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mojhsa [17]
3 years ago
9

Find S30 HELPP. 10 points! An arithmetic sequence has Si = -7 and S3 = 0.

Mathematics
2 answers:
Diano4ka-milaya [45]3 years ago
7 0

Answer:

6

Step-by-step explanation:

Cerrena [4.2K]3 years ago
7 0

Answer:2835

Step-by-step explanation:

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HELPPPPPPPPPPPPPPPPPP ASAP!!!!!!!!!!!!!!!!
azamat

Answer:

254.5 m^2

Step-by-step explanation:

Area of a Circle: A=\pi r^2

The r is the length of the radius of the circle

The radius of the shown circle is 9 m

A=\pi 9^2

A=81\pi=254.469004941

7 0
3 years ago
Read 2 more answers
Apply the distributive property to factor out the GCF.<br><br> 18d + 12= _________
stiv31 [10]

Answer:

6(3d+2)

Step-by-step explanation:

8 0
4 years ago
For a field trip 9 students rode in cars and the rest filled three busses. How many students were in each bus if 99 students wer
taurus [48]

Answer: 30 students per bus

Step-by-step explanation: 99-9=90

90/3=30

30 students per bus

8 0
4 years ago
Show that the line integral is independent of path by finding a function f such that ?f = f. c 2xe?ydx (2y ? x2e?ydy, c is any p
Juli2301 [7.4K]
I'm reading this as

\displaystyle\int_C2xe^{-y}\,\mathrm dx+(2y-x^2e^{-y})\,\mathrm dy

with \nabla f=(2xe^{-y},2y-x^2e^{-y}).

The value of the integral will be independent of the path if we can find a function f(x,y) that satisfies the gradient equation above.

You have

\begin{cases}\dfrac{\partial f}{\partial x}=2xe^{-y}\\\\\dfrac{\partial f}{\partial y}=2y-x^2e^{-y}\end{cases}

Integrate \dfrac{\partial f}{\partial x} with respect to x. You get

\displaystyle\int\dfrac{\partial f}{\partial x}\,\mathrm dx=\int2xe^{-y}\,\mathrm dx
f=x^2e^{-y}+g(y)

Differentiate with respect to y. You get

\dfrac{\partial f}{\partial y}=\dfrac{\partial}{\partial y}[x^2e^{-y}+g(y)]
2y-x^2e^{-y}=-x^2e^{-y}+g'(y)
2y=g'(y)

Integrate both sides with respect to y to arrive at

\displaystyle\int2y\,\mathrm dy=\int g'(y)\,\mathrm dy
y^2=g(y)+C
g(y)=y^2+C

So you have

f(x,y)=x^2e^{-y}+y^2+C

The gradient is continuous for all x,y, so the fundamental theorem of calculus applies, and so the value of the integral, regardless of the path taken, is

\displaystyle\int_C2xe^{-y}\,\mathrm dx+(2y-x^2e^{-y})\,\mathrm dy=f(4,1)-f(1,0)=\frac9e
8 0
3 years ago
Describe the transformation f(x) = 2x + 1 -&gt; g(x) = -8(x + 4) - 1
katrin2010 [14]

f(x) = 2x + 1; Paren graph = x;

The graph was shifted one unit up and stretched 2 times.

g(x) = -8(x+4) - 1 = -8x - 32 - 1 = -8x - 33

The graph was shifted 33 units down and stretched 8 times and flipped 180 degrees.

8 0
3 years ago
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