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Nookie1986 [14]
3 years ago
10

Q6 Q19.) Write the expression as the​ sine, cosine, or tangent of an angle. Then find the exact value of the expression.

Mathematics
1 answer:
Greeley [361]3 years ago
3 0
Using sin(A+B) = sinAcosB + cosAsinB

sin20cos40 + cos20sin40 = sin(20+40) = sin60degree

= \frac{ \sqrt{3}}{ 2}
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10x10x10 as an exponent
ollegr [7]
10x10x10 is 10 to the third so the base is 10 and exponent is 3 
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3 years ago
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If you go to bass basketball game at the MCI center to see the Washington wizards and the game begins at 7:05 PM and ends at 10:
ANTONII [103]
Simple
10.35 - 7.05
Answer 3h 30mins
8 0
3 years ago
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3 + 2x -y =0<br> -3 -7y = 10x​
sweet [91]

Answer:

(-1, 1)

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination
  • Solving systems of equations by graphing

Step-by-step explanation:

<u>Step 1: Define systems</u>

3 + 2x - y = 0

-3 - 7y = 10x

<u>Step 2: Rewrite systems</u>

3 + 2x - y = 0

  1. Add <em>y</em> to both sides:                    3 + 2x = y

<u>Step 3: Redefine systems</u>

y = 2x + 3

-3 - 7y = 10x

<u>Step 4: Solve for </u><em><u>x</u></em>

<em>Substitution</em>

  1. Substitute in <em>y</em>:                     -3 - 7(2x + 3) = 10x
  2. Distribute -7:                        -3 - 14x - 21 = 10x
  3. Combine like terms:            -14x - 24 = 10x
  4. Add 14x on both sides:        -24 = 24x
  5. Divide 24 on both sides:     -1 = x
  6. Rewrite:                                 x = -1

<u>Step 5: Solve for </u><em><u>y</u></em>

  1. Define original equation:                    -3 - 7y = 10x
  2. Substitute in <em>x</em>:                                     -3 - 7y = 10(-1)
  3. Multiply:                                                -3 - 7y = -10
  4. Add 3 to both sides:                            -7y = -7
  5. Divide -7 on both sides:                      y = 1

<u>Step 6: Graph</u>

<em>Check the solution set.</em>

4 0
2 years ago
ABCD is a square. Ifm/ABD = (5x – 20)°, what is the value of x?<br> B<br> E<br> C
olga2289 [7]
X=50

all four of a squares angles are 90°

90•3=270

270-20=250

250/5=50

x=50
4 0
2 years ago
Tanvi’s town voted on a new speed limit. Of the votes received, 20 were in favor of the new speed limit and 80 were opposed. Wha
vodomira [7]

it would be 20%

20 + 80 = 100

20 / 100 = 0.2

5 0
3 years ago
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