What is the meaning of PEMDAS

2 answers:

6 0

PEMDAS is the order of operations....it is the order u solve equations.
P = parenthesis....u solve what is in parenthesis first
E = exponents...u solve the exponents next
M = multiply , D = divide....starting from left and going right, u do all the multiplying and dividing
A = addition, S = subtraction...starting from left and going right, u do all the addition and subtraction

serg [7]3 years ago

4 0

PEMDAS is an acronym used to remember order of operations in a math equation. PEMDAS stands for Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction. It has also been put into the mnemonic Please excuse my dear aunt Sally.

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How do you add vectors? Add the vector 3,4 to the vector that goes 7 units at an angle of 2π/3.

Gekata [30.6K]

The sum of two vectors is (- 0.5, 10.1)

Explanation:

To add two vectors, add the corresponding components.

Let u =⟨u1,u2⟩ and v =⟨v1,v2⟩ be two vectors.

Then, the sum of u and v is the vector

u +v =⟨u1+v1, u2+v2⟩

(b)

Two vectors = ( 3, 4 )

angle 2π/3 = 120°

In x axis, the vector is = 7 cos 120°

$= 7 X -\frac{1}{2} \\\\= -3.5$

In y axis, the vector is = 7 sin 120°

= 7 X 0.866

= 6.062

The second vectors are ( -3.5, 6.062)

Sum of two vectors = [( 3 + (-3.5) ), (4 + 6.062)]

= (- 0.5, 10.1)

6 0

3 years ago

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AleksAgata [21]

we know that

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