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disa [49]
3 years ago
8

What is the length of BC?please help!!!

Mathematics
1 answer:
Ivenika [448]3 years ago
4 0

Answer:

2.1

Step-by-step explanation:

using cosine theorem or substraction of two vector

b = AC = 5

c = AB = 6

a² = b² + c² - 2bc cos A

a² = 5² + 6² - 2*5*6 cos 20°

a² = 4.62

a = √4.62

a = 2.149

a ≈ 2.1

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Step-by-step explanation:

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Subtract 4/9 and 1/5 in the simplest form
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Step-by-step explanation:

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Let ff be the function that assigns to each student in the class her biological mother.
hoa [83]

Answer:

a) There cannot be sibling in the class.

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Step-by-step explanation:

The inverse of a function f is a function g that "reverses" f. In other words, if the function f is applied to an x and it gives a result of y, then applying the function g to y gives the result of x.  f(g(x)) = x.

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And Y refers to their biological mother.

If we want f to have an inverse, then each mother should be assigned to only one student.

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8 0
2 years ago
If f(x) = 2x + 3 for all values of x, what is the value of f(-3)?​
IrinaK [193]

Answer:

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Step-by-step explanation:

We are given the function:

f(x) = 2x+3

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Therefore, we can substitute -3 for each x in the function.

f(x)= 2x+3 at x= -3

f(-3)= 2(-3) +3

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition and Subtraction

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7 0
3 years ago
Find the fifth term in the geometric
OlgaM077 [116]

Answer:

<h2>          a₅ = 162</h2>

Step-by-step explanation:

The nth term in the geometric sequence:  a_n=a_1\cdt r^{n-1}

a₁ = 2  and  r = 3

So:

    a_5=a_1\cdot r^4=2\cdot3^4 = 2\cdot81=162

8 0
3 years ago
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