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lianna [129]
3 years ago
13

On marys walk, she covered the 3 mile distance in one hour. However, the return trip took an hour and a half. What was her avera

ge speed?
Mathematics
2 answers:
Lana71 [14]3 years ago
6 0

Answer:

2.4 mph

Step-by-step explanation:

lesya [120]3 years ago
4 0

Answer:

Step-by-step explanation:

Speed = distance/time

Speed= 3/1= 3miles/hour

Return trip

Speed=3miles/1.5hour=2miles/hour

Average speed= initial + final trip= 2miles/hour+3miles/hour, then divide by 2

= 5/2=2.5miles/hour

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stiks02 [169]

Answer:

a) 0.3277

b) 0.0128

Step-by-step explanation:

We are given the following information in the question:

N(2750, 560).

Mean, μ = 2750

Standard Deviation, σ = 560

We are given that the distribution of distribution of birth weights is a bell shaped distribution that is a normal distribution.

Formula:

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

a) P (less than 2500 grams)

P(x < 2500)

P( x < 2500) = P( z < \displaystyle\frac{2500 - 2750}{560}) = P(z < -0.4464)

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P(x < 2500) = P(z < -0.4464) = 0.3277 = 32.77\%

b) P ((less than 1500 grams)

P(x < 1500)

P( x < 1500) = P( z < \displaystyle\frac{1500 - 2750}{560}) = P(z < -2.2321)

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

P(x < 1500) = P(z < -2.2321) = 0.0128 = 1.28\%

3 0
3 years ago
PLZZZZZZ NEED HELP!!!!!!!
tatyana61 [14]
The answer is (4,-3.4)
3 0
3 years ago
30 points please..I will report your answer if not right Thanks​
ella [17]
<h3>Answer:  SAS</h3>

=================================

How to get this answer:

We're told that AD = BC, so that is one pair of sides that are congruent. This forms the first "S" in "SAS"

The "A" refers to the congruent angles, which happen to be angle DAB and angle CBA, both are 90 degrees

The second "S" in "SAS" is the second pair of congruent sides. Those two sides are the overlapping shared side of AB. It might help to peel the two triangles apart to get a better look.

Note how the angles are between the two pairs of sides mentioned.

4 0
3 years ago
Which is bigger 6.5l or 645ml
snow_lady [41]

Answer:

pretty sure its 645ml

Step-by-step explanation:

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2 years ago
Using the expressions above, find the cost to the family of each company's phone plan if:
BabaBlast [244]

Answer:

company  B

Step-by-step explanation:

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3 years ago
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