago
13

Can someone plz help me w this

Mathematics
2 answers:
allochka39001 [22]3 years ago
6 0
4x2 is 16x
(3x-1, 3-x : 2x+2)
18x+11
Rasek [7]3 years ago
3 0
(3x - 1)(3 -x)+x^2 + 19

a)
(3x - 1)(3 -x)+x^2 + 19
=9x - 3x^2 - 3 + x + x^2 + 19
= -2x^2 + 10x + 16

b) evaluate at x = 2

-2x^2 + 10x + 16
= -2 (2^2) + 10(2) + 16
= -8 + 20 + 16
= 28

c) 
from part (a) 
-2x^2 + 10x + 16

= -2 (x^2 - 5x - 8) (complete factor)
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Eli ran 3/4 of a mile. Every 1/8 of a mile, he jumped over a hurdle. There was a final hurdle at the 3/4 mile park. How many hur
agasfer [191]
Divide 3/4 by 1/8 and you should get 6 hurdles.
5 0
3 years ago
What is the center of the ellipse x2+5y2–45=0?
jeka94

Answer:

Center is at (0,0)

Step-by-step explanation:

An equation of ellipse in standard form is:

\displaystyle{\dfrac{(x-h)^2}{a^2}+\dfrac{(y-k)^2}{b^2} = 1

Where center is at point (h,k)

From the equation of \displaystyle{x^2+5y^2-45=0}. First, we add 45 both sides:

\displaystyle{x^2+5y^2-45+45=0+45}\\\\\displaystyle{x^2+5y^2=45}

Convert into the standard form with RHS (Right-Hand Side) equal to 1 by dividing both sides by 45:

\displaystyle{\dfrac{x^2}{45}+\dfrac{5y^2}{45}=\dfrac{45}{45}}\\\\\displaystyle{\dfrac{x^2}{45}+\dfrac{y^2}{9}=1}

Therefore, the center of ellipse is at (0,0) since there are no values of h and k.

8 0
2 years ago
A rectangle and an equilateral
jek_recluse [69]

Answer:

The area of the rectangle = 50 cm^2.

Step-by-step explanation:

Let the shortest side of the rectangle be x cm.

Perimeter of the rectangle is:

2x + 2(x + 5).

Perimeter of the triangle =  3 * 2x.

As they have the same perimeter:

2x + 2(x + 5) = 3*2x

2x + 2x + 10 = 6x

6x - 2x - 2x = 10

2x = 10

x = 5 cm.

So the area of the rectangle = x(x + 5)

= 5 * 10

= 50 cm^2.

4 0
3 years ago
Translate the algebraic expression below into a written expression.
Vinvika [58]
The absolute value of the quantity of five times x added to nine.
This will be answer .
3 0
3 years ago
Halla la diferencia de 2 numeros si su MCD es 48 y su suma es 288
Murrr4er [49]

    SUM:                x + y = 288

DIFFERENCE:   +  <u>x - y =  48 </u>

                            2x     = 336

                             x      = 168

 SUM: x + y = 288  →   (168) + y = 288   →   y = 120

Answer: 120, 168

7 0
4 years ago
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