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Jlenok [28]
3 years ago
7

How many terms are in the expression 4x + 9? *

Mathematics
1 answer:
max2010maxim [7]3 years ago
5 0
2 terms. (4x) and (9). Terms are separated by addition or subtraction but not multiplication or division
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Gina is a certain age (g). Gina's older sister is twice Gina's age. Gina's brother is half Gina's age. The sum of their ages is
aliina [53]

Answer:

Gina is 12 years old

Step-by-step explanation:

First,  we will have to write these statements mathematically and then solve.

Let Gina's age be x, let Gina's brother's age be y and let Gina's sister's age be z.

The second statement"Gina's older sister is twice Gina's age" can be mathematically written as: z =2 x ---------------------------(1)

The next statement "Gina's brother is half Gina's age" can be mathematically written as y = \frac{x}{2} ---------------------------------------(2)

Then the next statement "the sum of their ages is 42" can be mathematically written as: x + y + z = 42 ----------------------------(3)

We can now proceed to solve;

Substitute equation (1) and equation(2) into equation (3)

x + y + z = 42

x +  \frac{x}{2} + 2x = 42

Multiply through by 2

2x + x + 4x = 84

7x = 84

Divide both-side of the equation by 7

\frac{7x}{7} = \frac{84}{7}

x = 12

Therefore, Gina is 12 years old

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3 years ago
Describe three different substitutuion method
ankoles [38]

elimanation  variations matrix

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Vitek1552 [10]

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Step-by-step explanation:

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if a pitcher is full of lemonade. Which unit of liquid volume best describes the amount of lemonade in the pitcher? explain
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You wouldn't use, cm,m,km,kg,or anything like that.. you would use capacity.. (fancy word for liquid) So, for liquid you would use L, litres or gallons, or millilitres.
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I request assistance.
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Answer:

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Step-by-step explanation:

8 0
2 years ago
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