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3 years ago

Please help!! I need to finish this quick

Mathematics

1 answer:

Natalija [7]3 years ago

4 0

Theorem: pythagorean

Equation: 5^2 + h^2 = 8^2

Solving:

25 + h^2 = 64
h^2 = 39
h =
$\sqrt{39 }$

Hope this helps!! :)

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In a theater, there are 4 long rows of chairs, each with an equal number of chairs. There are 5 short rows of chairs, each with

maw [93]

4(4+2) + 5(5+3)
4x6 + 5x8
24 + 40
64 is your answer

6 0

3 years ago

Lines 3x-2y+7=0 and 6x+ay-18=0 is perpendicular. What is the value of a?

BlackZzzverrR [31]

Answer:

$\boxed{\sf a = 9 }$

Step-by-step explanation:

Two lines are given to us which are perpendicular to each other and we need to find out the value of a . The given equations are ,

$\sf\longrightarrow 3x - 2y +7=0$

$\sf\longrightarrow 6x +ay -18 = 0$

Step 1 : Convert the equations in slope intercept form of the line .

$\sf\longrightarrow y = \dfrac{3x}{2} +\dfrac{ 7 }{2}$

and ,

$\sf\longrightarrow y = -\dfrac{6x }{a}+\dfrac{18}{a}$

Step 2: Find the slope of the lines :-

Now we know that the product of slope of two perpendicular lines is -1. Therefore , from Slope Intercept Form of the line we can say that the slope of first line is ,

$\sf\longrightarrow Slope_1 = \dfrac{3}{2}$

And the slope of the second line is ,

$\sf\longrightarrow Slope_2 =\dfrac{-6}{a}$

Step 3: Multiply the slopes :-

$\sf\longrightarrow \dfrac{3}{2}\times \dfrac{-6}{a}= -1$

Multiply ,

$\sf\longrightarrow \dfrac{-9}{a}= -1$

Multiply both sides by a ,

$\sf\longrightarrow (-1)a = -9$

Divide both sides by -1 ,

$\sf\longrightarrow \boxed{\blue{\sf a = 9 }}$

Hence the value of a is 9 .

8 0

3 years ago

what is c to the negative 3 power and d to the 5 power over f to the 3 power and g to the negative 7 power

julia-pushkina [17]

Answer:

C^-3+d^5/f^3+g^-7

Step-by-step explanation:

The answer is as seen above

8 0

2 years ago

What are expressions that are equivalent to -4/3p - 2/5?

slega [8]

-4/3 - 2/5

HOPE THAT HELPS DUDE

3 0

3 years ago

Winnnie has 7 soccer trophies she wants to display in a array. how many different arrays can she use

Katarina [22]

She has 7 soccer trophies.

So lets assume she wants to display it in a straight line:

The 1st has 7 ways

The 2nd has 6 ways

The 3rd has 5 ways

The 4th has 4 ways

until the last.

Total = 7 × 6 ×5 × 4 × 3 × 2 × 1 = 5040 ways.

3 0

3 years ago