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3 years ago

HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP

Mathematics

2 answers:

shtirl [24]3 years ago

8 0

Answer:

first Q . mirror

Second Q. sight and touch

erma4kov [3.2K]3 years ago

7 0

Answer: Smoothest surface: mirror

senses being used: sight and touch

hope this helps!

Step-by-step explanation:

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8x -y=2. 5x-4y=3 please help solve this system by substition method

Vitek1552 [10]

8x-y=2 ---> y=8x-2
5x-4y=3

5x-4(8x-2)=3
5x-32x+8=3
-27x+8=3
-27x=-5
x= 5/27

8(5/27)-y=2
40/27-y=2
y=-14/27

6 0

3 years ago

Only answer if you actually want to help me please

mamaluj [8]

the answer is circle idk if it's right but it could be I'm in high school I've been through algebra 1 now in geometry

5 0

4 years ago

Use a product of two binomials to find a polynomial that represents the area of Roberto's plot.

Helga [31]

Answer:

First, we know that the area of a rectangle of width W and length L is:

A = W*L

In the case of Roberto's plan, we can see that the length of the whole rectangle is:

L = 1.5ft + x + 1.5ft = 3 ft + x

And the width is:

W = 3ft + x + 3ft = 6ft + x

Then the area of the whole thing is:

A = (3ft + x)*(6ft + x)

This is what we wanted, a product of two polynomials that represents the area of Roberto's plot.

Now if we subtract the white square (is a square of sidelength x, then its area is A = x*x) we will get the area of the border;

The total area of Roberto's borders is:

Area of the border = (3ft + x)*(6ft + x) - x*x

= 3ft*6ft + 3ft*x + x*6ft + x^2 - x^2

= x*9ft + 18ft^2

3 0

3 years ago

in Aprils DVD collection she has 8 action dvds 12 comedy DVDs 7 romance DVDs what percent of April's DVD collection are comedies

Artyom0805 [142]

Answer:

Step-by-step explanation:

<h3><u><em>Figure it out but your self.... Nawll i'm jp get it off google</em></u></h3>

7 0

3 years ago

The first step for deriving the quadratic formula from the quadratic equation, 0 = ax2 bx c, is shown.step 1: –c = ax2 bxwhich b

Ksju [112]

Answer:

option (b) is correct.

First step to solve for deriving the quadratic formula from the quadratic equation is completing the square.

Step-by-step explanation:

Given : the quadratic equation $ax^2+bx+c=0$

We have to find the first step for deriving the quadratic formula from the quadratic equation.

Quadratic formula is given by $\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Consider the given quadratic equation $ax^2+bx+c=0$

Divide the equation by a, we get,

$x^2+\frac{b}{a}x+\frac{c}{a}=0$

Take $\frac{c}{a}$ to other side, we get,

$x^2+\frac{b}{a}x=-\frac{c}{a}$

Add $(\frac{b}{2a})^2$ to both side, we get,

$x^2+\frac{b}{a}x+(\frac{b}{2a})^2=(\frac{b}{2a})^2-\frac{c}{a}$

Thus, the left side is in the form of $(a+b)^2=a^2+b^2+2ab$

On solving, we get,

$(x+\frac{b}{2a})^2=(\frac{b}{2a})^2-\frac{c}{a}$

Then solve for x , we get quadratic formula $\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Thus, first step to solve for deriving the quadratic formula from the quadratic equation is completing the square.

Thus, option (b) is correct.

3 0

3 years ago

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