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3 years ago

PLZ HELP, WILL GIVE BRAINLIEST

Mathematics

1 answer:

guajiro [1.7K]3 years ago

6 0

Answer:

x = C, 35

Step-by-step explanation:

This involves two steps. First, you have to know that all the angles of a triangle add up to 180. So the first thing we do is find the angle of the whole red part. 180 - 73 - 51 = 56. Then, we have that one of the angles near it is 21 and the other angle is x. To find x, we do 51 - 21 = 35. Therefore, 35 = x.

Thanks for brainliest! :D

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3 years ago

Simplify the expression. -3(1+n)-6n

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Step-by-step explanation:

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3 years ago

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The parabola y=x^2 is shifted up by 8 units

dangina [55]

Answer:

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Step-by-step explanation:

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3 years ago

Keiko has seven colors of lanyard. She uses three different colors to make a keychain. How many different combinations can she c

AleksAgata [21]

Combination = doesn't matter what order
Permutation = order matters

There are <u>two</u> methods to work out combinations.

Method 1 List out possibilities
123 124 125 126 127 134 135 136 137 145 146 147 156 157 167
234 235 236 237 245 246 247 256 257 267
345 346 347 356 357 367
456 457 467
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For a total of 35 combinations.

Method 2 Use a formula.
It's a rather complicated one, so only use it if you have a lot of possibilities.

$\frac{n!}{r!(n-r)!} = \frac{7!}{3!(7-3)!} = \frac{7!}{3!*4!} = \frac{7*6*5*4*3*2*1}{3*2*1*4*3*2*1} = \frac{7*6*5}{3*2*1}=\frac{210}6=35$

(n is the number of choices, r is the amount you choose, and ! is a function that multiplies together all numbers down to 1)

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4 years ago

Please answer question now

nata0808 [166]

Answer:

469.42 ft²

Step-by-step explanation:

Law of sines;

w/sin27 = 38/sin40

w = sin27*38/sin40

w = 26.84 ft

Angle x;

∡X = 180 - 27- 40 = 113º

Area;

A = 0.5*(26.84)*(38)*sin(113)

A = 469.42 ft²

8 0

3 years ago