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Anna007 [38]
3 years ago
7

Alvin is 14 years older than elga's The sum of their ages is 94 what is elga'ss age

Mathematics
2 answers:
Sonja [21]3 years ago
8 0
Elga’s age is 40 and Alvin’s age is 54
shutvik [7]3 years ago
8 0

Answer:

Elga = 40

Step-by-step explanation:

Let's represent Alvin as A and Elga as E

Let's make equation

A = 14 + E

A + E = 94

Let substitute A

(14 + E) + E = 94

14 + 2E = 94

Subtract 14 from both sides: 2E = 80

Divide both sides by 2

E = 40

Elga is 40

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4 0
3 years ago
Зу+9=14
Anon25 [30]

Answer:

Constant(s) = 14,9

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Variable = y

6 0
3 years ago
What method would you choose to solve the equation 2x^2-7=9
Margaret [11]
Here is one way to solve for x.

Step 1)  2x^2-7=9

Step 2)  2x^2-7+7=9+7

Step 3)  2x^2=16

Step 4)  (2x^2)/2=16/2

Step 5)  x^2=8

Step 6)  sqrt(x^2)=sqrt(8)

Step 7)  |x|=sqrt(8)

Step 8)  x=sqrt(8) or x=-sqrt(8)

-------------------------------------

Below are explanations/reasons to each of the steps above.

Step 1) Original equation

Step 2) Add 7 to both sides

Step 3) Combine like terms

Step 4) Divide both sides by 2

Step 5) Simplify

Step 6) Apply the square root to both sides. The notation "sqrt" is shorthand for "square root"

Step 7) Use the rule that sqrt(x^2) = |x| for all real numbers x

Step 8) Use the rule that if |x| = k then x = k or x = -k for some fixed number k.

-------------------------------------

The two solutions are
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