2 years ago

Solve the problem using the guess-and-check method.

Mathematics

1 answer:

ehidna [41]2 years ago

8 0

Answer is 14 lightbulbs

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Generate the first three terms of the following sequence 4n² - 2n + 3

Jet001 [13]

Answer:

=15

=33

Step-by-step explanation:

$n = 1 \\ 4 {n}^{2} - 2n + 3 \\ 4 \times 1 \times 1 - 2 \times 1 + 3 \\ 4 - 2 + 3 \\ 2 + 3 \\ = 5$

$n = 2 \\ 4 {n}^{2} - 2n + 3 \\ 4 \times 2 \times 2 - 2 \times 2 + 3 \\ 16 - 4 + 3 \\ 12 + 3 \\ = 15$

$n = 3 \\ 4 {n}^{2} - 2n + 3 \\ 4 \times 3 \times 3 - 2 \times 3 + 3 \\ 36 - 6 + 3 \\36 - 3 \\ = 33$

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2 years ago

You lean a 30 foot ladder against your house and it reaches exactly to the top. The ladder makes a 24 degree angle with the grou

zhenek [66]

A right triangle is formed with the ladder as the hypotenuse. Since the angle made by the ladder with with ground is given, we can use trigonometric functions to solve for the height of the house.

If we let x be the height of the house and using sine function:
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x = 30 sin 24
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Therefore, the house is 12.20 ft tall

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2 years ago

What is the value of this expression? 5/6 - (1/8•3/4)

givi [52]

Answer:

71/96 or 0.74

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2 years ago

Which graphs are proportional?

Komok [63]

Answer:

Its C because it passes through the origin. I learned about this.