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Anastaziya [24]
3 years ago
14

Omar wants to determine cos(- (2pi)/3) using the ratios of the 30 degrees - 60 degrees - 90 degrees right triangle . How shoulc

he use this information to determine cos(- (2pi)/7)
Mathematics
1 answer:
Zinaida [17]3 years ago
7 0

Answer:use the reference angle if a 30°and the fact that -2pi/3 is in the 3rd quadrant to determine coz

Step-by-step explanation:

i dont know if this is right just an educational guess, came here looking for the answer but couldn’t find it so

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22. The area of a triangle can be represented by the expression 14x^5 + 63x^2. If the base is 7x^2, write
kkurt [141]

Answer:

h = 4x ^ 3 + 18

Step-by-step explanation:

The first thing you should know for this case is that the area of a triangle is given by:

A = (1/2) * (b) * (h)

Where,

b: base.

h: height.

Clearing the height we have:

h = ((2) * (A)) / (b)

Substituting the values

h = ((2) * (14x ^ 5 + 63x ^ 2)) / (7x ^ 2)

Simplifying the expression:

h = ((2) * (2x ^ 3 + 9))

h = 4x ^ 3 + 18

answer

an expression to represent its height is

h = 4x ^ 3 + 18

4 0
3 years ago
Evaluate (-4)(8)(-1)=
BartSMP [9]

Your answer is 1,024. Hope this helps!


Work:

-4 x 8 = -32

-32 x -32 = 1,024

8 0
3 years ago
Step by step explanation thanks
Inessa [10]

Answer:

C= 7y +150

850

250

Step-by-step explanation:

The cost is 7 times y, the number of yearbooks, plus 150, the upfront cost.

7 times 100 is 700, plus 150 is 850.

1900-150 is 1750 divided by 7 is 250

7 0
3 years ago
Read 2 more answers
Molly has $60 in a savings account that earns 5% simple interest annually. How much interest will she earn in 6 months?
mrs_skeptik [129]

Answer:

The interest is $1.5 and the amount is $61.5.

Step-by-step explanation:

3 0
2 years ago
Which of the following is equal to 4 and 1 over 2 divided by 2 and 2 over 3?
Sphinxa [80]
4 and 1 over 2 times 2 and 3 over 2
4 0
3 years ago
Read 2 more answers
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