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shtirl [24]
3 years ago
9

−2y−8+4yminus, 2, y, minus, 8, plus, 4, y

Mathematics
2 answers:
Dovator [93]3 years ago
8 0

Answer:

A and B on Khan Academy are correct.

Step-by-step explanation:

lora16 [44]3 years ago
3 0

Answer:

a number 12

Step-by-step explanation:

duh bro

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Solve the equation using addition or subtraction<br> 22 + 15 = d - 17
agasfer [191]

Answer:

d=54

Step-by-step explanation:

22 + 15 = d - 17

37=d-17

54=d

d=54

3 0
3 years ago
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The equation shows the relationship between a planet’s orbital period, T, and the planet’s mean distance from the sun, A, in ast
Oxana [17]

Answer:

The equation shows the relationship between a planet’s orbital period, T, and the planet’s mean distance from the sun, A, in astronomical units, AU. If planet Y is twice the mean distance from the sun as planet X, by what factor is the orbital period increased?

Step-by-step explanation:

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3 years ago
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A fire department in a rural county reports that its response time to fires is approximatelyNormally distributed with a mean of
____ [38]

Answer:

Option C) 0.25

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 22 minutes

Standard Deviation, σ = 11.9 minutes

We are given that the distribution of  response time is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

P(response times is over 30 minutes)

P(x > 30)

P( x > 30) = P( z > \displaystyle\frac{30 - 22}{11.9}) = P(z > 0.6722)

= 1 - P(z \leq 0.6722)

Calculation the value from standard normal z table, we have,  

P(x > 30) = 1 - 0.749= 0.251 = 25.1\%

Thus, the correct answer is

Option C) 0.25

3 0
3 years ago
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What is the vertex of the quadratic function y=-(x-3)^2+4
cestrela7 [59]

Answer:

vertex = (3, 4 )

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

y = - (x - 3)² + 4 ← is in vertex form

with (h, k ) = (3, 4 ) ← vertex

5 0
3 years ago
Solve for n: 3 x n = 2 x 9<br> I need help
Nikolay [14]

Answer:

18

Step-by-step explanation:

CALCULATER

4 0
3 years ago
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