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4 years ago

HELP ASAP PLEASE!!!

Mathematics

1 answer:

Bumek [7]4 years ago

6 0

The answer would be D since the pattern is multiplying by negative 4 so 24 times -4 is -96.

You could also find it by dividing 384 by -4 and get -96 as well.

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PLEASE HELP ME ASAPPPP!!!!!

dimaraw [331]

X would be 4! Since there is a right angle the two sides making the right angle are even!

4 0

3 years ago

I need to know how to answer this

Alborosie

1.5r-5r+3r-8
Subtract 1.5r-5r= -3.5r
Add -3.5r+3r= -0.5r

The answer is -0.5 - 8

5 0

3 years ago

For what side length(s) is the area of an equilateral triangle equal to 30 cm?? Only enter the number, in centimeters, rounded t

xenn [34]

Answer: The sides length are 8.32 cm

Step-by-step explanation:

An equilateral triangle has all his sides of the same lenght, so we assume that the triangle has an L lenght in his sides.

The area of a triangle is $Area = \frac{base * height}{2}$ where the base is L, the Area is 30 and an unknown height.

To determine the height, we cut the triangle in half and take one side. By simetry, one side has a base of $\frac{L}{2}$ , a hypotenuse of L and a the unknown height.

Then we apply the <em>Pythagoras theorem</em>, this states that <em>in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides</em>, or, $hypotenuse = \sqrt{c^{2} + c^{2} }$ Where one c is $\frac{L}{2}$ and the other is the height.

Then we find one of the c of the equation wich will be the height.

$height = \sqrt{hypotenuse^{2}-base^{2} }$

$height = \sqrt{ L^{2} -\frac{L}{4} ^{2}}\\height = \sqrt{\frac{ 3L^{2}}{4} } \\\\height = \frac{\sqrt{3}L }{2}$

Finally, we use the triangle area mentioned before an find the value of L.

$30 = \frac{L*\frac{\sqrt{3}L }{2} }{2} \\\\L = \sqrt{\frac{120}{\sqrt{3} } } \\\\L = 8.32 cm$

6 0

3 years ago

The a area of a rectangle is 285 mm. if the leath is 18 mm what is the perimeter of a rectangle

scoundrel [369]

Area = 285mm²
Length = 18mm

We can find the width by dividing the area by the length.

$\frac{285}{18} = 15.8$ approximately.

2(18) + 2(15.8) = 67.6mm

5 0

4 years ago

Will give brainliest! which of the following correctly shows the beginning steps to solve this equation?

padilas [110]

2(7x - 3) = 9

step 1 : distribute thru the parenthesis......14x - 6 = 9
step 2 : add 6 to both sides.......14x = 15

7 0

3 years ago