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3 years ago

PLZ help I am so confused

Mathematics

1 answer:

Alik [6]3 years ago

6 0

Whenever it says divide just flip the fraction and change it to multiply

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Two rectangular sandwiches lie on a plate (the top view is shown). Can they be cut with just one straight cut into two equal par

Mila [183]

Answer: NO

Step-by-step explanation: The sandwiches are at different angles, so you would need two different cuts to make two equal parts each.

3 0

3 years ago

An art history professor assigns letter grades on a test according to the following scheme.A: Top 5% of scoresB: Scores below th

adoni [48]

Answer:

Grade B score:

$76 \leq x \leq 89$

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73.3

Standard Deviation, σ = 9.7

We are given that the distribution of score on test is a bell shaped distribution that is a normal distribution.

Formula:

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

B: Scores below the top 5% and above the bottom 62%

We have to find the value of x such that the probability is 0.62

$P( X > x) = P( z > \displaystyle\frac{x - 73.3}{9.7})=0.62$

$= 1 -P( z \leq \displaystyle\frac{x - 73.3}{9.7})=0.62$

$=P( z \leq \displaystyle\frac{x - 73.3}{9.7})=0.38$

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

$\displaystyle\frac{x - 73.3}{9.7} = 0.305\\\\x = 76.26$

We have to find the value of x such that the probability is 0.05

$P(X < 0.95) = \\\\P( X < x) = P( z < \displaystyle\frac{x - 73.3}{9.7})=0.95$

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

$\displaystyle\frac{x - 73.3}{9.7} = 1.645\\\\x = 89.26$

Thus, the numerical value of score to achieve grade B is

$76 \leq x \leq 89$

7 0

3 years ago

Please answer asap! show work!<br> 11. What is (f.g)(x)?<br> f(x) = x3 +3<br> g(x) = 2x2 + x - 1

Ksenya-84 [330]

Answer:

Step-by-step explanation:

Given :

f(x) = x³ + 3
g(x) = 2x² + x - 1

Finding (f × g)(x) :

f(x) × g(x)
(x³ + 3)(2x² + x - 1)
2x⁵ + 6x² + x⁴ + 3x - x³ - 3
<u>2x⁵ + x⁴ - x³ + 6x² + 3x - 3</u>

6 0

2 years ago

Parking at a university has become a problem. University administrators are interested in determining the average time it takes

Vikentia [17]

Answer:

<h2>In this particular case,the target population of interest to the university administration constitutes the university students.</h2>

Step-by-step explanation:

The university administration is interested to conduct a statistical study to identify the average or mean time taken by the students to find a vacant parking spot.
Therefore,the research topic here is the average time taken by the university students to find parking spot. The administrator collects an inconspicuous sample of 240 samples from the target population of the study,which is the overall student population of the university.
The sample collected by the university administration is used to observe the average or mean parking time by the university students.

6 0

3 years ago

What is a perimeter of a rectangle if one side is 6 in. and one is 8 in.?

ohaa [14]

Answer:

Step-by-step explanation:

6+6+8+8. Opposite sides of a rectangle are congruent

5 0

3 years ago

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