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3 years ago

7

Write the equation for an ellipse with the center at the origin, a vertical major axis of length 30, and a horizontal minor axis

of length 16.

2 answers:

velikii [3]3 years ago

7 0

Answer:

C

Step-by-step explanation:

hope that helps

goldfiish [28.3K]3 years ago

5 0

Answer:

B

Step-by-step explanation:

a = 30 b = 16

x²/b² + y²/a² = 1

x²/16² + y²/30² = 1

x²/256 + y²/900 = 1

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Kayla wants to find the width, AB, of a river. She walks along the edge of the river 65 ft and marks point C. Then she walks 25

AlladinOne [14]

Answer:

Part A) The triangles ABC and EDC are similar by AAA, because the three internal angles are equal in both triangles

Part B) The width of the river is about $39\ ft$

Step-by-step explanation:

we know that

If two triangles are similar, then the ratio of its corresponding sides is equal and its corresponding angles are congruent

Part A) we know that

In this problem , triangles ABC and CDE are similar by AAA, because its corresponding angles are congruent

so

m<DCE=m<ACB -----> by vertical angles

m<EDC=m<ABC -----> is a right angle

m<DEC=m<CAB -----> the sum of the internal angles must be equal to 180 degrees

Part B) we know that

The triangles ABC and EDC are similar -------> see Part A

therefore

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substitute the values and solve for AB

$\frac{65}{25}=\frac{AB}{15}$

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kkurt [141]

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solniwko [45]

Answer:

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