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3 years ago

I don't quite get this.

Mathematics

2 answers:

lys-0071 [83]3 years ago

5 0

The answer is 35 French vanilla

den301095 [7]3 years ago

3 0

I think we need to divide some numbers there

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A 15-foot ladder leans against a house. The bottom of the ladder is 7 feet from the house. To the nearest degree, what angle doe

max2010maxim [7]

The ladder is forming a right triangle with the house. In this right triangle the hypotenuse is the measure of the ladder, and the distance between the house and he ladder is one of the sides of the triangle. To find the angle, $\alpha$ , that the ladder is making with the ground, we are going to use a trig function that relates the adjacent side of our angle with the hypotenuse. That trig function is Cosine.
$Cos \alpha = \frac{adjacent.side}{hypotenuse}$
$Cos \alpha = \frac{7}{15}$
$\alpha =arcCos( \frac{7}{15} )$
$\alpha =62.2$

We can conclude that the ladder make with the ground a 62° angle.

7 0

3 years ago

Simply the expression

sp2606 [1]

Answer:

5w^22

Step-by-step explanation:

7 0

2 years ago

If sin x = 1/4<br> and pi < x < 3pi/2 , find tan x exactly

arlik [135]

Answer:

$\sin(x) = \frac{1}{4} \\ { \sin }^{2} x = \frac{1}{16} \\ { \cos } x = \sqrt{1 - { \sin }^{2}x } \\ \cos(x) = \sqrt{1 - \frac{1}{16} } \\ \cos(x) = \sqrt{ \frac{15}{16} } \\ \tan(x) = \frac{ \sin(x) }{ \cos(x) } \\ \tan(x) = \frac{ \frac{1}{4} }{ \sqrt{ \frac{15}{16} } } \\ \tan(x) = 0.258$

5 0

3 years ago

4/? = ?/ 9

svet-max [94.6K]

Set ? as x, and cross-multiply.

so x^2= 36

x = 6 or x = -6

3 0

4 years ago

A square pyramid has a base with side lengths each measuring 40 inches. The pyramid is 21 inches tall, with a slant height of 29

melomori [17]

Answer:

3280 square inches

Step-by-step explanation:

The surface area of square pyramid = 4* the area of the triangular side + the area of the square base.

TRIANGULAR SIDE

The pyramid has an isosceles triangular side of size, a=40 inches, b= 29 inches, c = 29 inches.

Surface area = sqrt{ s(s-a)(s-b)(s-c) }

Where s= (a+b+c)/2

S= (40+29+29)/2 = 49

Surface area = sqrt{ 49(49-40)(49-29)(49-29)}

Surface area = 420 square inches

SQUARE BASE

Area of a square = a²

Area = 40² = 1600 square inches

Surface area of the pyramid = 4*420 + 1600 = 1680 + 1600

Surface area = 3280 square inches.

8 0

3 years ago

Read 2 more answers