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svetlana [45]
3 years ago
6

There are many answers not just one. I need help

Mathematics
2 answers:
Doss [256]3 years ago
8 0

Answer:

it's 3/4 feet

Step-by-step explanation:

serious [3.7K]3 years ago
3 0

Answer:

I think 1 and 5

Step-by-step explanation:

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Which will result in a difference of squares? (–7x + 4)(–7x + 4) (–7x + 4)(4 – 7x) (–7x + 4)(–7x – 4) (–7x + 4)(7x – 4)
maw [93]

You can simply expand each product and see whether it gives you a difference of squares.


•  \mathsf{(-7x+4)\cdot (-7x+4)}

That's actually  \mathsf{(-7x+4)^2:}

     \mathsf{(-7x+4)^2}\\\\ \mathsf{=(-7x+4)\cdot (-7x+4)}\\\\ \mathsf{=(-7x+4)\cdot (-7x)+(-7x+4)\cdot 4}\\\\ \mathsf{=49x^2-28x-28x+16}

     \mathsf{=49x^2-56x+16}        <span>✖

which is not a difference of squares.

</span>————<span>—

</span>•  \mathsf{(-7x+4)\cdot (4-7x)}

     \mathsf{=(-7x+4)\cdot 4-(-7x+4)\cdot 7x}\\\\ \mathsf{=-28x+16-(-49x^2+28x)}\\\\ \mathsf{=-28x+16+49x^2-28x}

     \mathsf{=49x^2-56x+16}        ✖

which is not a difference of squares.

—————

•  \mathsf{(-7x+4)\cdot (-7x-4)}

     \mathsf{=(-7x+4)\cdot (-7x)-(-7x+4)\cdot 4}\\\\ \mathsf{=49x^2-28x-(-28x+16)}\\\\ \mathsf{=49x^2-\diagup\!\!\!\!\! 28x+\diagup\!\!\!\!\! 28x-16}\\\\ \mathsf{=49x^2-16}

     \mathsf{=(7x)^2-4^2}        <span>✔

That is a difference of two squares.

</span>————<span>—

</span>•  \mathsf{(-7x+4)\cdot (7x-4)}

     \mathsf{=(-7x+4)\cdot 7x-(-7x+4)\cdot 4)}\\\\ \mathsf{=-49x^2+28x-(-28x+16)}\\\\ \mathsf{=-49x^2+28x+28x-16}

     \mathsf{=-49x^2+56x-16}        <span>✖

</span>which is not a difference of squares.

—————

Only the  third option  will result in a difference of squares.


Answer:  (− 7x + 4) · (− 7x − 4).


I hope this helps. =)

8 0
3 years ago
Read 2 more answers
Which of these coordinates would represent the intercepts of the graph of the function f(x)=3x-9
sukhopar [10]

Answer:

x    y

0    9

1     12

Step-by-step explanation:

Use the slope-intercept form to find the slope and y-intercept.

Slope:

3

y-intercept:

9

Any line can be graphed using two points. Select two

x

values, and plug them into the equation to find the corresponding

y

values.

Choose

0

to substitute in for

x

to find the ordered pair.

y

=

9

Choose

1

to substitute in for

x

to find the ordered pair.

y

=

12

Create a table of the

x

and

y

values.

x

y

0

9

1

12

Graph the line using the slope and the y-intercept, or the points.

Slope:

3

y-intercept:

9

x

y

0

9

1

12

image of graph

4 0
2 years ago
Read 2 more answers
Help please! This is due today in a few hours!!
avanturin [10]
Perimeter is 40 and area is 60 something. Sorry if I’m wrong I tried to help you tho. But If I am wrong look at other people’s answers
5 0
2 years ago
Q6: Find the first 3 terms of the sequence: a1 = 12, an = 3an-1 – 21<br> ,n&gt;2
trapecia [35]

Answer:

See below

Step-by-step explanation:

1. 12

2. 15   [3*12-21 = 15]

3. 24  [3*15-21 = 24]

4. 51   [3*24 - 21 = 51]

6 0
2 years ago
Two cars got an oil change at the same auto shop. The shop charges customers for each quart of oil plus a flat fee for labor. Th
amm1812
(5,22.45),(7,25.45)
slope = (25.45 - 22.45) / (7 - 5) = 3/2 or 1.5

y = mx + b
slope(m) = 1.5
use either of ur points...(5,22.45)...x = 5 and y = 22.45
now sub and find b
22.45 = 1.5(5) + b
22.45 = 7.5 + b
22.45 - 7.5 = b
14.95 = b

so ur equation is : y = 1.5x + 14.95.......this means that each quart of oil costs $ 1.50 and the labor fee costs $ 14.95
3 0
4 years ago
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