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3 years ago

Can someone please help me with this one

Mathematics

1 answer:

s2008m [1.1K]3 years ago

8 0

Answer:

The answer is - 7.95

Step-by-step explanation:

$15.9x + c = 5.3(3x - 1.5) \\ 15.9x + c = 15.9x - 7.95 \\ c = - 7.95$

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Evaluate given function. Pleas helpp

Bad White [126]

Answer:

$f(9) =-80$

Step-by-step explanation:

Given

The attached functions

Required

Find f(9)

We have:

$f(x) =-x^2 - 2x + 19$

So:

$f(9) =-9^2 - 2*9 + 19$

$f(9) =-81 - 18 + 19$

$f(9) =-80$

6 0

3 years ago

I need the answer now!!

AVprozaik [17]

Answer:

10 ft^3

Step-by-step explanation:

if a cube is 1/3ft then 3 cubes = 1ft

then 30 cubes = 10ft^3

8 0

3 years ago

You bought a car for $50,000. Each year it depreciates in value by 7.5%.

sweet-ann [11.9K]

Answer:

y= 50,000(1-.075)^x

Step-by-step explanation:

The first year of depreciation is calculated by:

50,000 - (0.075)*(50,000) = 46,250

This can also be written as:

(50,000)*(1 - 0.075) [Pull out the 50,000]

The second year will depreciate starting with the $46,250 value at the end of the first year:

46,250 - (0.075)*(46,250) = 42,781

This may be written as:

(46,250)(1 - 0.075) = 42,781

The 46,250 was derived from the first year depreciation calculation, so we can substitute that instead of the 46,250:

((50,000)*(1 - 0.075))(1 - 0.075) = 42,781

This reduces to:

(50,000)*(1 - 0.075)^2 = 42,781. Note that the term (1-0.075) is now raised to the 2nd power. This power represents the 2nd year. Each succeeding year would be raised by one additional power, so that we can write a depreciated value after x years will be:

(50,000)*(1 - 0.075)^x

3 0

2 years ago

Which equation represents a parabola that has a focus of (0 0) and a directrix of y = 2

mel-nik [20]

ANSWER

$x ^{2} = - 4(y - 1).$

EXPLANATION

Since the parabola has the (0, 0) and the directrix at y=2.

The equation is of the form

${(x - h)}^{2} = - 4p(y - k)$

where (h,k) is the vertex.

The vertex is half way between the directrix and the focus.

The vertex will be at (0,1)

and is the distance from the vertex to the focus which is 1.

${(x - 0)}^{2} = - 4(1)(y - 1)$

$x ^{2} = - 4(y - 1)$

7 0

3 years ago

What is the distance between (-1, 4) and (5, 4)?

andreev551 [17]

Answer:

6 units

Step-by-step explanation:

when you graph the coordinates on a graph they are straight side ways from each other. then you count how (0,4) is 1 unit, (1,4) is 2 units, (2,4) is 3 units, (3,4) is 4 units, (4,4) is 5 units, and (5,4) is 6 units.

therefore the answer is 6 units.

hope this helps!

4 0

4 years ago

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