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ruslelena [56]
3 years ago
12

What expression is equivalent to 5 (x+6)-2x+9.

Mathematics
1 answer:
myrzilka [38]3 years ago
7 0
5x+30- 2x+9

3x+39 is the expression.
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Justin is 2 years older
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The sum of three numbers is 104. The first number is 10 less than the second. The third number is 4 times the second. What are t
Shalnov [3]

Answer:

The numbers are 9, 19 and 76.

Step-by-step explanation:

Let's take the second number and make it a variable, like x. Now let's find all the other numbers in terms of x.

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The second number in terms of x:

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If we add them all up, these 3 numbers in terms of x must be equal to 104, so:

x + (x - 10) + (4x) = 104 \\ x + x - 10 + 4x = 104 \\ 6x - 10 = 104 \\ 6x = 114 \\ x = 19

Now that we know the second number, we can find the other numbers since we already figured out their values in terms of x:

19 - 10 = 9

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6 0
3 years ago
For the right triangle shown, which expression represents the length of CA?
Nataly [62]

Answer:

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Step-by-step explanation:

The tangent function gives the ratio between the side opposite and the side adjacent to the angle. That is ...

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Multiplying by 5 solves the equation:

  ? = 5·tan(25°)

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