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Digiron [165]
2 years ago
6

Can you please help me with my math thank you

Mathematics
1 answer:
gayaneshka [121]2 years ago
7 0
2•8.2•5.1=83.64 square feet.
ANSWER: 83.64 Square Feet
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Solve the equation for an ellipse for y. Assume that y > 0. y^2/a^2 + x^2/b^2 = 1
In-s [12.5K]
Multiply each term by a^2b^2:-

b^2y^2 + a^2x^2 = a^2b^2
subtract a^2x^2 from both sides
b^2y^2  = a^2b^2  - a^2x^2
Now divide both sides  by b^2

y^2 =  a^2 -  a^2x^2 / b^2  = a^2 (1 - x^2/b^2)

take positive square root ( because y > 0)

y  = a sqrt(1 - x^2/b^2)
4 0
3 years ago
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Which of the following are quadratic functions?<br> Check all that apply.
Elanso [62]
B and c, anything with an x^2 term is a quadratic.
8 0
3 years ago
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Find the average rate of change for f(x) = x2 + 9x + 18 from x = −10 to x = 10. A) 3 B) 7 C) 9 D) 11
Sergeeva-Olga [200]

Answer:

C

Step-by-step explanation:

The average rate of change of f(x) in the closed interval [ a, b ] is

\frac{f(b)-f(a)}{b-a}

Here [ a, b ] = [ - 10, 10 ], thus

f(b) = f(10) = 10² + 9(10) + 18 = 100 + 90 + 18 = 208

f(a) = f(- 10) = (- 10)² + 9(- 10) + 18 = 100 - 90 + 18 = 28, thus

average rate of change = \frac{208-28}{10-(-10)} = \frac{180}{20} = 9

3 0
3 years ago
What is the ratio of the number of days in the week that do not begin with the letter "T" to the number of days in the week that
ruslelena [56]

Answer:

  2 : 5

Step-by-step explanation:

2 days of the week begin with the letter T (Tuesday, Thursday).

5 days of the week do not begin with the letter T (Sunday, Monday, Wednesday, Friday, Saturday).

The ratio of those that do to those that do not is ...

  (begin with T) : (do not begin with T)

  2 : 5

6 0
3 years ago
If x^2=20, what is the value of x?
JulsSmile [24]

Answer:

x = 2√5 and x = - 2√5

Step-by-step explanation:

x^2 = 20

x = 2√5 and x = - 2√5

5 0
3 years ago
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