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sergeinik [125]

4 years ago

13

I need help on this question plz answer me

1 answer:

tigry1 [53]4 years ago

4 0

$\frac{7!}{2!} < \frac{7!}{5!2!} \implies \\ 1 > \frac{1}{5!}$ which is true so you're right

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If cos 65 degree +cos 55 degree = cos θ, find θ in radians

belka [17]

We have to find t(theta) in radians.
cos t = cos 65° + cos 55°
We know that:
cos x + cos y = 2 · cos (x+y)/2 · cos (x - y)/2
cos t = 2 · cos (65°+55°)/2 · cos (65°-55°)/2
cos t = 2 · cos 60°· cos 5°
cos t = 2 · 1/2 · cos 5°
cos t = cos 5°
t = 5° = π/36 radians

7 0

3 years ago

Find the perimeter of the triangle with these vertices. (−5,4), (3,1,) ,( −5,1) Give an exact answer (not a decimal approximatio

scoundrel [369]

Answer:

The answer to your question is Perimeter = 11 + $\sqrt{73}$

Step-by-step explanation:

Data

P (-5, 4)

Q (3, 1)

R (-5, 1)

Process

Calculate the distance between the points and sum up the results

a)

dPQ = $\sqrt{(-5 - 3)^{2} + (4 - 1)^{2}}$

dPQ = $\sqrt{(-8)^{2} + 3^{2}}$

dPQ = $\sqrt{64 + 9}$

dPQ = $\sqrt{73}$

dQR = $\sqrt{(-5 - 3)^{2} + (1 - 1)^{2}}$

dQR = $\sqrt{8^{2}}$

dQR = 8

dPR = $\sqrt{(-5 + 5)^{2}+ (1 - 4)^{2}}$

dPR = $\sqrt{3^{2}}$

dPR = 3

b)

Perimeter = $\sqrt{73}$ + 8 + 3

Perimeter = 11 + $\sqrt{73}$

3 0

3 years ago

Find the Y intercept 4Y - 2X = 16

rusak2 [61]

Answer:

y=4+1/2x

4y = 16 + 2x

divide both sides by 4

y=4 + 1/2x

8 0

4 years ago

Pls help me with my math

xxTIMURxx [149]

Answer:a

Step-by-step explanation:Bottom line includes the end point so should be less than or equal. Top line does not so should be greater than

4 0

3 years ago

HOW MANY DEGREES IN A SUPPLEMENTARY ANGLE???

monitta

Answer:

180 degrees

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers