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Serhud [2]
3 years ago
9

Give an example to show that subtraction does not follow the associative rule

Mathematics
1 answer:
Agata [3.3K]3 years ago
4 0

(6 - 2) - 1 = 4 - 1 = 3

6 - (2 - 1) = 6 - 1 = 5

The associative rule doesn't work for subtraction because you get different results when you move the parentheses.

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Help me with this please!
DedPeter [7]

Answer:

Area of triangle = 20√2

Step-by-step explanation:

Formula:

Area of triangle = bh/2

b - base  of triangle

h - height of triangle

<u>Distance formula</u>

d = √(x₂ - x₁)² +(y₂ - y₁)²

From the figure we can see that, the given triangle is right angled triangle.

Base = AC and Height = AB

<u>To find AB and AC</u>

A(1,3), B(4,7) and C(9, -5)

AB =  √(4 - 1)² +(7 - 3)² =  √(3² + 4²) = 5

AC = √(9 - 1)² +(-5 - 3)² =  √(8² + -8²) = 8√2

<u>To find the are of triangle</u>

Area = bh/2 = (5* 8√2)/2 = 20√2

Therefore the area of triangle = 20√2 square units

8 0
3 years ago
Read 2 more answers
After a 15% off sale,some jeans were $11.50.How much were the jeans before the sale?
Nookie1986 [14]
$13.53 is the answer to you problem
3 0
3 years ago
B. If 3x - 3 and 5x + 7° are the angle of a linear pair, find their measurement the angle<br>​
ankoles [38]

Answer:

x = 22°

the angles are: 63° and 117°

Step-by-step explanation:

a linear pair of angles total together to be 180°

so:

3x - 3 + 5x + 7 = 180

combune like terms:

8x = 176

divide both sides of the equation by 8:

x = 22°

the angles are: 63° and 117°

7 0
2 years ago
BRAINLIEST!!!!!!!!!!!!!
qwelly [4]
6/8

This is because tan is opposite over adjacent

6 is opp of A, and 8 is adjacent A
8 0
2 years ago
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Which is a composite number A. 81 B. 41 C. 61 D. 71
UNO [17]
A,81 because if you try checking 81 will be the only composite number im in 6 grade.....

6 0
3 years ago
Read 2 more answers
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