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Vedmedyk [2.9K]
3 years ago
7

GRADE 7 HONORS ALGEBRA 1(so really grade 9)

Mathematics
1 answer:
vampirchik [111]3 years ago
3 0
Answer: 4.3 hope this helps
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What’s the fraction 2 over 8 plus 2 over 4?
Anuta_ua [19.1K]

Answer: 6/8 or simplified 3/4

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A number divided by 8 is 6<br>​
Shalnov [3]

Answer:

48

Step-by-step explanation:

8x6 = 48                         48/8=6

8 0
3 years ago
Read 2 more answers
Please help really fast :)​
olasank [31]

Answer:

Step-by-step explanation:

The two smaller angles add up to the measure of the total angle, so

(like a lot of geometry) it is really just an Algebra 1 problem with a nice picture to go with it --->  (5x + 13°) + (3x + 33°) = 70°

8x + 46° = 70°

8x = 24°

x = 3°

There is no actual question shown, but I imagine you want one or more of the following:

x = 3°

∠ABC = 3(3°) + 33° = 9°+ 33° = 42°

∠CBD = 5(3°) + 13° = 15° + 13° = 28°

Hope this helps.

4 0
3 years ago
A random sample of 60 mathematics majors spent an average of $200.00 for textbooks for a term, with a standard deviation of $22.
tangare [24]

Answer:

20 +/- $6.74

= ( $13.26, $26.74)

The 90% confidence interval for the difference in average amounts spent on textbooks (math majors - English majors) is ( $13.26, $26.74)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x1-x2 +/- margin of error

x1-x2 +/- z(√(r1^2/n1 + r2^2/n2)

Given that;

Mean x1 = $200

x2 = $180

Standard deviation r1 = $22.50

r2 = $18.30

Number of samples n1 = 60

n2 = 40

Confidence interval = 90%

z(at 90% confidence) = 1.645

Substituting the values we have;

$200-$180 +/-1.645(√(22.5^2/60 +18.3^2/40)

$20 +/- 6.744449847374

$20 +/- $6.74

= ( $13.26, $26.74)

The 90% confidence interval for the difference in average amounts spent on textbooks (math majors - English majors) is ( $13.26, $26.74)

3 0
3 years ago
Can anyone actually help and not just bs me, plsss and thank you!
Eva8 [605]

Using conversions between odds and probabilities, we have that:

1. A) 4:21

2. 0.952 probability that a bag of flour passes inspection.

3. C) 1:39

4. 41:59.

5. 14:11

  • A probability is the <u>number of desired outcomes divided by the number of total outcomes</u>.
  • An odd is given by a:b, in which <u>a is the number of successes and b is the number of failures</u>.

Item 1:

  • Probability of 0.16, thus, for 100 trials, <u>16 successes and 84 failures</u>, and the odd is:

16:84, which, simplifying by 4, is 4:21.

Item 2:

  • Odd of 20:1 means that 20 + 1 = <u>21 trials, there are 20 successes</u>, thus, the probability is:

p = \frac{20}{21} = 0.952

0.952 probability that a bag of flour passes inspection.

Item 3:

  • Probability of 0.025, thus, for 100 trials, <u>2.5 successes and 97.5 failures</u>, and the odd is:

2.5:97.5, which, simplifying by 2.5, is 1:39.

Item 4:

  • 59% probability that he will take the longest trail, thus 100 - 59 = 41% probability of him <u>not tanking the longest trail</u>, thus, the odds against him taking the longest trail is 41:59.

Item 5:

  • Probability of 0.56, thus, for 100 trials, <u>56 successes and 44 failures</u>, and the odd is:

56:44, which, simplifying by 4, is 14:11.

A similar problem is given at brainly.com/question/21094006

8 0
3 years ago
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