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3 years ago

Help me on 7 And 8 ASAP

Mathematics

2 answers:

Semmy [17]3 years ago

7 0

Answer:7.)A

8.)C

Step-by-step explanation:

GREYUIT [131]3 years ago

3 0

Answer:

7. B. 100 miles in 3 hour

8. C. 875 miles in 9 hour

Step-by-step explanation:

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75 is 18 1/2 more than a number

Nutka1998 [239]

75 - 18.5 = 56.5
the number is 56 1/2 or 56.5

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3 years ago

Help me please ! This is hard

marishachu [46]

<u><em>*(The Answer)*=</em></u>

1. $-2.3$

2. $\frac{1}{3}$

3. $\sqrt{3}$

4. $\sqrt{7}$

5. $5.1$

So, it is B

Hope This Helps :)

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3 years ago

Find (f•f)(3) f(x) = x^2 - x

Reika [66]

A. 30 is correct answer

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4 years ago

Consider the force field and circle defined below.

grin007 [14]

By Green's theorem,

$\displaystyle\int_{x^2+y^2=9}\vec F(x,y)\cdot\mathrm d\vec r=\iint_D\left(\frac{\partial(xy)}{\partial x}-\frac{\partial(x^2)}{\partial y}\right)\,\mathrm dx\,\mathrm dy=\iint_Dy\,\mathrm dx\,\mathrm dy$

where $C$ is the circle $x^2+y^2=9$ and $D$ is the interior of $C$ , or the disk $x^2+y^2\le1$ .

Convert to polar coordinates, taking

$\begin{cases}x=r\cos\theta\\y=r\sin\theta\end{cases}\implies\mathrm dx\,\mathrm dy=r\,\mathrm dr\,\mathrm d\theta$

Then the work done by $\vec F$ on the particle is

$\displaystyle\iint_Dy\,\mathrm dx\,\mathrm dy=\int_0^{2\pi}\int_0^3(r\sin\theta)r\,\mathrm dr\,\mathrm d\theta=\left(\int_0^{2\pi}\sin\theta\,\mathrm d\theta\right)\left(\int_0^3r^2\,\mathrm dr\right)=\boxed0$

4 0

3 years ago

The graph represents the approximate number of bacteria in a population over time. Is the rate of change constant or varying? Ho

alisha [4.7K]

Answer:

Varying

Step-by-step explanation:

The reason why the rate of change is varying is because the dots on the graph do not connect to make a straight line when you draw a line through the dots. When the dots connect via a straight line, it is also known as a proportional relation. A straight line would be a constant change.

8 0

2 years ago