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KIM [24]
3 years ago
11

Can it figure how to do this cosine out

Mathematics
1 answer:
Gnesinka [82]3 years ago
3 0

Answer:

  BC= 14.6

Step-by-step explanation:

The law of cosines tells you ...

  BC² = AB² +AC² -2·AB·AC·cos(A)

  BC² = 9² +12² -2·9·12·cos(87°) ≈ 213.695

  BC ≈√213.695 ≈ 14.6

The length of BC is about 14.6 units.

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Using a System to Break Even
andreev551 [17]

Answer: P^2 - 10p + 24 = 0

Step-by-step explanation:

Given that a company’s weekly revenue, in thousands, is modeled by the equation

R = -p2 + 14p,

where p is the price of the product it makes. The company is considering hiring an outside source to distribute its products, which will cost the company 4p + 24 thousand dollars per week.

If the company want to break even, the cost of hiring distributors will be equal to the revenue per week.

Therefore,

-P^2 + 14p = 4p + 24

Collect the like terms

-P^2 + 14p - 4p - 24 = 0

-P^2 + 10p - 24 = 0

Multiply all by minus sign

P^2 - 10p + 24 = 0

8 0
3 years ago
sydney planted 5/9 of her fall flowers.she had 63 unplanted flowers to start.how many flowers does she have left to plant.?how m
PilotLPTM [1.2K]
35. 

5/9= 0.555555556

0.55555556*63=35

2/3= 0.6666666667

0.666666667*63= 42

63-35=28

42-28=14
She has 35 unplanted flowers and must plant 14 more in order to have filled 2/3 of her flower bed. 




8 0
3 years ago
Which formula should be used to find the circumference of a circle
aleksandrvk [35]


If a circle has radius
R, its circumference equals to
2πR where π is an irrational number that, approximately, equals to
3.1415926

7 0
3 years ago
Each batch of 24 cookies needs 2.25 cups of flour. If Stacy and her mom bake 3.5 batches, how much flour is
Vikentia [17]

Answer:

7 7/8 cups of flour

Step-by-step explanation:

2.25 times 3.5 equals 7.875

4 0
2 years ago
Graph the system of equations on graph paper to answer the question. Y=2/5x+4 and y=2x+12 what is the solution for this system o
riadik2000 [5.3K]

Answer:

Solution of the given equations is (-5,2)

Step-by-step explanation:

We have been given the following system of equations:

y = (2/5)x + 4

y = 2x + 12

The solution of the system of equation can be found by finding the point of intersection of both lines on the graph. The graph of both equations is attached below.

As we can see that both the lines intersect each other at one point, and that point is (-5,2). So the solution of the given equations is (-5,2)

6 0
3 years ago
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