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Liono4ka [1.6K]
3 years ago
8

|-3+(-1)|= simplify the expression

Mathematics
2 answers:
podryga [215]3 years ago
7 0
The answer or simplified form is 4
ankoles [38]3 years ago
3 0
We need to calculate -3+(-1), and then |....| gives positive number.<span>
|-3+(-1)|= | - 4| = 4</span>
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Please simplify the answer!
frutty [35]

Answer:

y = 9

Step-by-step explanation:

Given

4 + \frac{y}{3} = 7

Isolate the term in y by subtracting 4 from both sides

\frac{y}{3} = 3 ( multiply both sides by 3 )

y = 3 × 3 = 9

7 0
3 years ago
The data given below contain the state cigarette tax​ (in $) for all 20 regions of a country.
g100num [7]

Answer:

(a) \bar x= 1.583 -- Population Mean

(b) s = 1.032 --- Population standard deviation

(c) See Explanation

Step-by-step explanation:

Given:

Cigarette tax for 20 regions

Solving (a): The population mean

This is calculated as:

\bar x = \frac{\sum x}{n}

\sum x = 1.36 + 1.70 + 2.50 + 0.45 + 1.18 + 0.64 + 3.46 + 0.57 + 2.00 + 0.80 + 1.60 +0.98 + 0.36 + 2.24 + 4.35 + 0.62 + 2.70 + 1.78 + 1.53 + 0.84

\sum x = 31.66

n = 20

So, we have:

\bar x= \frac{31.66}{20}

\bar x= 1.583

Solving (b): The population standard deviation

This is calculated as:

s = \sqrt{\frac{\sum( x - \bar x)^2}{n}

\sum (x -\bar x)^2 = (1.36 - 1.583)^2 + (1.70 - 1.583)^2+ (2.50 - 1.583)^2+ (0.45 - 1.583)^2+ (1.18 - 1.583)^2+ (0.64 - 1.583)^2+ (3.46 - 1.583)^2+ (0.57 - 1.583)^2+ (2.00 - 1.583)^2+ (0.80 - 1.583)^2+ (1.60 - 1.583)^2+(0.98 - 1.583)^2+ (0.36 - 1.583)^2+ (2.24 - 1.583)^2+ (4.35 - 1.583)^2+ (0.62 - 1.583)^2+ (2.70 - 1.583)^2+ (1.78 - 1.583)^2+ (1.53 - 1.583)^2+ (0.84- 1.583)^2

\sum (x -\bar x)^2 = 21.29222

So:

s = \sqrt{\frac{21.2922}{20}

s = \sqrt{1.06461}

s = 1.032

Solving (c):

Population mean tells the average amount while the standard deviation represents the spread from the calculated mean

Option (4) is correct

6 0
3 years ago
Help me plz...
cestrela7 [59]

The 3 inside angles of a triangle need to add up to 180 degrees.

You have two angles of 104 and 36.

A = 180 - 104 - 36 - 40

The answer is 40

4 0
3 years ago
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Ishaan is 72 years old and William is 4 years old. How many years will it take until Ishaan is only 5 times as old as William?
KiRa [710]
72+x=5(4+x) solve for x.
4 0
3 years ago
The value of a car decreases as shown in the table below.
kodGreya [7K]

Answer:

1,3,4

Step-by-step explanation:

aertyu

4 0
2 years ago
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