2 years ago

7th grade math - sales tax (please help)

Mathematics

1 answer:

arlik [135]2 years ago

6 0

Answer: $6.67

Step-by-step explanation: Divide 18 by 2.7 which would be $6.67.

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Lines AD and BC are parallel. Find the measures

nlexa [21]

Answer:

45, 30, & 105

Step-by-step explanation:

<B=<D by alt. interior <s

180-150=30, so <C=30, <C=<A by alt interior <s

30+45=75

180-75=105

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2 years ago

I need help please !

xxTIMURxx [149]

Answer:

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Differential Equations Problem

fgiga [73]

Answer:

$y=\frac{t^2e^{2t}}{3}+ce^{2t}$

Step-by-step explanation:

We have given differential equation $\frac{dy}{dt}-2y=t^2e^{2t}$

We know that linear differential equation is given by $\frac{dy}{dt}+Py=Q$

On comparing with standard equation P = -2 and Q= $t^2e^{2t}$

Now integrating factor $IF=e^{-Pdt}$

$IF=e^{-2dt}=e^{-2t}$

Now solution of differential equation is given by

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$y\times e^{-2t}=\int\ e^{-2t}\times t^2e^{2t}\ dt$

$y\times e^{-2t}=\frac{t^2}{3}+c$

$y=\frac{t^2e^{2t}}{3}+ce^{2t}$

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3 years ago

Write the equation of the line that passes through the given points.

jasenka [17]

Answer:

is is test question and I will solve it for you

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3 years ago

11. |6- 15| - |5(-4)|= ? A.-29 B. -11 C. 1 D. 11 E. 29

Burka [1]

Answer:

Step-by-step explanation:

|6- 15| - |5(-4)| =

|-9| - |-20| =

(9)- (20) =

-11

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2 years ago