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Zinaida [17]
2 years ago
9

The price of a cell phone can be modeled by the equation:

Mathematics
2 answers:
Igoryamba2 years ago
7 0
4 years I’m pretty sure.
Sergio039 [100]2 years ago
7 0

Answer:

4 years to cost $150

Step-by-step explanation:

Just add +15 to each year until $150

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Lines AB and CD are parallel. Find the measures of the three angles in triangle ABF.
NeX [460]

Answer:

42 Degrees

Step-by-step explanation:

Angle ABF is parallel to the angle DCF

7 0
2 years ago
Read 2 more answers
y = c1 cos(5x) + c2 sin(5x) is a two-parameter family of solutions of the second-order DE y'' + 25y = 0. If possible, find a sol
TEA [102]

Answer:

y = 2cos5x-9/5sin5x

Step-by-step explanation:

Given the solution to the differential equation y'' + 25y = 0 to be

y = c1 cos(5x) + c2 sin(5x). In order to find the solution to the differential equation given the boundary conditions y(0) = 1, y'(π) = 9, we need to first get the constant c1 and c2 and substitute the values back into the original solution.

According to the boundary condition y(0) = 2, it means when x = 0, y = 2

On substituting;

2 = c1cos(5(0)) + c2sin(5(0))

2 = c1cos0+c2sin0

2 = c1 + 0

c1 = 2

Substituting the other boundary condition y'(π) = 9, to do that we need to first get the first differential of y(x) i.e y'(x). Given

y(x) = c1cos5x + c2sin5x

y'(x) = -5c1sin5x + 5c2cos5x

If y'(π) = 9, this means when x = π, y'(x) = 9

On substituting;

9 = -5c1sin5π + 5c2cos5π

9 = -5c1(0) + 5c2(-1)

9 = 0-5c2

-5c2 = 9

c2 = -9/5

Substituting c1 = 2 and c2 = -9/5 into the solution to the general differential equation

y = c1 cos(5x) + c2 sin(5x) will give

y = 2cos5x-9/5sin5x

The final expression gives the required solution to the differential equation.

3 0
3 years ago
Help please will mark brainliest
ipn [44]

Answer:

459

Step-by-step explanation:

27 x 17= 459

3 0
2 years ago
If a road has a 4% grade and rises 200 feet, what is the run?
weeeeeb [17]
4% of the run is 200
as an equation 4%=0.04
0.04*run=200
so run=200/0.04
run=5000feet
6 0
3 years ago
Read 2 more answers
Please help me with this math problem!! :)
GarryVolchara [31]

Step-by-step explanation:

the following things are clear : opposite sides are of equal length, the sum of all angles in a square, rectangle or general parallelogram is 360 degrees, and opposite angles are equal.

so,

y² + 7 = 32

y² = 25

y = 5

2y² = k

2×5² = k

50 = k

the opposite angle of 150 is also 150 degrees.

the opposite angle of x is also x.

so, we have as sum of angles

360 = 150 + 150 + x + x = 300 + 2x

60 = 2x

x = 30 degrees

4 0
2 years ago
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