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MaRussiya [10]
3 years ago
11

Please help!! MATH | WILL MARK BRAINLIEST!! 40 POINTS

Mathematics
1 answer:
madreJ [45]3 years ago
3 0

Answer:

y = 9 cos [(⅕pi)x]

Step-by-step explanation:

Amplitude = 9

Period = 10

2pi/10 = pi/5

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(5x-4) (3x+2) multiply
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Answer:

15x^2-2x-8

Step-by-step explanation:

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ΔABC is a right triangle. Prove: a2 + b2 = c2 Right triangle BCA with sides of length a, b, and c. Perpendicular CD forms right
777dan777 [17]

Answer: Pythagorean Theorem Pieces of Right Triangles is not a justification for the proof.

Explanation : Here, \triangle ABC is a right triangle with sides a, b and c. Perpendicular CD forms right triangles BDC and CDA.

CD measures h units, BD measures y units, DA measures x units.

Draw an altitude from point C to Line segment AB Let segment BC = a segment CA = b, segment AB = c,  segment CD = h,  segment DB = y, segment AD = x,

y + x = c

a/c=y/a( Similarity theorem in triangles ABC and DBC )

a^2 = cy------(1) (Cross Product Property)

Similarly, b^2 = cx (Similarity theorem in triangles ABC and ADC)---------(2)

a^2 + b^2 = cy + cx(after adding equation (1) and (2) )

a^2 + b^2 = c(y + x)( By additional property of equality)

a^2 + b^2 = c^2. ( because y + x=c)

Thus, it has been proved that except Pythagorean Theorem Pieces of Right Triangles we use all other properties.

8 0
3 years ago
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Given m||n, find the value of x.<br> Please help with this one too this is hard
4vir4ik [10]

Answer:

111°

Step-by-step explanation:

The two angles are alternate exterior angles, and those types of angles are always congruent if there are parallel lines.

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Prove: an odd plus an odd equals an even
Brums [2.3K]

Answer:

Step-by-step explanation:

1+1=2

1+3=4

3+3=6

3+5=8

3+7=10

8 0
3 years ago
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