Given f(x) = 8x-15, find x when f(x) =9

Mathematics

1 answer:

lawyer [7]2 years ago

3 0

Answer:

72-15 = 57

Step-by-step explanation:

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Hello! answer Pls, No links.. (13 points and brainiest if i can).

Eva8 [605]

5. Is 1
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3 years ago

A high school teacher gives three regular exams during a semester and one final exam at the end of the semester. A student’s fin

statuscvo [17]

To get an average score of 80% (out of four exams), a total of 4*80%=320% is needed, so the minimum required for the 4th test is 320-(75+97+60)=88.
To get an average score of 89% (out of four exams), a total of 4*89%=356% is needed, so the maximum required for the 4th test is 356-(75+97+60)=124, which is impossible.
So the next exam grade must range between 88 and 100 to get a grade b in the class.

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2 years ago

What is the radius of a circle with a circumference of 30.4 feet? 4.8ft 3.4ft 6.3ft 9.7ft?

tankabanditka [31]

≈<span>4.8 ft is your answer</span>

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3 years ago

A multivitamin tablet contains 0.13g of vitamin C. How much vitamin C does a bottle of 20 tablets contain? Write your answer in

Digiron [165]

Answer:

2600mg

Step-by-step explanation:

0.13*20=2.6g

2.6g=2600mg

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2 years ago

Statuary Hall is an elliptical room in the United States Capitol in Washington, D.C. The room is also called the Whispering Gall

dalvyx [7]

Answer: a) $\frac{x^{2} }{2352.25 }$ + $\frac{y^{2} }{529}$ = 1

b) The distance of two foci is 85.4 feet

c) Area = 3502.67 square feet

Step-by-step explanation: a) An ellipse has the equation in the form of:

$\frac{x^{2} }{a^{2} }$ + $\frac{y^{2} }{b^{2} }$ = 1, where a is the horizontal axis and b is the vertical axis.

For the Statuary Hall, a = $\frac{97}{2}$ = 48.5 and b = $\frac{46}{2}$ = 23, so the equation will be

$\frac{x^{2} }{2352.25 }$ + $\frac{y^{2} }{529}$ = 1.

b) To determine the distance of the foci, we have to calculate 2c, where c is the distance between one focus and the center of the ellipse. To find c, as a, b and c create a triangle with a as hypotenuse:

$a^{2}$ = $b^{2} + c^{2}$