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3 years ago

JELP HURRY !!!!!!!!!

Mathematics

1 answer:

Tems11 [23]3 years ago

5 0

You should be able to set up a proportion between the sides something like (18+x)/x=(56+21)/56

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How many possible combinations of 6 numbers?

enot [183]

9*8*7*6*5*4 = 60480. Hope this helps !!!!!!!!!!!!!!!!!!!1

8 0

3 years ago

A pizza has a circumference of 12 inches. Find the exact area of the pizza. Use 13.4 for pi.

denis-greek [22]

Answer: 113.04

Step-by-step explanation:

4 0

3 years ago

If (5x− 4)(3x+ 7) = 15x²-ax-b,then find the value of a and b

Mkey [24]

Answer:

$a=-23\\\\b=28$

Step-by-step explanation:

Let's start by using distributive multiplication:

$(a\pm b)(c\pm d)=ac\pm ad \pm bc \pm bd$

So:

$(5x-4)(3x+7)=15x^2+35x-12x-28\\\\$

Grouping like terms:

$15x^2 +(35x-12x)-28\\\\15x^2+23x-28$

Now, $15x^2+23x-28$ is equal to:

$15x^2-ax-b$

In this sense:

$15x^2+23x-28=15x^2-ax-b$

In order to satisfied the equality:

$23x=-ax\hspace{10}(1)\\\\and\\\\-28=-b\hspace{10}(2)$

Hence, from (1), let's solve for a:

$23x=-ax\\\\-a=\frac{23x}{x} \\\\-a=23\\\\a=-23$

And from (2), let's solve for b:

$-28=-b\\\\b=28$

Let's verify the result evaluating the values of a and b into the original equation:

$(5x-4)(3x+7)=15x^2+23x-28=15x^2 -ax -b\\\\(5x-4)(3x+7)=15x^2+23x-28=15x^2 -(-23)x -(28)\\\\(5x-4)(3x+7)=15x^2+23x-28=15x^2 +23x -28$

As you can see, the values satisfy the equation, therefore, we can conclude they are correct.

3 0

3 years ago

A. Write the linear system as a matrix equation

umka21 [38]

AX = B

1 -1 -1 x 0
0 -2 -1 y = -2
2 1 0 z -4

x
y = A^-1 B
z

x -1 1 1 0 6
y = 2 -2 -1 . 2 = -8
z -4 3 2 4 14

7 0

2 years ago

What is property demonstrated mean?

OLEGan [10]

Hi Mackenzie

Property demonstrate : Is when you show the truth of what you've solved or something else.

Like for example you said square root of 4 is 2 . Now you have to use the property demonstration to show the proof why its 2.

Got it?

I hope that's help:)

7 0

3 years ago