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s2008m [1.1K]
3 years ago
12

Caculate and Show answer

Mathematics
2 answers:
creativ13 [48]3 years ago
5 0
(3 1/2 + 8 2/3) - 3 5/6

first find a common denominator 
(3 3/6 + 8 4/6) - 3 5/6 

then add 
11 8/6 - 3 5/6

the subtract
8 4/6

the simplify 
8 2/3 is your answer
morpeh [17]3 years ago
3 0
Well the answer is...6 1/3
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. In the past decades there have been intensive antismoking campaigns sponsored by both federal and private agencies. In one stu
Sergeeva-Olga [200]

Answer: B. H_0:p_1=p_2

H_a:p_1>p_2

Step-by-step explanation:

Let p_1 be the proportion of all U.S. adults that smoked in 1995. Let p_2 denote the proportion of all U.S. adults that smoked in 2000.

Objective for the study : Whether the proportion of U.S. adults that smoke declined during the 5-year period between the samples.

i.e. p_1>p_2

Alternative hypothesis(H_a) is the statement containing population  parameter that shows there is significant difference between the groups being tested.

⇒ H_a:p_1>p_2

Null hypothesis(H_0) is the statement containing population parameter that shows there is no significant difference between the groups being tested.

⇒ H_0:p_1=p_2

Hence, The hypotheses to test in this problem are

H_0:p_1=p_2

H_a:p_1>p_2

Hence, the correct answer is B. H_0:p_1=p_2

H_a:p_1>p_2

8 0
3 years ago
A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?.
natali 33 [55]

The train will pass a bridge in 40 seconds.

<h3>What is the distance?</h3>

Distance is defined as the product of speed and time.

Given that A train 360 m long is running at a speed of 45 km/hr.

Speed of train = 45 km/hr.

And it passes a bridge 140 m long.

Length of train = 360 meters

Since 1 km = 1000 meters.

and 1 hour = 3600 seconds

we have to determine the length of the train

So 1(km/hr.) = (1000/3600) = (26/72) meter/seconds

45 km/hr = 45 ×5/18 = 25/2 meter per second

So the speed of the train = 25/2 meters per second

Total distance to be covered = (360+140)m = 500m.

So time will it pass a bridge = distance/speed

Substitute the values of distance and speed in the above formula,

⇒ 500/(25/2)

⇒ 500×2/25

⇒ 40 seconds

Hence, the train will pass a bridge in 40 seconds.

Learn more about the distance here:

brainly.com/question/13269893

#SPJ4

8 0
2 years ago
Isabel got her haircut for $16. she left a 15% tip. what is the total amount of money isabel paided?
Gnom [1K]
$16x.15=$2.40
16+2.4=18.40 the answer is $18.40
Hopefully this is helpful.
8 0
3 years ago
A car has a maximum speed of 355.7 feet/second. Convert this speed to miles/hour.
Lynna [10]

Answer:

<h2><u><em>242.5226626 mph</em></u></h2>

Step-by-step explanation:

1 ft/s = 0.681818 mph

355.7 * 0.681818 = 242.5226626

355.7 ft/s = 242.5226626 mph

8 0
2 years ago
For the following geometric sequence find the explicit formula.<br> {12, -6, 3, ...}
vivado [14]
It's geometric sequence where a_1=12, q=-\dfrac{1}{2}

So a_n=12\cdot\left(-\dfrac{1}{2}\right)^{n-1}

7 0
3 years ago
Read 2 more answers
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