MATHEMATICS
MIDDLE SCHOOL

Answer: Its already an improper fraction.

If you mean mixed number it would be 7 4/7.

Hope this helps!:)

If you mean mixed number it would be 7 4/7.

Hope this helps!:)

Answer: The answer is is 7 4/7 because 7x7=49 and there is 4 left over to make the 4/7

COLLEGE

The advertising department of a nationally circulated magazine wishes to estimate the mean age of its subscribers within 0.5 year with 90% confidence. If they estimate that the standard deviation of the ages of their subscribers is about 5 years, what is the minimum size of the sample they must take: Group of answer choicesa. 17 b. 165 c. 45 d. 271 e. 13

Answer: Option 'd' is correct.

Step-by-step explanation:

Since we have given that

Margin of error = 0.5 years

Standard deviation = 5

At 90% confidence, z = 1.645

We need to find the minimum size of the sample they must take.

So,

Hence, Option 'd' is correct.

HIGH SCHOOL

John and his wife Catherine have gathered their family together for Christmas. They have two sons and each of their sons has two sisters. How many family members are there?

Given that John and his wife Catherine had two sons with each of the sons having two sisters makes up to 4 sisters. (i.e. the first son has two sisters and the second son has two sidters making up to four sisters). Therefore, John and his wife with their two sons together with their four sisters makes up to a total of 8 family members.Hope this helps. Let me know if you need additional help!

MIDDLE SCHOOL

A bottle of cranberry juice contains 32 fluid ounces and costs $2.56. What is the unit rate?

MIDDLE SCHOOL

The ratio of red marbles to blue marbles in Simran’s bag is equal to 1 to 1. If there are 20 red marbles, how many blue marbles are there?

If the ratio is 1:1, then there must be 20 red marbles and 20 blue marbles. If it weren't 1:1, then there would be a different amount of blue marbles. But since they are both 1:1, there has to be 20 red and 20 blue marbles.

~Silver

~Silver

HIGH SCHOOL

Solve for x : |4x + 12| = 16

The answer is... x = -7 or x = 1

HIGH SCHOOL

As a percentage, $22.00 is equal toof $40.00.

The percentage of $22 when $44 is 100% is 55% and it can be determine by using the unitary method.

Unitary method can be use to determine the percentage of $22. In unitary method there are two important values that is, single unit value and necessary value which has to be determine.

In unitary method, the value of single unit will be evaluated first and than by multiplying the value of single unit, necessary value can be determine.

So, if $40 is 100% than the percentage of $22 will be:

= 55%

For more information, refer the link given below:

brainly.com/question/21648365

40$-100%

22$-?%

22*100/40=55%

22$-?%

22*100/40=55%

HIGH SCHOOL

When adding or subtracting two fractions with denominators that are not equal, what is the first step you take? What would you do if you didn’t know what the values of the denominators were, such as when there are variables in the denominators? For example, what denominator would you use if you were adding 1/a and 1/b ? How would your new denominator affect the numerators?

Can you come up with denominators that contain variables and aren’t equal that would require you to change only one denominator? Explain.

For the first question, the first step to take when adding or subtracting two fractions with denominators that are not equal is to determine their least common denominator (LCD). This is the lowest number that is a multiple of both denominators.

For the second question, if only variables are given, you can simply multiply the two variables to obtain the LCD. However, take note that you should multiply the numerator and the denominator with the variable that would result to the same LCD for both terms. For example,

(1/a)*(b/b) + (1/b)(a/a) = (b/ab) + (a/ab) = (a + b)/ab

For the third question, yes you can come up with denominators that contain variables that aren’t equal as shown in the example above.
MIDDLE SCHOOL

HELP ME IN CIVICS 80 POINTS Which of the following conclusions can be supported by the information in this chart?

Voting Rates (in percent) by Educational Attainment and Age Groups: 2008

18 to 24 years

25 to 44 years

45 to 64 years

65 years and older

Less than high school

27.0

29.2

40.3

51.9

High school graduate

39.9

44.8

61.1

68.5

Some college or associate’s degree

56.6

63.8

74.3

79.1

Bachelor’s degree or more

70.2

76.7

81.1

82.0

Source: U.S. Census Bureau, Current Population Survey, November 2008

Participation in elections increases as education level increases across all age groups.

Education level was a significant factor in the outcome of the 2008 election.

Decreasing the drop-out rate among high school students will positively affect voting rates.

Increasing access to higher education will decrease citizens' participation in government

PLEASE HELP

Answer: A

Step-by-step explanation:

MIDDLE SCHOOL

Alexis paid $50 to active her cell phone plus a service fee of $20 per month.She used the phone for 3 months. How much has she paid for phone service

Answer:

She has paid $110.

Step-by-step explanation:

Step 1: Find out how much she pays in ONE MONTH.

$20 service fee × 3 months= $60

Dont forget about the activation fee (this fee should ONLY be counted ONE MONTH!!)

$60/3 months + $50 activation fee = $110