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3 years ago

PLEASE HELP

Mathematics

2 answers:

Temka [501]3 years ago

8 0

Answer:

He or she above is correct, just did it on edge 2020

Fudgin [204]3 years ago

8 0

Answer:

7.5x and y = 5.5x + 10

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1. Bob tried to answer the following question by finding the missing angle and rounding the answer to the nearest degree.

iren2701 [21]

Answer:

Part 1)

Bob's mistake was to have used the cosine instead of the sine

The measure of the missing angle is $53.13\°$

Part 2) The surface area of the pyramid is $288\ cm^{2}$

Step-by-step explanation:

Part 1)

Let

x----> the missing angle

we know that

In the right triangle o the figure

The sine of angle x is equal to divide the opposite side angle x to the hypotenuse of the right triangle

$sin(x)=\frac{16}{20}$

$x=arcsin(\frac{16}{20})=53.13\°$

Bob's mistake was to have used the cosine instead of the sine

Part 2) we know that

The surface area of the square pyramid is equal to the area of the square base plus the area of its four lateral triangular faces

$SA=b^{2}+4[\frac{1}{2}(b)(h)]$

where

b is the length side of the square

h is the height of the triangular lateral face

In this problem

$h=b/2$ -------> by an 45° angle

$b=2h$

$sin(45\°)=\frac{h}{6\sqrt{2}}$

$h=6\sqrt{2}(sin(45\°))=6\ cm$

Find the value of b

$b=2(6)=12\ cm$

Find the surface area

$SA=12^{2}+4[\frac{1}{2}(12)(6)]=288\ cm^{2}$

3 0

4 years ago

Find the missing length of the right triangle.

OLga [1]

Hopes this helps:

Answer: 65

Please mark as brainlist if it’s right.

Have a great day.

7 0

3 years ago

Ran 2 miles Jesse ran four times as far there are 5280 feet in a mile how many feet did Jesse run

ella [17]

2 times 4= 8

8 times 5280= 42240

5 0

3 years ago

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Find the value for the side marked below.

GarryVolchara [31]

Answer:

$65.4$

Step-by-step explanation:

In any right triangle, the cosine of an angle is equal to its adjacent side divided by the hypotenuse, or longest side, of the triangle.

Therefore, we have:

$\cos 61^{\circ}=\frac{y}{135},\\t=135\cos 61^{\circ}=65.4492987333\approx \boxed{65.4}$

3 0

3 years ago

A parallelogram has a base length of 9.3 inches and an area of 56.73 squared inches. Find the height of the parallelogram.

Studentka2010 [4]

Answer:

the answer is 6.1

Step-by-step explanation:

h= A over B (means you divide) and you get 6.1

7 0

3 years ago

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