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3 years ago

10

Pls help ASAP I DONT have time

2 answers:

irga5000 [103]3 years ago

7 0

Answer:

c

Step-by-step explanation:

I think its because 5x2=10 and then its three dollars times the amount of eggs he buys. Im not entirely sure though

larisa86 [58]3 years ago

3 0

Answer:

C

Step-by-step explanation:

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3 years ago

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3 years ago

Solve the system of equations.<br> 13x – 6y = 22<br> x = y + 6

GrogVix [38]

Answer:

$y=-8\\x=-2$

Step-by-step explanation:

$13x-6y=22\\x=y+6$

Replace x in the first equation.

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6 0

3 years ago

Read 2 more answers

Using calculus, you can find a function’s maximum or minimum by differentiating and setting the result to zero. Do this for equa

Elenna [48]

Answer:

$\dfrac{dx}{d\theta}=\dfrac{2v_0^2\cos2\theta}{g}$

$x=\dfrac{v_0^2}{g}$ at $\theta=45$

Step-by-step explanation:

$x=\dfrac{v_0^2\sin2\theta}{g}$

Differentiating with respect to $\theta$ means $v_0$ and $g$ are constants. So we differentiate only the $\sin2\theta$ term.

Assume $y=\sin2\theta$ .

Let $u=2\theta$ .

$\dfrac{du}{d\theta}=2$

Also, $y$ becomes

$y=\sin u$

$\dfrac{dy}{du}=\cos u$

By chain rule,

$\dfrac{dy}{d\theta}=\dfrac{dy}{du}\cdot \dfrac{du}{d\theta}$

$\dfrac{dy}{d\theta}=\cos u\cdot2=2\cos u=2\cos 2\theta$

Adding back the constants,

$\dfrac{dx}{d\theta} = \dfrac{2v_0^2\cos2\theta}{g}$

Equating this to 0,

$\dfrac{dx}{d\theta}=\dfrac{2v_0^2\cos2\theta}{g}=0$

$\cos2\theta=0$

$2\theta = \cos^{-1}0=90$

$\theta=45$

Using this value of $\theta$ in the expression for $x$ ,

$x=\dfrac{v_0^2\sin(2\times145)}{g}=\dfrac{v_0^2\sin90}{g}=\dfrac{v_0^2}{g}$ (since $\sin90=1$ )

7 0

4 years ago