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3 years ago

Please help please please please

Mathematics

1 answer:

Readme [11.4K]3 years ago

8 0

It is a low posabilaty

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What is the value of f(4) in the function below? f(x) = -1/1·2x A. 16 OB. 8 C. 2 OD. 4

exis [7]

Answer: 4

Step-by-step explanation:

$f(4)=\frac{1}{4} \cdot 2^{4}=\frac{1}{4} \cdot 16=4$

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2 years ago

The length of a rectangle is 5 ft less than three times the width, and the area of the rectangle is 50 ft². Find the dimensions

Mariulka [41]

Answer

Length = 10 ft

Width = 5 ft

Explanation

Area of the rectangle given = 50 ft²

Let the width of the rectangle be x

So this means the length of the rectangle will be 3x - 5

What to find:

The dimensions of the rectangle.

Step-by-step solution:

Area of a rectangle = length x width

i.e A = L x W

Put A = 50, L = 3x - 5, W = x into the formula.

$\begin{gathered} 50=(3x-5)x \\ 50=3x^2-5x \\ 3x^2-5x-50=0 \end{gathered}$

The quadratic equation can now be solve using factorization method:

$\begin{gathered} 3x^2-5x-50=0 \\ 3x^2-15x+10x-50=0 \\ 3x(x-5)+10(x-5)=0 \\ (3x+10)(x-5)=0 \\ 3x+10=0\text{ }or\text{ }x-5=0 \\ 3x=-10\text{ }or\text{ }x=5 \\ x=-\frac{10}{3}\text{ }or\text{ }x=5 \end{gathered}$

Since the dimension can not be negative, hence the value of x will be = 5.

Therefore, the dimensions of the rectangle will be:

$\begin{gathered} Length=3x-5=3(5)-5=15-5=10\text{ }ft \\ \\ Width=x=5\text{ }ft \end{gathered}$

7 0

1 year ago

A walkway forms one diagonal of a square playground. The walkway is 18 m long.

olga55 [171]

18m x 4 = 72m

Walkway = 72 meters.

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3 years ago

SMART PPL PLEASE HELP MEEEE

Neko [114]

Answer:

it's 80% of 125

the value of x = 125

Step-by-step explanation:

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3 years ago

I a so desperate please help me whats the difference between diabetes type 1 and 2 please im begging please help me.

Tems11 [23]

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3 years ago

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