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gizmo_the_mogwai [7]
3 years ago
11

Help pls on this worksheet

Mathematics
2 answers:
salantis [7]3 years ago
8 0

3/10

1/10

-10/3

-10

Savatey [412]3 years ago
6 0
1. 3/10
2. 1/10
3. -10/3
4. -10
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Which of the following is a a solution to the equation y=3x-1
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For option a, y = 3(4) - 1 = 12 - 1 = 11                  [not correct]
For option b, y = 3(2) - 1 = 6 - 1 = 5                      [correct]

Therefore option b is a solution to the given equation.
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Rachel has a toy shaped like a triangular pyramid in which the base and the lateral faces are congruent equilateral triangles. T
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The lateral area that Rachel needs to cover is 21 inches.
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In 2004 there were 7,000000 people living alone in great Britain this is four time as many as in 1961, Calculate how many people
amid [387]

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1.75 × 10⁶

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3 years ago
If she is right, the object is worth $25, if she is wrong, the object is worth $4. How high does the probability of the object b
pickupchik [31]

Answer:

The expected value for an event with outcomes:

{x₁, x₂, ..., xₙ}

Each one with probability:

{p₁, p₂, ..., pₙ}

Is just:

Ev = x₁*p₁ + ... + xₙ*pₙ

here we have two outcomes:

x₁ = the object worths $25

x₂ = the object is worth $4.

Each one with probability p₁ and p₂ respectively, such that:

p₁ + p₂ = 1

Then the expected value is:

Ev = p₁*($25) + p₂*($4)

Now we want to know how should be the probabilities, such that buying the object for $16 is whort.

Well, the purchase will be whort if the expected value is larger than $16.

This is equivalent to:

p₁*($25) + p₂*($4) - $16 > $0

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p₁ + p₂ = 1

we can rewrite:

p₂ = 1 - p₁

replacing that in the above inequality we get:

p₁*($25) + ( 1 - p₁)*($4) - $16 > $0

Now we can solve this for p₁

p₁*($25 - $4) + $4 - $16 > $0

p₁*$21 - $12 > $0

p₁*$21 > $12

p₁ > $12/$21 = 0.571

The probability of the object being authentic should be larger than  0.571 to take the gamble.

5 0
3 years ago
A right triangle has legs measuring 18 in. and 26 in.
creativ13 [48]
Do sqrt(18^2)+26^2)). It should give you the answer.

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3 years ago
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