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den301095 [7]
2 years ago
5

What is the measure of angle a?​

Mathematics
1 answer:
Mkey [24]2 years ago
8 0

Answer:

38°

Step-by-step explanation:

Using the Cosine rule in Δ ABC

cos A = \frac{b^2+c^2-a^2}{2bc}

where a, b and c are the sides of the triangle.

Here a = 5, b = 3 and c = 7 , thus

cos A = \frac{3^2+7^2-5^2}{2(3)(7)} = \frac{9+49-25}{42} = \frac{33}{42} , thus

∠ A = cos^{-1} (\frac{33}{42} ) ≈ 38°

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hram777 [196]

Answer:

2/5 is fraction form.

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2 years ago
Find the distance between points P(8, 2) and Q(3, 8) to the nearest tenth.
riadik2000 [5.3K]
<span>First of all to calculate the distance between two points we can use distance formula
   
d=Square Root [(x2-x1)^2 + (y2-y1)^2]
   
Now substitute the given points p(x1,y1) and q(x2,y2)in above distance formula
   
The values are X2=3, X1=8and Y2=8and Y1=2.
   
After Substituting the values
   
d=Square Root[(-5)^2+(6)^2]
   
d=Square Root(25+36]
   
d=Square Root[61]
   
d=7.8
   
7.8 is the distance between points P(8, 2) and Q(3, 8) to the nearest tenth.</span>
7 0
3 years ago
the graph shows the amount of money paid when purchasing bags of carmel corn at the zoo. what is the constant of proportionality
Mars2501 [29]

Answer:

it would be pp

Step-by-step explanation:

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3 years ago
Rose’s Ringlets, a national hair salon, pays the following in employee benefits each pay period: $700 for health care, 10% of gr
Deffense [45]

Answer:

D $1298

Step-by-step explanation:

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3 0
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Answer:

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Step-by-step explanation:

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Basically it's switching the signs

Hope that helped :)

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