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3 years ago

Please answer all five please

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

5 0

Step-by-step explanation:

20+12+90+20

40+12+90

142

180-142

I think it is 38

But i don't understand is round to nearest angle tho sorry

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A rectangular dartboard has an area of 648 square centimeters. The triangular part of the dartboard has an area of 162 square ce

GaryK [48]

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3 years ago

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Using elimination method, simultaneously solve, 6x+2y=20 and 0.5x-0.5y=1

Aleksandr [31]

Answer:

x=3, y=1. (3, 1)

Step-by-step explanation:

6x+2y=20

0.5x-0.5y=1

-----------------

6x+2y=20

1/2x-1/2y=1

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6x+2y=20

2(1/2x-1/2y)=2(1)

------------------------

6x+2y=20

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-------------------

6x+2y=20

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6(y+2)+2y=20

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8 0

3 years ago

What is the value of x to the nearest tenth??

Stolb23 [73]

Answer:

$\displaystyle 12,3 ≈ x$

Step-by-step explanation:

We have to determine which trigonometric ratio to use, depending on what is displayed for us, and we will be using the cotangent [or tangent] ratio, this time with two angle measures:

$\displaystyle cot\:39° = \frac{x}{10} → 10cot\:39° ≈ 12,34897157 ≈ 12,3 \\ \\ tan\:39° = \frac{10}{x} → \frac{10}{tan\:39°} ≈ 12,34897157 ≈ 12,3 \\ \\ \\ OR \\ \\ \\ cot\:51° = \frac{10}{x} → \frac{10}{cot\:51°} ≈ 12,34897157 ≈ 12,3 \\ \\ tan\:51° = \frac{x}{10} → 10tan\:51° ≈ 12,34897157 ≈ 12,3$

Extended Information on Trigonometric Ratios

$\displaystyle \frac{OPPOSITE}{HYPOTENUSE} = sin\:θ \\ \frac{ADJACENT}{HYPOTENUSE} = cos\:θ \\ \frac{OPPOSITE}{ADJACENT} = tan\:θ \\ \frac{HYPOTENUSE}{ADJACENT} = sec\:θ \\ \frac{HYPOTENUSE}{OPPOSITE} = csc\:θ \\ \frac{ADJACENT}{OPPOSITE} = cot\:θ$