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4 years ago

Can someone help with this?

Mathematics

1 answer:

Lana71 [14]4 years ago

7 0

Answer:

72.1 cm

Step-by-step explanation:

The arc length formula is s = rФ, where Ф is the central angle and is in radians (not degrees).

Here we convert 140° to radians: 140°(π/180°) = 2.44 radians.

Then the desired arc length is s = rФ = (29.5 cm)(2.44 radians) = 72.1 cm

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A jar contains 6 yellow marbles, 4 black marbles, and 2 purple marbles. Two marbles are picked at random, without replacement. W

ludmilkaskok [199]

Answer:

The probability of selecting both yellow is 5/22.

Step-by-step explanation:

Given the number of yellow marbles = 6

Black marbles = 4

Purple marble = 2

Now find the total number of marbles in the jar.

Thus total marbles = Yellow marbles + Black marbles + Purples marble

Now insert the values in the above formula.

Total marbles = 6 + 4 + 2

Total marbles = 12

The probability of 2 yellow marble:

$= \frac{6}{12} \times \frac{5}{11} \\= \frac{5}{22}$

Thus, the probability of selecting both yellow is 5/22.

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4 years ago

If –y + 2x^2 – x = -5y^3 then find dy / dx in terms of x and y.

vlada-n [284]

Answer:

dy/dx = $\frac{4x-1}{1-15y^{2} }$

Step-by-step explanation:

-y + 2x²- x = -5y³

2x² - x = y - 5y³

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8 0

3 years ago

Help me please i jave 10 min left HELP

yaroslaw [1]

Answer:

Option (A).

Step-by-step explanation:

$8\frac{4}{5}$ is a mixed fraction and can be written as,

$8\frac{4}{5}=8+\frac{4}{5}$ [Combination of a whole number and a fraction]

When we multiply this mixed fraction by 7,

$7\times 8\frac{4}{5}=7\times (8+\frac{4}{5})$

$=(7\times 8)+(7\times \frac{4}{5})$ [Distributive property → a(b + c) = a×b + a×c]

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$=56+5+\frac{3}{5}$

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$=61\frac{3}{5}$

Therefore, $7\times 8\frac{4}{5}=61\frac{3}{5}$ will be the answer.

Option (A) will be the correct option.

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3 years ago

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den301095 [7]

Answer:

He changed the elevation by 400 feet

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2 years ago

Jenna's class brought in 40 pieces of fruit for a celebration and 32 pieces of fruit were eaten. What percentage of the fruit wa

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Answer:

20%

Step-by-step explanation:

40 pieces total

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Percentage = (part / whole) x 100%

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4 0

3 years ago

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