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2 years ago

PLEASE HELP QUICK it if for Geometry might award a Brainliest

Mathematics

1 answer:

soldi70 [24.7K]2 years ago

5 0

Answer:

SAS

Step-by-step explanation:

the reason that it is a sas angle is because C is in the middle and the two triangles stop at an angle to to this the angles are congruent and therefore similar

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if a rifleman averages 8 hits out of 10 shots at a target, what is the probability that he will hit the target in 3 out of 4 sho

ivann1987 [24]

Use binomial distribution

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2 years ago

Find the exact value of cot(15degrees) using half angle formulas?

liubo4ka [24]

Double angle (or half angle, depending how you look at it) identities:

$\cos^2\dfrac x2=\dfrac{1+\cos x}2$

$\sin^2\dfrac x2=\dfrac{1-\cos x}2$

$\implies\cot^2\dfrac x2=\dfrac{\cos^2\frac x2}{\sin^2\frac x2}=\dfrac{1+\cos x}{1-\cos x}$

So we have

$\cot^215^\circ=\dfrac{1+\cos30^\circ}{1-\cos30^\circ}=\dfrac{1+\frac{\sqrt3}2}{1-\frac{\sqrt3}2}$

$\implies\cot^215^\circ=7+4\sqrt3$

$\implies\cot15^\circ=\sqrt{7+4\sqrt3}=2+\sqrt3$

Note that when taking the square root, we should take into account that that could yield two possible solutions, but we know $\cos15^\circ>0$ and $\sin15^\circ>0$ , so it's also the case that $\cot15^\circ>0$ .

Also, the reason we have equality in the last step can be explained like so:

$7+4\sqrt3=4+4\sqrt3+3=4+4\sqrt3+(\sqrt3)^2=(2+\sqrt3)^2$

(not unlike the process used to complete the square)

8 0

3 years ago

Read 2 more answers

Giovanna owns a farm. She is going to randomly select one animal to present at the state fair. She has 6 pigs, 7chickens, and 10

Arada [10]

Answer:

The answer to your question is P(chicken) = 0.30

Step-by-step explanation:

Data

number of pigs = 6

number of chickens = 7

number of cows = 10

P(chicken) = ?

Process

1.- Sum up all the number of animals

Total animals = 6 + 7 + 10

= 23

2.- Calculate the probability

P(chicken) = number of chicken / total number of animals

-Substitution

P(chicken) = 7/23

-Simplification

P(chicken) = 0.30

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2 years ago

Consider the expression −2 + 5a + b + 2a − 5b.

liraira [26]

Like terms will have exactly the same variables

so 5a and 2a are like terms

examples :
3b and 4b are like terms
3b and 4a are not like terms
2a^2 + 3a^2 are like terms
2a and 3a^2 are not like terms
3ab and 4ba are also like terms...even though the variables are switched
6b^2a and 6a^2b are not like terms

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2 years ago

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Susan wants to find someone to do yard work at her house for the summer and fall seasons. WeWork charges a $200 fee and then a $

antiseptic1488 [7]

200+10h =200 +10 (5) = 250
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definitely merry's company

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3 years ago