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nika2105 [10]
3 years ago
5

HELP! Will mark Brainiest

Mathematics
1 answer:
Licemer1 [7]3 years ago
4 0

Answer:

y = 4.2

Step-by-step explanation:

Pythagorean thearom: a^2+b^2=c^2

3^2+3^2=c^2

9+9=c^

sqrt18=sqrt/c^2

4.2 = c

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Does the point (–3, 4) satisfy the equation y = –2x + 5? Yes Or No
Mekhanik [1.2K]

Answer:

No

Step-by-step explanation:

y = -2x + 5

4 = -2(-3) + 5 - Substitute both x and y

4 = 6 + 5 - Simplify

4 ≠ 11

Hence, no, (-3, 4) doesn't statify the equation y = -2x + 5

6 0
2 years ago
Solve for v -2(3v-3)+2v=8+2(3v-9)
sweet [91]

Answer: V=8/5 or V=1.6 or V=1 ,3/5  / is over i dont know how the write 8

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on here

5 0
3 years ago
Read 2 more answers
Prove the identity.
Delvig [45]

Answer:

D. Pythagorean

Step-by-step explanation:

Given the identity

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Starting from the left hand side

cos²x - sin²x ... 1

According to Pythagoras theorem, we know that x²+y² = r² in a right angled triangle. Coverting this to polar form, we have:

x = rcostheta

y = rsintheta

Substituting into the Pythagoras firnuka we have

(rcostheta)²+(rsintheta)² = r²

r²cos²theta+r²sin²theta = r²

r²(cos²theta+sin²theta) = r²

(cos²theta+sin²theta) = 1

sin²theta = 1 - cos²theta

sin²x = 1-cos²x ... 2

Substituting equation 2 into 1 we have;

= cos²x-(1-cos²x)

= cos²x-1+cos²x

= 2cos²x-1 (RHS)

This shows that cos²x -sin²x = 2cos²x-1 with the aid of PYTHAGORAS THEOREM

5 0
3 years ago
Factor completely. 492 – 9 =?​
leonid [27]

Answer:

483

Step-by-step explanation:

5 0
3 years ago
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Pythagorean theorem If l = 12 cm and m = 35 cm, what is the length of n?
poizon [28]
If n is the hypotenuse, then it is 37. L can't be the hypotenuse and if m is the hypotenuse then n is 32.878
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3 years ago
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