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GalinKa [24]
3 years ago
9

Brody had his computer repaired at Store A. His bill was:

Mathematics
1 answer:
muminat3 years ago
5 0

Answer:

1200 x 15%= $180.00

you don't need to add Gratuity on the Sales Tax

Step-by-step explanation:

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Find the Percent:
ycow [4]

Step-by-step explanation:

First, find 12 percent of 1,150,

12 percent of 1,150 = 138.

Now, add 1,150 + 138,

1,150 + 138 = 1,288

Hope I helped, if not, at least I tried.

6 0
3 years ago
Whats the answer two 4x+3=19
docker41 [41]
5.5  PM if you have any further questions 
5 0
3 years ago
Read 2 more answers
Consider the system of differential equations dxdt=−4ydydt=−4x. Convert this system to a second order differential equation in y
koban [17]

\dfrac{\mathrm dy}{\mathrm dt}=-4x\implies x=-\dfrac14\dfrac{\mathrm dy}{\mathrm dt}\implies\dfrac{\mathrm dx}{\mathrm dt}=-\dfrac14\dfrac{\mathrm d^2y}{\mathrm dt^2}

Substituting this into the other ODE gives

-\dfrac14\dfrac{\mathrm d^2y}{\mathrm dt^2}=-4y\implies y''-16y=0

Since x(t)=-\dfrac14y'(t), it follows that x(0)=-\dfrac14y'(0)=4\implies y'(0)=-16. The ODE in y has characteristic equation

r^2-16=0

with roots r=\pm4, admitting the characteristic solution

y_c=C_1e^{4t}+C_2e^{-4t}

From the initial conditions we get

y(0)=5\implies 5=C_1+C_2

y'(0)=16\implies-16=4C_1-4C_2

\implies C_1=\dfrac12,C_2=\dfrac92

So we have

\boxed{y(t)=\dfrac12e^{4t}+\dfrac92e^{-4t}}

Take the derivative and multiply it by -1/4 to get the solution for x(t):

-\dfrac14y'(t)=\boxed{x(t)=-\dfrac12e^{4t}+\dfrac92e^{-4t}}

7 0
4 years ago
Help me on this question
olganol [36]

Answer:

  see below

Step-by-step explanation:

All of the given data sets have x-values that are sequential with a difference of 1. That makes it easy to determine the sort of sequence the y-values make.

  <u>first choice</u>: the y-values have a common difference of -2. This will be matched by a linear model.

 <u>second choice</u>: the y-values have a common difference of +2. Again, this will be matched by a linear model.

  <u>third choice</u>: the y-values have a common ratio of -2. This will be matched by an exponential model.

  <u>fourth choice</u>: the y-value differences are 3, 5, 7, increasing by a constant amount (2). This is characteristic of a sequence that has a quadratic model.

5 0
4 years ago
Terrance and Jesse are training for a long-distance race. Terrance trains at a rate of 6 miles every half hour, and Jesse trains
AnnyKZ [126]
I set up fractions based on quarter hours. I hope this helps.

8 0
3 years ago
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