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a_sh-v [17]
3 years ago
8

Let f(x) = x 7 and g(x) = x − 4. find f(x) ⋅ g(x).

Mathematics
2 answers:
scoundrel [369]3 years ago
5 0

Answer:

x^2+3x-28

Step-by-step explanation:

(x+7)(x-4) multiply the parentheses

x^2-4x+7x-28 combine like terms

x^2+3x-28

nikklg [1K]3 years ago
4 0
F(x) = x⁷

g(x) = x - 4

f(x).g(x) = <span>x⁷*(x - 4) = x</span>⁸ - 4x⁷
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Could Keenan have started with 6 strawberries? Use your expression to explain why or why not.
Dahasolnce [82]

<em>Note: you may have unintentionally missed to add the complete question. Therefore, after a little research, I am able to find the complete question which I am attaching to solve your query, which anyways would clear your concept. </em>

The complete Question:

Keenan gives Tisha half of his strawberries. Tisha keeps 4 of the strawberries she got from Keenan and gives the rest to Suvi.

a) Write an expression for the number of strawberries Tisha gives to Suvi. Use k for the number of strawberries Keenan started with.

b) Could Keenan have started with 6 strawberries? Use your expression to explain why or why not.

Answer:

Part a)

An expression for the number of strawberries Tisha gives to Suvi will be:<em> </em>n=\frac{k}{2} -4

Part b)

Keenan could not have started with 6 strawberries

Step-by-step explanation:

Part a) <em>Write an expression for the number of strawberries Tisha gives to Suvi. Use k for the number of strawberries Keenan started with.</em>

Let k be the total number of strawberries which Keenan has.

So,

\frac{k}{2} is the number of strawberries Keenan gave to Tisha.

As Tisha keeps 4 strawberries and gives the rest to Suvi. Let n be the number of strawberries which Suvi has.

So,

n=\frac{k}{2} -4

\frac{k}{2}=n+4

k=2n+8

Therefore, an expression for the number of strawberries Tisha gives to Suvi will be:<em> </em>n=\frac{k}{2} -4

b) Could Keenan have started with 6 strawberries? Use your expression to explain why or why not.

Considering the expression for the number of strawberries Tisha gives to Suvi

n=\frac{k}{2} -4

Putting k = 6 in the expression

n=\frac{6}{2} -4

Solving the expression

n=3-4         ∵ \mathrm{Divide\:the\:numbers:}\:\frac{6}{2}=3

\mathrm{Subtract\:the\:numbers:}\:3-4=-1

n=-1

So, Keenan would have started with 6 strawberries, then Suvi would have -1 strawberries. Since, strawberries cannot be negative as Suvi cannot have negative number of strawberries.

Therefore, Keenan could not have started with 6 strawberries.

Keywords: word problem, expression

Learn more about word problem from brainly.com/question/3196729

#learnwithBrainly

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