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EleoNora [17]
2 years ago
6

Please help me with this question

Mathematics
1 answer:
kotegsom [21]2 years ago
6 0

Answer:

24 and 20

Step-by-step explanation:

opposite sides are equal

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Which of these is an example of the Commutative property of addition? And Explain why? 3+5=4+4 or 3+5=5+3
arlik [135]

Answer:

3+5=5+3

Step-by-step explanation:

a+b=b+a

comunitive property

3 0
3 years ago
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Show work please :)
fgiga [73]

Answer:

60

Step-by-step explanation:

90/100 = 54

Cross multiplying:

100 * 54 / 90

5400/90

60

4 0
2 years ago
Tom had a total of $220 and he spent $35 on a basketball ticket . What percent of his money did he have left?
RoseWind [281]

Answer: 84.09%


Step-by-step explanation:

1. 220-30=? ?=185

2. Divide 185 by 220 (as a fraction, 185 out of 220 is 185/220 which also means divide) 185 divided by 220 is about 0.8409

3. Multiply 0.8409 by 100 (since there is two zeros in 100 we can move the decimal to the right twice which gets you 84.09



8 0
3 years ago
a nature clubs has 37 member.each member receives 15 fish to put aquarium . if 20 of total number of fish or put into a fish bow
PilotLPTM [1.2K]

Answer:

74

Just do 20x37=74

5 0
3 years ago
n=400 people under the age of 25 was asked whether they check social media sites right after they wake up. 42% check social medi
Aliun [14]

Answer:

Step-by-step explanation:

We would set up the hypothesis test.

For the null hypothesis,

p = 0.5

For the alternative hypothesis,

p < 0.5

Considering the population proportion, probability of success, p = 0.5

q = probability of failure = 1 - p

q = 1 - 0.5 = 0.5

Considering the sample,

P = 42/100 = 0.42

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

n = 400

z = (0.42 - 0.5)/√(0.5 × 0.5)/400 = - 3.2

Recall, population proportion, p = 0.5

We want the area to the left of 0.5 since the alternative hypothesis is lesser than 0.5. Therefore, from the normal distribution table, the probability of getting a proportion < 0.5 is 0.00069

So p value = 0.00069

Since alpha, 0.05 > than the p value, 0.00069, then we would reject the null hypothesis.

Therefore, there is significant evidence to conclude that that less than 50% of people under the age of 25 check social media sites right after they wake up.

7 0
3 years ago
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