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Luda [366]
3 years ago
13

Anyone know this ? picture shown please help

Mathematics
1 answer:
valina [46]3 years ago
5 0

They're just after some straightforward algebra starting from the Law of Cosine.  We don't have to evaluate any trig functions or anything like that.

c^2 = a^2 + b^2 - 2ab \cos C

We move the c² and the cosine term to their other sides,

2ab \cos C = a^2 + b^2- c^2

That's it for the algebra.  

a,b and c are the side lengths opposite A,B and C respectively.  So a=4, b=5, c=2.

We substitute:

2ab \cos C = 4^2 + 5^2- 2^2 = 16 + 25 - 4 = 37

Answer: A. 37

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I had finish to solve the problems from the sentences,but I got stuck when I barely realized that the cost of one daylily I got
Genrish500 [490]
You lost minus when you were adding two equations.
-176= - 22x -12y
<span>144 =      6x   +12y
</span>-32= - 16x
x=2

88=11x+6y,
88=11*2+6y
6y=66
y=11

Check:
88=11x+6y=11*2+6*11=88 True
144=6x+12y=6*2+12*11=12+132=144 True

The cost of daylilies is $2.
The cost of pot of ivy is $11.


8 0
3 years ago
What is the square root of 24
RideAnS [48]
The square root of 24 is = 4.898979485566357
6 0
3 years ago
What is the solution to f(-2)=-|-2-2|
nexus9112 [7]

Answer:

f = -4

Explanation:

  • f(-2) = -|-2 - 2|

Subtract The Numbers: -2 - 2 = 4

f = -| -4|

Apply Absolute Rule (|-a| = a): |-4| = 4

f = -4

3 0
3 years ago
Read 2 more answers
Gilberto’s grandfather gives him $5 for his birthday and then $.50 for each math question he answers correctly on his math exams
Alexandra [31]

Answer:

<h3>Therefore total amount of money that he got is = $(5+0.50x)   [ x = number of correct math]</h3>

Step-by-step explanation:

Given, Gilberto's grandfather gives him $5 for his birthday and then$0.50 for each math he answers correctly on his math exam for the year.

Let , the number of math that he answers correctly on his his math exam for the year is x

Therefore he got = $(0.50× x) =$ 0.50x for doing correct math.

Therefore total amount of money that he got is = $(5+0.50x)   [ x = number of correct math]

5 0
3 years ago
0.4(5x – 12) + 0.5x = 15.2
kvasek [131]

<em>Look</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>attached</em><em> </em><em>picture</em><em> </em><em>⤴</em>

<em>Hope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em>

3 0
3 years ago
Read 2 more answers
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