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4 years ago

The diagonals of a square measure 18 cm. what is its length??

Mathematics

1 answer:

Dmitrij [34]4 years ago

8 0

Answer:

$\frac{9\sqrt{2} }{2}$ cm.

Step-by-step explanation:

A diagonal of a square + two of its sides creates a 45-45-90 triangle. The relation between the lengths of said triangle is 1:1:√2. In this case the diagonal is the √2 of the ratio.

That means that the side length should be 18/√2, as this times √2 makes 18.

18/√2 simplifies to (18√2)/2 = (9√2)/2.

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Find the slope and reduce. P=(-2, -1) Q=(6,5) Slope = [ ? ]

m_a_m_a [10]

Answer:

Slope=3/4

Step-by-step explanation:

1) Label all values with x1 y1, x2 y2

Then, plug jn each value into this equation:y2-y1/x2-x1

Remember that negative values will become positive when dealjng with a subtraction sign.

5-(-1)=5+1.

---------------= 6/8

6-(-2)=6+2

After getting 6/8, simplify by the gcf (2) to get 3/4

Answer:3/4

3 0

3 years ago

Solving systems by elimination 9x+3y=-3 2x-3y=-8

Alona [7]

Answer:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

−

Step-by-step explanation:

5 0

3 years ago

Graph the line with slope 7 and y-intercept -7

poizon [28]

Given :-

To graph the line with slope 7 and y intercept -7.

To Find :-

The graph of the line .

Solution :-

Here since the slope of the line is 7 and y intercept is -7 , we can use the slope intercept form of the line to find the equation of the line . The slope intercept form of the line is ,

$\longrightarrow$ y = mx + c

On putting the respective values ,

$\longrightarrow$ y = 7(x) + (-7)

$\longrightarrow$ y = 7x - 7

For the graph see attachment .

6 0

2 years ago

Please help, PLEASE will give brainlest answer

Korolek [52]

Answer:

SteAnswer:

y = 1/2x + 3/2

Step-by-step explanation:

Using the equation of the line

y - y_1 = m ( x - x_1)

First find the slope of the line

-2x + 4y = 8

It must be in this form

y = mx + C

4y = 8 + 2x

divide through by 4

4y/4 = 8 + 2x / 4

y = 8 + 2x/4

Let's separate

y = 8/4 + 2x/4

y = 2 + 1/2x

y = 1/2x + 2

Therefore, our slope or m is 1/2

Using the equation of the line

y - y_1 = m ( x - x_1)

With point (-5, -1)

x_1 = -5

y_1 = -1

y - (-1) = 1/2(x - (-5)

y + 1 = 1/2( x + 5)

Opening the brackets

y + 1 = x + 5 / 2

y = x + 5/2 - 1

Lcm is 2

y = x + 5 / 2 - 1/1

y = x + 5 -2/2

y = x +3/2

We can still separate it

y = x /2 + 3/2

y = 1/2x + 3/2

The equation of the line is

y = 1/2x + 3/2

The correct answer is A

brainliest?

8 0

3 years ago

Someone help ASAP for 5 points

prisoha [69]

Answer:

it may be 27

Step-by-step explanation:

12^2+16^2=400

square root 400= 20

36/16=2.25

12*2.25=27

6 0

3 years ago

The diagonals of a square measure 18 cm. what is its length??​

The diagonals of a square measure 18 cm. what is its length??