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dybincka [34]
3 years ago
14

Simplify this expression 3(3e+2f)+4f+2

Mathematics
1 answer:
Alexeev081 [22]3 years ago
8 0

Answer:

9e + 10f + 2

Step-by-step explanation:

9e+6f + 4f + 2

9e + 10f + 2

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The sides of a triangle have lengths of x, x + 5, and 25. If the longest side is 25, which of the following values of x would ma
Amiraneli [1.4K]
In a right angle, the sum of the squares of the two shorter sides is equal to the square of the longest side.
Here, the longest side is 25, the shorter sides are x and x+5.

x^2+(x+5)^2=25^2 \\
x^2+x^2+10x+25=625 \\
2x^2+10x+25=625 \ \ \ |-625 \\
2x^2+10x-600=0 \ \ \ |\div 2 \\
x^2+5x-300=0 \\
x^2+20x-15x-300=0 \\
x(x+20)-15(x+20)=0 \\
(x-15)(x+20)=0 \\
x-15=0 \ \lor \ x+20=0 \\
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The length of a side must be a positive number, so x=15.
The answer is C.
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A stamp has the Length of 1/2 cm and a width of 1 1/2 is the area of the stamps
avanturin [10]

Answer:

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Step-by-step explanation:

Given

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Required

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Area is calculated as follows

Area = Length * Width

Substitute values for Length and Width

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Hence, the area is

Area =  \frac{3}{4} cm^2

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