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Umnica [9.8K]
3 years ago
12

Write an inequality and solve each problem.

Mathematics
1 answer:
astra-53 [7]3 years ago
5 0
For all of these, let n = the unknown number. 

25) "Five less than a number" becomes 5 - n 
"At least" tells you your number is greater than or equal to - 2.
Put it all together.

5 - n ≥ - 2
- n ≥ - 2 - 5
- n ≥ - 7
Divide by - 1 to isolate the variable. This flips the operation.

n ≤ 7

26) "The difference between a number and 6" tells you to do n - 6
"no more than" means this is a less than or equal to sign. 

n - 6 ≤ 5
n ≤ 5 + 6

n ≤ 11

27) "The sum of a number and 7" becomes n + 7
"more than" is a greater than sign

n + 7 > 1
n > 1 - 7

n > - 6

28) "The difference between a number and 10" becomes n - 10
Obvious one, "greater than" is... just that.

n - 10 > 9
n > 9 + 10

n > 19

29) "Four less than a number" is 4 - n
Another obvious one in "less than" 

4 - n < 11
- n < 11 - 4
- n < 7
Divide by - 1 on both sides to isolate the variable

n > - 7
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Can someone tell me how to list these numbers from least to greatest. -4, 6.2, 18 1/2, -5,9, 21, -1/4, and 1.75. Thanks
Fiesta28 [93]
I think it is -5,-4,-1/4, 1.75, 6.2, 9, 18 1/2, 21
4 0
2 years ago
Which of the following graphs is the inverse of f(x) = x2 + 4?
Eddi Din [679]

Answer:

Step-by-step explanation:

5 0
3 years ago
Class a had a mean score of 7.8 and a standard deviation of 1 class b had a mean score of 8.1 and a standard deviation of 0.2 wh
Karo-lina-s [1.5K]

Class 2 scored better on average

<h3>How to determine which class scored better on average?</h3>

The averages and the standard deviations are given as:

Class 1

Mean score = 7.8

Standard deviation = 1

Class 2

Mean score = 8.1

Standard deviation = 0.2

As a general rule, the smaller the standard deviation; the better the average

Class 2 has a smaller deviation

Hence, class 2 scored better on average

Read more about standard deviation at:

brainly.com/question/28061243

#SPJ1

6 0
1 year ago
The local bike shop charges a rental fee of 12$ as was as 4$ per hour to rent a bike if I spent 44$ write an equation to model t
vfiekz [6]

Answer:

8 hours

Step-by-step explanation:

rental fee = 12 + 4/hr

spent = 44

44 = 12+4(hr)

32 = 4(hr)

32/4 = hr

hr = 8

5 0
3 years ago
Find the area of this trapezoid. Area = _______ square units. Round to the nearest whole number.
fredd [130]

Answer:

119 square units

Step-by-step explanation:

To find the area of a trapezoid, use this formula: (a+b)/2 * h

Substitute 24, 10, and 7 for a, b, and h, respectively.

((24 + 10)/2) * 7

<em>Step 1: Add 24 and 10 to get 34.</em>

(34/2) * 7

<em>Step 2: Divide 34 by 2 to get 17.</em>

17 * 7

<em>Step 3: Multiply 17 by 7 to get 119</em>

119

The area of this trapezoid is 119 square units.

4 0
2 years ago
Read 2 more answers
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