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soldier1979 [14.2K]
2 years ago
14

What are the solutions to 2(x+1^2)=18

Mathematics
1 answer:
stiks02 [169]2 years ago
3 0

Answer:

2( x + 1) = 18

2x + 2 = 18

2x = 16

x = 16/2 = 8

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A triangle has sides with lengths of 60 feet, 63 feet, and 87 feet. Is it a right triangle?
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Answer:

Yes

Step-by-step explanation:

We can use the Pythagorean Theorem to check if this triangle is a right triangle:

a^2+b^2=c^2

Note that a and b are the legs of the triangle and c is the hypotenuse:

Substitute the lengths of the sides into the equation:

60^2+63^2=87^2

3600+3969=7569\\7569=7569

Therefore this triangle is a right triangle.

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Out triangle-shaped pennants on the first day of school. If each pennant has a base of 5 inches and a height of 12 inches, what
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Answer:

Area of the penny = 30 square inches

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2 years ago
Given that 'n' is any natural numbers greater than or equal 2. Prove the following Inequality with Mathematical Induction
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\dfrac11 + \dfrac12 + \dfrac13 + \cdots + \dfrac1k > \dfrac{2k}{k+1}

We want to show if this is true, then the equality also holds for <em>n</em> = <em>k</em> + 1 ; that

\dfrac11 + \dfrac12 + \dfrac13 + \cdots + \dfrac1k + \dfrac1{k+1} > \dfrac{2(k+1)}{k+2}

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\dfrac11 + \dfrac12 + \dfrac13 + \cdots + \dfrac1k + \dfrac1{k+1} > \dfrac{2k}{k+1} + \dfrac1{k+1} = \dfrac{2k+1}{k+1}

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\dfrac{2k+1}{k+1}  > \dfrac{2k+2}{k+2}

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(2k+1)(k+2) > (2k+2)(k+1)

in turn because

2k^2 + 5k + 2 > 2k^2 + 4k + 2 \iff k > 0

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Haley's car gets at least 17 miles per gallon. If she plans a trip that is 250 miles, what is the minimum number of gallons she'
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1 * -1 = -1 which is not smaller than -1
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