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soldier1979 [14.2K]
2 years ago
12

If x^2=a^2 , then {x} is (always/never/sometimes) equal to {a}Explain your reasoning.

Mathematics
1 answer:
Lelu [443]2 years ago
4 0

Answer:

always

Step-by-step explanation:

for the 2 sides to be equal then x must always be equal to a

given

x² = a² ( take square root of both sides )

\sqrt{x^2} = \sqrt{a^2} , that is

x = a

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Please help!! i’ll mark as brainlest, 20 points
Lisa [10]
It’s either b or c. One of those two is the answer for sure
3 0
3 years ago
Which expression is equivalent to x^4 • x^−2? <br> (A)x^−8 <br> (B)x^2 <br> (C)x^6 <br> (D)-8 • x
Juli2301 [7.4K]

Answer:

B

Step-by-step explanation:

Using the rule of exponents

a^{m} × a^{n} ⇔ a^{(m+n)}

Given

x^{4} × x^{-2} = x^{(4-2)} = x² → B

7 0
3 years ago
Read 2 more answers
the side length of a square can be expressed as 2x+3. If the area of the square is 121 square meters, what is the value of x?
lyudmila [28]

Answer:

x=4

Step-by-step explanation:

(2x+3)^2=121

2x+3=square root of 121

2x+3=11

2x=11-3

2x=8

x=4

(in a square all sides are equal therefore area =length ×width where length and width=2x+3)

6 0
3 years ago
[5y]^4 when y= 2 Evaluate the expression
Novay_Z [31]

Answer:

10000

Step-by-step explanation:

Well substitute it

(5*2)^4

now follow order of operations (Parenthesis, exponents, multipication-division left to right, etc.)

5*2=10

10^4=10000

so the answer would be

10000 if y is 2

5 0
3 years ago
Read 2 more answers
The triangle below has a total perimeter of 450 cm:
Korvikt [17]
Equation: 450 = 128 + 150 + n

work:

1st step:
128+150 = 278

2nd step:
450-278 = 172

answer: 172

3rd step (checking) :
450 = 128 + 150 + 172
450 = 278 + 172
450 = 450

3 0
3 years ago
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