3 years ago

-6^2 + 5 * -6 - 1 = help please

Mathematics

1 answer:

IrinaVladis [17]3 years ago

3 0

Answer:

The answer is 5

Step-by-step explanation:

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loria has some dimes and quarters. If she has 18 coins worth a total of $2.25, how many of each type of coin does she have?

VashaNatasha [74]

Answer:

dimes: 5

quarters:8

Step-by-step explanation:

she has 2$ in quarters and $0.25 in dimes

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2 years ago

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Find a solution x = x(t) of the equation x′ + 2x = t2 + 4t + 7 in the form of a quadratic function of t, that is, of the form x(

Temka [501]

The particular quadratic solution to the ODE is found as follows:

$x=at^2+bt+c$
$x'=2at+b$

$(2at+b)+2(at^2+bt+c)=t^2+4t+7$
$2at^2+(2a+2b)t+(b+2c)=t^2+4t+7$

$\begin{cases}2a=1\\2(a+b)=4\\b+2c=7\end{cases}\implies a=\dfrac12,b=\dfrac32,c=\dfrac{11}4$

Note that there's also the fundamental solution to account for, which is obtained from the characteristic equation for the ODE:

$x'+2x=0\implies r+2=0\implies r=-2$

so that $x_c=Ce^{-2t}$ is a characteristic solution to the ODE, and the general solution would be

$x=Ce^{-2t}+\dfrac{t^2}2+\dfrac{3t}2+\dfrac{11}4$

4 0

4 years ago

PLEASE HELP 2x^2-8x+6=0

aalyn [17]

Answer:

x = 4 or x = -1

Step-by-step explanation:

2x^2 - 8x + 6 =0

divide by 2 we get : x^2 -4x +3 = 0

(x -4) (x+1)

x = 4 or x = -1

7 0

3 years ago

Just gotta get the last few done

vampirchik [111]

(x-6)^2 is the answer

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3 years ago

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when Apple sells their iPads they increase the price $225 from what it cost then to actually make the iPads one Apple Store sold

Karo-lina-s [1.5K]

Answer:

Read below.

Step-by-step explanation:

4000÷5=800

If it costs APPLE $4000 for those 10 iPads, then it will cost the consumers:

800+225=$1025

If it costs the CONSUMERS $4000 for the 10 iPads, then it costs Apple:

800-225=$575 for each iPad

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3 years ago