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2 years ago

Find the circumference and the area of a circle with radius 9 .

Mathematics

1 answer:

Eduardwww [97]2 years ago

6 0

C=2(pi)r use this equation with 9 in place of r

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11x-3=x-13 (solve for x)

omeli [17]

11x - 3 = x - 13
-x -x
10x - 3 = -13
+13 +13
10x = 10
---- -----
10 10
x = 1

8 0

3 years ago

T - 6.2 < 4 help me please

enyata [817]

Answer:

t < 10.2

Step-by-step explanation:

Step 1: Add 6.2 to both sides.

$t - 6.2 + 6.2 < 4 + 6.2$
$t < 10.2$

Therefore, the answer is t < 10.2.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

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2 years ago

What are the missing numbers in the data set? Assume the numbers are in order

prohojiy [21]

Answer:

This answer is 42

Step-by-step explanation:

42 - 24 = 18

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2 years ago

Given the relationship x2 + 3y2 =12, with y > 0 and dx, dt = 2 units/min., find the value of dy, dt at the instant y = 1 unit

matrenka [14]

$\bf x^2+3y^2=12\implies \stackrel{chain~rule}{2x\cfrac{dx}{dt}}+3 \stackrel{chain~rule}{\left(2y\cfrac{dy}{dt}\right)}=0
\\\\\\
2x\cfrac{dx}{dt}+6y\cfrac{dy}{dt}=0
\implies 
6y\cfrac{dy}{dt}=-2x\cfrac{dx}{dt}\implies \cfrac{dy}{dt}=\cfrac{-2x\frac{dx}{dt}}{
6y\frac{dy}{dt}}
\\\\\\
\boxed{\cfrac{dy}{dt}=-\cfrac{x\frac{dx}{dt}}{3y}}\\\\
-------------------------------$

$\bf \textit{now, when y = 1, what is \underline{x}?}\qquad x^2+3y^2=12\implies x^2+3(1)^2=12
\\\\\\
x^2=9\implies x=\sqrt{9}\implies x=3\\\\
-------------------------------\\\\
\begin{cases}
y=1\\
x=3\\
\frac{dx}{dt}=2
\end{cases}\implies \cfrac{dy}{dt}=-\cfrac{3\cdot 2}{3\cdot 1}\implies \cfrac{dy}{dt}=-2$

7 0

3 years ago

(Can Someone Help Answer This Problem) + No Links

Alex17521 [72]

Answer:

50 + 100n

Step-by-step explanation:

The cost is the cost of the visit plus the cost of the cavities

50 + 100n where n is the number of cavities

6 0

3 years ago

Read 2 more answers