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blsea [12.9K]
3 years ago
10

What is 3x+X short answer

Mathematics
1 answer:
nikdorinn [45]3 years ago
8 0

4x................... I hope it helps

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PLEASE HELP FAST!
svetlana [45]

Answer:

B

Step-by-step explanation:

y × y = y^{2}

y × -3 = -3y

y^{2} -3y

4 0
3 years ago
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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
I dont understand linear equations,what is the purpose of a linear equation?
Darina [25.2K]

A linear equation in two variables describes a relationship in which the value of one of the variables depends on the value of the other variable. In a linear equation in x and y, x is called x is the independent variable and y depends on it. We call y the dependent variable.

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3 years ago
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Help pls...and thank you..
Allisa [31]

Answer:

0 chance because there is no black ones but you would probably pick a yellow one bigger chance for yellow jelly bean.

Step-by-step explanation:

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Line m is parallel to Line n.
soldi70 [24.7K]
I hope this helps. Have a good day.

6 0
2 years ago
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