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2 years ago

I need help with these 2

Mathematics

1 answer:

VashaNatasha [74]2 years ago

5 0

For the first one you need to do
x+2+x+2+2x+4+2x+4
=6x+12

When doing this kind of problem you should use FOIL
First, Outer, Inner, Last
(x+2)(2x+4)
First- x•2x= 2x^2
Outer- x•4= 4x
Inner- 2•2x= 4x
Last- 2•4= 8

Combined you have
=2x^2+8x+8

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Abdullah expands (x - 3)2 and gets the answer x2 - 9. Describe what he has done wrong.

solniwko [45]

Answer:

He squared the numbers inside without following the appropriate rule

Step-by-step explanation:

what he should have done

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2 years ago

What if the GCF of 18 and 54?

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Answer:

18 is the GCF for 18 and 54

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For f(x) = x3 – x2, which gives an output of 48? O f(-8) O fl-4) O f(4) O f(8)

Misha Larkins [42]

Answer:

f(4)

Step-by-step explanation:

The output is the value of f(x) for a given value of x ( the input )

Substitute the given values of x into f(x) to determine the output, that is

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2 years ago

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Write an equation to represent the total amount Shauna will owe her parents

Misha Larkins [42]

This would actually be a very broad question. So, when considering these kinds of questions, one thing that we would really want to consider would be the $(x)$ value in this case. We would want to find the amount, and also the terms of the expression.

So, let's suppose that the amount would be 200.

And let's say that Shauna makes 5 a week.

Then the expression would then look like $\boxed{5w=200}$

$(w)=weeks \\ \\ (5)= how \ much \ she \ makes \ in \ a \ week. \\ \\ so \ we \ do \ the \ amount \ she \ makes, \ and \ then \ \\multiplied \ by \ the \ amount \ of 
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I hope this would help you in your case of the problem! :)

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2 years ago

What is the the area of a sector of a circle with a radius of 9 centimeters and formed by a central angle that measures 120

dem82 [27]

Answer:

27π cm²

Step-by-step explanation:

step 1

Find the area of the complete circle

The area of the circle is equal to

A=πr²

we have

r=9 cm

substitute

A=π(9)²=81π cm²

step 2

Remember that the area of complete circle subtends a central angle of 360°

using proportion

Find the area of a sector formed by a central angle that measures 120°

81π/360°=x/120°

x=120°*81π/360°

x=27π cm²

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