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k0ka [10]
3 years ago
7

Cos(3pi/4)= HELLPPPP

Mathematics
1 answer:
Kitty [74]3 years ago
5 0
3π/4 angle is in the second quadrant, so cos (3π/4) is going to be negative.

Reference angle of 3π/4 is (π - 3π/4) = π/4

cos(π/4) = √2/2

cos (3π/4) = - √2/2

Answer is C.
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In November 2010 the average price of 5 gallons of regular unleaded gasoline in the United states was $14.46. what was the price
Lapatulllka [165]

Propecia:

5 gallons ====== $ 14.46.

16 gallons ======= x dollars

X=16*14.46: 5=46.27  

Answer: $ 46.27.

3 0
3 years ago
M is between points C and Q. CM=17 and CQ=21. What is MQ?
katrin2010 [14]
Sometimes it helps to draw it out...

     (17)
C_______M_________Q
|___________________|
             21

therefore, CM + MQ = CQ
17 + MQ = 21
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MQ = 4 <===
8 0
2 years ago
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The area of a triangle is<br> A = bh/2<br> What would be the formula for h?
babymother [125]

Answer:

h = 2A/b

Step-by-step explanation:

multiply both sides by 2

2A = bh

divide both sides by b

2A/b = h

8 0
3 years ago
Evaluate each expression if a = 4.1, b = 5.7, and c=0.3.<br> 4. a+b-c <br> 5. 10-(a+b)<br> 6. B- c+2
posledela

Answer:

  • a+b-c = 9.5
  • 10-(a+b) = 0.2
  • b-c+2 = 7.4

Step-by-step explanation:

4)

Given the expression

a+b-c

  • a=4.1
  • b=5.7
  • c=0.3

substituting the values in the expression

a+b-c = 4.1+5.7-0.3

          =  9.8 - 0.3

          = 9.5

5)

Given the expression

10-(a+b)

  • a=4.1
  • b=5.7
  • c=0.3

substituting the values in the expression

10-(a+b) = 10 - (4.1+5.7)

              = 10 - 9.8

              = 0.2

6)

Given the expression

b-c+2

  • a=4.1
  • b=5.7
  • c=0.3

substituting the values in the expression

b-c+2 = 5.7 - 0.3 +2

          = 5.4 + 2

           = 7.4

7 0
2 years ago
The question I need help in is the middle one. PLEASE I NEED ANDWER ASAP!
antoniya [11.8K]

Answer:

3.25

Step-by-step explanation:

I plugged in 5 for x and got 3.25 when I solved

4 0
3 years ago
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