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ella [17]
3 years ago
11

Eva spent $11.61 downloading songs, each song cost $1.29. Four students wrote and solved equations to find s, the number of song

s that she downloaded. Which student wrote and solved the equation correctly?
A. Seba’s work
1.29s=$11.61
S=10
B. Ari’s work
$1.29s=$11.61
S=9
C.Erick’s work
S/$1.29=11.61
S=14.98
D. Daniel’s work
S/$1.29=$11.61
S=9
Mathematics
2 answers:
coldgirl [10]3 years ago
8 0

Answer:

answer b

Step-by-step explanation:

i took test

MrMuchimi3 years ago
5 0

Answer:

Option B.

Step-by-step explanation:

Let

s-----> the number of songs that Eva downloaded

we know that

The linear equation that represent the situation is

1.29s=11.61

Solve for s

Divide by 1.29 both sides

s=11.61/1.29

s=9\ songs

therefore

Ari's work is correct

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saul85 [17]

The equation of the ellipse in <em>standard</em> form is (x + 3)² / 100 + (y - 2)² / 64 = 1. (Correct choice: B)

<h3>What is the equation of the ellipse associated with the coordinates of the foci?</h3>

By <em>analytical</em> geometry we know that foci are along the <em>major</em> axis of ellipses and beside the statement we find that such axis is parallel to the x-axis of Cartesian plane. Then, the <em>standard</em> form of the equation of the ellipse is of the following form:

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Now, we proceed to find the vertex and the lengths of the semiaxes:

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Vertex

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V(x, y) = 0.5 · (3, 2) + 0.5 · (- 9, 2)

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The equation of the ellipse in <em>standard</em> form is (x + 3)² / 100 + (y - 2)² / 64 = 1. (Correct choice: B)

To learn more on ellipses: brainly.com/question/14281133

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Ivanshal [37]

Answer:

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