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noname [10]
3 years ago
10

A shape that is both a parallelogram and a trapezoid.

Mathematics
1 answer:
Snezhnost [94]3 years ago
6 0

A parallelogram is a quadrilateral (four sided shape) with two sets of parallel lines and a trapezoid is a quadrilateral with one pair of parallel lines. Since there are only 2 pairs of lines in a 4 sided shape, and since each pair can be only either parallel or not, a parallelogram cannot be a trapezoid as well.

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Millie has a bank account balance of $1200. Each week, her balance changes by
Hatshy [7]

Answer:

at least 8

Step-by-step explanation:

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2 years ago
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Harrison can purchase 4 dvds for $19.99 or 6 dvds for $22.50 which is the better deal?
adelina 88 [10]

$19.99 x 4 = $79.96

$22.50 x 6 = $135

$19.99 x 6 = $119.94

$22.50 x 4 = $90

The best answer to this choice is 4 dvds for $19.99. why?, because if it was 6 or 4 dvds for $19.99 the price would be more inexpensive then the price for $22.50, because if it was 22.50 x 4 or 6 dvds the price would be more expensive.  

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3 years ago
What is the difference of the two expressions shown below (3/4X+2)-(1/4x+5). Explain why
Nostrana [21]

Answer:

  • D. 1/2x - 3

Step-by-step explanation:

  • (3/4x + 2) - (1/4x + 5) =
  • 3/4x - 1/4x + 2 - 5 =
  • 2/4x - 3 =
  • 1/2x - 3

Correct choice is D

5 0
3 years ago
Heather was asked to graph 3x - y = -4 by using slope and y-intercept. Her graph is shown.
irakobra [83]
Hello! The y-intercept is (0, 4), because the line crosses 0 in the x-axis at that point. We can cross out C and D, because those don't show that. The slope is rise/run. You would go up 3, and go to the right once. If you need to, solve for slope by doing y2 - y1/ x2 - x1. Let's use the point (0, 4) and (1, 7) as an example. We would set it up like this: 7 - 4 / 1 - 0. Solving that would give us 3/1 or just simply three. The slope is positive 3 and the y-intercept is (0, 4). The answer is A.
7 0
3 years ago
Assume the general population gets an average of 7 hours of sleep per night. You randomly select 45 college students and survey
tekilochka [14]

Answer:

a) ii. This is a left-tailed test.

b) -1.59

c) -1.301

d) i. reject null hypothesis

e) Option i) The data supports the claim that college students get less sleep than the general population.

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 7 hours

Sample mean, \bar{x} = 6.87 hours

Sample size, n = 45

Alpha, α = 0.10

Sample standard deviation, s =  0.55 hours

First, we design the null and the alternate hypothesis

H_{0}: \mu = 7\text{ hours}\\H_A: \mu < 7\text{ hours}

a) We use one-tailed(left) t test to perform this hypothesis.

b) Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{6.87 - 7}{\frac{0.55}{\sqrt{45}} } =-1.59

c) Now,

t_{critical} \text{ at 0.10 level of significance, 44 degree of freedom } = -1.301

Since,                    

t_{stat} < t_{critical}

d) We fail to accept the null hypothesis and reject it.

We accept the alternate hypothesis and conclude that  mean number of hours of sleep for all college students is less than 7 hours.

e) Option i) The data supports the claim that college students get less sleep than the general population.

8 0
3 years ago
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