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ExtremeBDS [4]
3 years ago
6

How do you know the correct order in which to evaluate algebraic expressions?

Mathematics
2 answers:
Lisa [10]3 years ago
6 0
To evaluate algebraic expressions there is no order. You just need to follow something called pemdas. The way to remember this is
 
p = please
e = excuse
m = my
d = dear
a= aunt
s = sally
 
So just remember Please excuse my dear aunt sally or pemdas.
   
P = parentheses (Apply from left tor right)
E = exponent (Apply from left tor right)
M = multiplication (Apply from left tor right)
D = division (Apply from left tor right)
A = addition (Apply from left tor right)
S = subtraction (Apply from left tor right)
 
Then solve!
 
Hope this helps!! xD
lys-0071 [83]3 years ago
3 0
In solving algebraic expressions, there is an order in which to solve it.

1) perform the operation inside the parenthesis first  
2) then perform the operation with the exponents
3) apply multiplication and division from left to right of the equation.
4) apply addition and subtraction from left to right of the equation.

Remember this: PEMDAS for easier recall. (parenthesis, exponents, multiplication, division, addition, subtraction)
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Step-by-step explanation:

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4 years ago
Two vertical poles of lengths 11 ft and 14 ft stand 16 ft apart. A cable reaches from the top of one pole to some point on the g
Alex17521 [72]

We are given

total length of cable is 30 feet

and this cable is on hypotenuse sides of the triangles

so, we can draw triangle as

Let's assume those hypotenuse as 'a' and 'b'

so, we will have

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now, we can find 'a' and 'b' from triangle

Smaller triangle:

a=\sqrt{x^2+11^2}

Larger triangle:

b=\sqrt{(16-x)^2+14^2}

we know that

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\sqrt{x^2+11^2}+\sqrt{(16-x)^2+14^2} =30

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1024x^2-78784x+1515361=3600x^2-115200x+1627200

now, we can use quadratic formula

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x=\frac{-\sqrt{36416^2-1152389056}+36416}{5152},\:x=\frac{\sqrt{36416^2-1152389056}+36416}{5152}

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so,

The point should be located 4.510 feet , 9.627 feet from the smaller pole to use 30 feet cable............Answer

6 0
3 years ago
HELP PLEASE!
navik [9.2K]
1. 
20= 2(x-4)
20/2= 2(x-4)/2
10= x-4
+4 .  +4
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3 0
3 years ago
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Step-by-step explanation:

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