Plz do this for me plz and thx will give Brainly

Mathematics

1 answer:

Stels [109]3 years ago

3 0

Probably C. 30 Hope this helps I might wrong sometimes

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Law of sines?? side c=22 side a=16 side b= 21 solve for angle c??? help

den301095 [7]

Answer:

Angle C measures: $71.52^o$

Step-by-step explanation:

When you know the length of the three sides of the triangle and not a single angle, the law of sines is of no use. You need to use the law of cosines. In your case, since you want to find angle "C", you use the following;

$c^2=a^2+b^2-2\,a\,b\,cos(C)\\2\,a\,b\,cos(C)=a^2+b^2-c^2\\cos(C)=\frac{a^2+b^2-c^2}{2\,a\,b} \\cos(C)=\frac{16^2+21^2-22^2}{2\,(16)\,(21)}\\cos(C)=0.3169643\\C=arccos(0.3169643)\\C=71.52^o$

4 0

4 years ago

Use the function to evaluate the indicated expressions and simplify.

Musya8 [376]

9514 1404 393

Answer:

f(x²) = x² +5
(f(x))² = x² +10x +25

Step-by-step explanation:

Put the argument in place of x and evaluate the desired expression.

1. f(x²) = x² + 5 . . . . . . straight substitution for x

2. (f(x))² = (x +5)²

= (x +5)(x +5) = x(x +5) +5(x +5) = x² +5x +5x +25

(f(x))² = x² +10x +25

6 0

3 years ago

When a student sold an Xbox on eBay for $145, she was charged a two-part final value fee: 5.25% of the first $25 of the selling

Contact [7]

Selling Price = $145

Charge on first $25 is 5.25%
5.25% of $25 = $\frac{5.25}{100}*25= \frac{5.25}{4} = 1.3125$

Charge on rest is 3.25%
rest amount = $145 - $25 = $120
3.25% of $120 = $\frac{3.25}{100}*120=3.9$

$Total\ charge=1.3125+3.9=5.2125 =\boxed{5.21}$

6 0

4 years ago

What is the perimeter of the triangle?

Mumz [18]

the answer to this question is 55 cm

3 0

3 years ago

Read 2 more answers

Distributive property 79x36

IrinaVladis [17]

Answer:

1(79 x 36)