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2 years ago

If x = 10, which lines are parallel? Check all that apply.

Mathematics

1 answer:

OlgaM077 [116]2 years ago

3 0

Answer:

The answer would be A. 1 1/5

Step-by-step explanation:

1 8/40 Simplify to 1 1/5

48/40 = 1 8/40

The answer to this question is above.

Hope this helps.

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Sviatoslav solved the quadratic equation x^2-x-1=0 by completing the square. In the process, he came up with the equivalent equa

zimovet [89]

Answer:

$x=\frac{1+\sqrt5}{2}$ and $x=\frac{1-\sqrt5}{2}$

and b= $\frac{5}{4}$

Step-by-step explanation:

We are given that a quadratic equation

$x^2-x-1=0$

We have to solve the equation by completing square and find the value of b.

$(x)^2-2\times x\times \frac{1}{2}+(\frac{1}{2})^2-(\frac{1}{2})^2-1=0$

$(x-\frac{1}{2})^2-\frac{1}{4}-1=0$

$(x-\frac{1}{2})^2-\frac{1-4}{4}=0$

$(x-\frac{1}{2})-\frac{5}{4}=0$

$(x-\frac{1}{2})^2-(\frac{\sqrt5}{2})^2=0$

$(x-\frac{1}{2})^2=(\frac{\sqrt5}{2})^2$

$x-\frac{1}{2}=\frac{\sqrt5}{2}$ and $x-\frac{1}{2}=-\frac{\sqrt5}{2}$

$x=\frac{\sqrt5}{2}+\frac{1}{2}=\frac{1+\sqrt5}{2}$

And $x=\frac{1}{2}-\frac{\sqrt5}{2}=\frac{1-\sqrt5}{2}$

Therefore, $x=\frac{1+\sqrt5}{2}$ and $x=\frac{1-\sqrt5}{2}$

and b= $\frac{5}{4}$

6 0

2 years ago

A 9.5 foot by 20 foot concrete wall is to be built using concrete blocks. Find the area of the wall

Yuki888 [10]

Answer:

190

Step-by-step explanation:

Just multiply the 2 together you bum

4 0

3 years ago

Read 2 more answers

50 POINTS !! PLEASE HELP !! ILL GIVE BRAINLIEST TO THE RIGHT ANSWERS.

Lesechka [4]

Answer:

53 centimeters

Step-by-step explanation:

Answer: 53 centimeters

6 0

2 years ago

The perimeter of a rectangle is 52. The length of the rectangle is six less than the width. Find the length and width of the rec

devlian [24]

Create expressions for the length and width of the rectangle.

length (l): x - 6
width (w): x

Perimeter: 2l + 2w

Substitute (x - 6) for l and (x) for w.

52 = 2(x - 6) + 2(x)

Distribute 2 inside the parentheses.

52 = 2x - 12 + 2x

Combine like terms.

52 = 4x - 12

Add 12 to both sides.

64 = 4x

Divide both sides by 4.

x = 16

Substitute 16 for x into the length and width of the rectangle.

length: (16) - 6 = 10
width: (16) = 16

3 0

3 years ago

Point A has coordinates (6,4) and point B has coordinates (2,7) write AB as column vector. Plz plz plz

Olenka [21]

Answer:

$\overrightarrow{AB }=\begin{bmatrix}-4\\3 \end{bmatrix}$

Step-by-step explanation:

Column Vector

Vectors are matrices having only one column or one row. A vector having only one column is called a column vector, and a vector having only one row is called a row vector.

It's required to find the vector AB as a column vector, and we are given the coordinates of A=(6,4) and B=(2,7).

The vector directed from A to B is found by subtracting its corresponding coordinates:

$\overrightarrow{AB }=$

Now we express the vector as a one-column matrix as follows:

$\overrightarrow{AB }=\begin{bmatrix}-4\\3 \end{bmatrix}$

7 0

2 years ago