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nekit [7.7K]
2 years ago
14

Solve the equation. Show your work. 85 = 6b + 19

Mathematics
2 answers:
Elodia [21]2 years ago
8 0

This is how you do it:

85 = 6b + 19

85 - 19 = 6b + 19 - 19

66 = 6b

Divide 66 and 6b by 6

11 = b

patriot [66]2 years ago
8 0
Hope this helps! Message me with any questions :)

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PLEASE HELP ME.<br> THANKS!!!
Veronika [31]

Cos(x) = sin(x + 20o) Use the double cos angle formula

Cos(x) = sin(x)*cos(20) + cos(x)*sin(20) Divide through by cos(x). Tanx = sin(x)/cos(x)

1 = tan(x)*cos(20) + sin(20) Subtract sin(20) from both sides.

1 - sin(20) = tan(x)*cos(20) Calculate the value of 1 - sin(20)

0.65798 = tan(x) * 0.939692 Divide by cos(20)

tan(x) = 0.65795/0.939692

tan(x) = 0.70021 Take the inverse of 0.7) = tan(x)

x = tan-1(0.70021)

x = 35 degrees as expected.

Problem Two

The easiest way to do this is to pick random values and try it. The two acute angles are complementary. So 25 and 65 are random enough.

Let A = 25

Let C = 65

A

Tan(25) = sin(25)/sin(65) ; tan(25) = 0.4663.

sin(25)/sin(65) = 0.4663 Answer

B

Sin(90 - C) = Sin(A)

Tan(90 - A) = Tan(C)

So the question becomes Cos(A) = Tan(C) / sin(A)

Cos(25) = Tan(65)/Sin(25)

0.906 = ? 5.07 This statement isn't true.

C

Sin(65) = Cos(25)/Tan(65)

.906 = 0.4226 C is not the correct answer.

D

D isn't true. The tan does not relate that away. You can find it for yourself.

Cos(A) = Tan(C) You should get 0.906 = 2.14

E

Sin(C) = Cos(A) / Tan(A) I'll leave you to show this is wrong.

Problem 3

The diagram below is for this problem. Cos(x) = 50/100 = 0.5

x = cos-1(0.5)

x = 60 degrees.

Part 2

Sin(60) = opposite / hypotenuse

opposite = sin(60) * hypotenuse

opposite = 86.61 Be sure and round this to whatever the question says to round it to.



4 0
2 years ago
If CD= EF and EF = GH, then
Dmitry [639]
GH=CD i think im not really super outrageous with math 
6 0
3 years ago
What is the quotient: (3x2 + 8x – 3) ÷ (x + 3) ?. Answer. A) 3x + 5, r = 1. B) 3x – 1. C) 3x + 1. D) 3x – 5.
katen-ka-za [31]

B. 3x-1 is the answer.


Hope this helps and good luck. :)

4 0
2 years ago
Who are the Nepali people tell me​
madreJ [45]

Answer:

the people who live in nepal is called nepali people.

5 0
3 years ago
Read 2 more answers
Lin rode her bike 2 miles in 8 mins. She rode at constant speed. Complete the table to show the time it took travel different di
strojnjashka [21]

Answer:

4, 1

Step-by-step explanation:

If you take 2, 8 and make it a ratio you get 2 : 8.

Then you turn 2 : 8 into 1 : 4. That is your answer for a mile.

For the other answer, you want to divide 2 by 8.

(Hope this helps) :)  

8 0
3 years ago
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