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2 years ago

Help please, solve prob in the picture

Mathematics

2 answers:

JulsSmile [24]2 years ago

4 0

Answer: The Answer is D

I messed up heh. The person above me is right.

Stolb23 [73]2 years ago

3 0

Answer:

Step-by-step explanation:

Dividing a fraction is the same thing as multiplying the dividend by the reciprocal of the divisor.

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Which parabola will have a minimum value vertex? On a coordinate plane, a parabola opens down with x-intercepts at (negative 2.2

mart [117]

Answer:

(D)On a coordinate plane, a parabola opens up with x-intercepts at (negative 2, 0) and (2, 0), and a y-intercept at the vertex (0, negative 4).

Step-by-step explanation:

For a parabola $y=ax^2+bx+c$ to have a minimum vertex, it must open upward. (a>0).

In the given options, the parabola which opens upward is option D.

On a coordinate plane, a parabola opens up with x-intercepts at (negative 2, 0) and (2, 0), and a y-intercept at the vertex (0, negative 4).

Therefore, it has a minimum vertex with coordinates (0,-4).

6 0

3 years ago

. Let X and Y be random variables of possible percent returns (0%, 10%,

bazaltina [42]

(a) The marginal distribution of X is

Pr(X = x) = ∑ Pr(X = x, Y = y)

… = 0.0625 + 0.0625 + 0.0625 + 0.0625

… = 0.25

That is, the first equality follows from the law of total probability, with the sum taken over y from {0, 5, 10, 15}. Each probability Pr(X = x, Y = y) is given in the table to be 0.0625.

Similarly, the marginal distribution of Y is

Pr(Y = y) = 0.25

(b) Yes, they're independent because

Pr(X = x, Y = y) = 0.0625,

and

Pr(X = x) Pr(Y = y) = 0.25 • 0.25 = 0.0625.

E[X] = ∑ x Pr(X = x)

… = 0.25 ∑ x

… = 0.25 (0 + 5 + 10 + 15)

… = 7.5

and you would find the same mean for Y,

E[Y] = 7.5

The variance of X is

V[X] = E[X^2] - E[X]^2

… = (∑ x^2 Pr(X = x)) - 7.5^2

… = 0.25 (∑ x^2) - 56.25

… = 0.25 (0^2 + 5^2 + 10^2 + 15^2) - 56.25

… = 31.25

and similarly,

V[Y] = 31.25

(each sum is taken with x and y from {0, 5, 10, 15})

7 0

3 years ago

Find volume and round to the nearest 100 if necessary.

Ainat [17]

Answer:

1,795.5 m³

Step-by-step explanation:

Volume = base area × height

= [½(11+16)×9.5] × 14

1795.5 m³

7 0

3 years ago

(3n² p⁴) Idk how to solve it

tester [92]

me neither but this is what i got

3n² p⁴

4 0

3 years ago

An expression is shown below: f(x) = 2x2 − 3x − 5 Part A: What are the x-intercepts of the graph of f(x)? Show your work. (2 poi

skelet666 [1.2K]

Answer:

Step-by-step explanation:

I'm going to assume you meant 2x²-3x-5

8 0

2 years ago