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3 years ago

If a1=7 and d=28, find a9

Mathematics

1 answer:

Mariulka [41]3 years ago

6 0

Answer:

Step-by-step explanation:

Since a1=7 and the question is to find a9, you just have to multiply 7 and 9 which is 63

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Find the equation of the following ellipse based on the following information: Vertices: (-2,0), (2,0) minor axis of length 2

Sav [38]

Answer:

The expression of the ellipse is: $\frac{x^2}{4} + y^2 = 1$

Step-by-step explanation:

The equation of a ellipse can be written by the following expression:

$\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1$

Where 2a is the length of the major axis and 2b is the length of the minor axi. Since we were given the length of the minor vertex, then:

$2b = 2\\b = 1$

The length of the major axis is the distance between the two vertices.

$2a = \sqrt{[2 - (-2)]^2}\\2a = \sqrt{(2 + 2)^2}\\2a = \sqrt{4^2}\\2a = 4\\a = 2$

Therefore the expression of the ellipse is:

$\frac{x^2}{2^2} + \frac{y^2}{1^2} = 1\\\\\frac{x^2}{4} + y^2 = 1$

8 0

3 years ago

Please please helppppppp

Debora [2.8K]

Answer:

Pretty sure it's "A"

3 0

3 years ago

What is the range of the function y = 3x – 5 with the domain {0, 1, 2, 3}?

Gelneren [198K]

Answer:

Range: {-5, -2, 1, 4}

Step-by-step explanation:

y = 3x – 5

Domain: {0, 1, 2, 3}

Substitute each domain value into the equation to get its corresponding range value. Please see the attached image for solution:

6 0

3 years ago

Find the Area: 12 ft 12 ft

BigorU [14]

a=12 ft

Po=(0.25×π×a²)

Pc=a²+0.5×Po

Pc=a²+0.5×(0.25×π×a²)

Pc=a²×(1+0.5×0.25×π)

Pc=144×(1+0.5×0.25×π)

Pc≈200.55 ft²

8 0

3 years ago

Which of these has the LEAST number of factor pairs? A.6 B.9 C.18 D.19

dybincka [34]

6 = 1 x 6, 2 x 3
9 = 1 x 9, 3 x 3
18 = 1 x 18, 2 x 9, 3 x 6
19 = 1 x 19.
Your answer is D.) 19.

7 0

3 years ago

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