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katovenus [111]
3 years ago
7

Plz help i dont know the answer

Mathematics
1 answer:
Yuliya22 [10]3 years ago
4 0

Answer:

Im not 100 percent sure but I think you have to do this

Step-by-step explanation:

Add all numbers together to find total students

Then add the students in Chemistry and Physics and both together

Then find what that number is in percent to the total students

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Please answer this question. I’m giving brainliest. Both of them, please :)
Solnce55 [7]

Answer: where's the question

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
For each figure answer the following questions
Rudiy27

9514 1404 393

Answer:

  a) ∆ABC ~ ∆EDC by AA similarity

  b) ED/AB = 3/4

  c) 15 cm

Step-by-step explanation:

a) Two angles in each triangle are the same, so the AA similarity postulate can be used to declare the ∆ABC ~ ∆EDC. (Each triangle includes a right angle and angle C.)

__

b) Corresponding sides are ED/AB, DC/BC, EC/AC. The ratio of corresponding sides is ED/BC = (12 cm)/(16 cm) = 3/4.

__

c) Using the ratios identified above, we have ...

  DC/BC = 3/4 = x/(20 cm)

  x = 3/4(20 cm)

  x = 15 cm

8 0
3 years ago
An employee earns $175 for 15 hours work.<br> Find the constant of variation.
LiRa [457]

Answer:

11.67

Step-by-step explanation:

Given: Employee earn $175 for 15 hours

We know, the constant of variation means the rate of change.

To know The constant of variation, we need to find how much employee earn each hour.

∴ Constant of variation= \frac{Total\ earning}{Total\ working\ hours}

Constant of variation= \frac{175}{15}= 11.666

∴ Constant of variation= 11.67. (rounding off)

8 0
3 years ago
The following is a list of 5 measurements. 19,30,20,10,17 Suppose that these 5 measurements are respectively labeled.
Hunter-Best [27]

Answer:

For example, suppose we weigh five children. ... 5. ∑ i=1 xi. = x1 + x2 + x3 + x4 + x5. = 10 + 12 + 14 + 8 + 11. = 55. ... We also use sigma notation in the following way: 4 ... j2 = 12 + 22 + 32 + 42 = 30.

Missing: 17 ‎| Must include: 17Summary measures for this data set are ... 17 18. 19 20. Observedresult. 0. 1. 0. 1. 1. 0. 1. 0. 1. 1. Total so far. 4. 5. 5. 6 ... 5. 10. 15. 20. 25. 30. 35. 40 . Toss. Figure S2.1 Proportion P, 40 tosses of a coin.

5 0
3 years ago
Sunshine High School claims that 72% of its students complete their homework on a daily basis. Ms. Carter surveyed 80 students a
zimovet [89]

Answer:

Option A)

z equals 0.60 minus 0.72 all over the square root of the quantity 0.72 times 0.28 over 80

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 80

p = 72% = 0.72

\hat{p} = 60\5 = 0.60

Formula for z-statistic:

z = \dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

Putting the values, we get,

z = \displaystyle\frac{0.60-0.72}{\sqrt{\frac{0.72(1-0.72)}{80}}}\\\\z =\displaystyle\frac{0.60-0.72}{\sqrt{\frac{0.72(0.28)}{80}}} = -2.39

This, the correct answer is

Option A)

z equals 0.60 minus 0.72 all over the square root of the quantity 0.72 times 0.28 over 80

4 0
3 years ago
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