The order of arithmetic operations is given by the acronym PEMDAS, which means
Parentheses,
Exponents,
Multiplication,
Division,
Addition,
Subtraction.
These two examples illustrate how the use of parentheses can change the order.
Example 1:
5+7/3x4-2/5 has an answer of 13.933.
Use PEMDAS to obtain
5+(7/3)x4-(2/5)
= 5+(2.3333x4)-0.4
= 5+9.3333-0.4
= 14.3333-0.4
= 13.933
If we apply the parentheses: (5+7)/3x4-2/5
The result is
(12/3)x4-(2/5)
= (4x4)-0.4
= 16-0.4
= 15.06
which is a different answer.
Example 2:
8/3²x5+4 has the answer 8.444
Use PEMDAS to obtain
8/(3²)x5+4
= (8/9)x5+4
= (0.8889x5)+4
= 4.4444+4
= 8.4444
If we apply the parentheses (8/3)²x5+4:
The result is
2.6667²x5+4
= 7.1113x5+4
= 35.5565+4
= 39.5565
which is a different answer.
Answer:
35/100
Step-by-step explanation:
You have to find how many juniors there are, so if you add 13, 20, and 2 you get 35. For the denominator you have to find the total number of students, so just add all of the numbers together to get 100. So there is a 35/100 chance that a randomly selected student is a junior.
Answer:
2)105°
Step-by-step explanation:
In this parallelogram, J should be congruent to L (J=L). We can solve this problem if we find out the value of L.
The sum of the adjacent angle of the parallelogram will be equal to 180 degrees, so the equation is
L + M = 180
M=180- L
If L exceeds M by 30 degrees then the equation will be
L=M +30
If you combine both equations, it will be
L+30 = M +30
L+30 = (180- L) +30
L + L= 180 + 30
2L= 210
L=105
Answer:
578.3 ft²
Step-by-step explanation:
slope lengths are
L = √(11² + (13/2)²) = √163.25
A = (13 + 2√163.25)(15) = 578.307970...
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