All categories

3 years ago

What is the measurement of BC to the nearest centimeter?

Mathematics

1 answer:

77julia77 [94]3 years ago

7 0

Answer:

a 8

Step-by-step explanation:

You are given two sides and the included angle. Since you don't have any side and the opposite angle, you must use the law of cosines.

$a^2 = b^2 + c^2 - 2bc\cos A$

$a^2 = 5^2 + 11^2 - 2(5)(11)\cos 39^\circ$

$a^2 = 25 + 121 - 110\cos 39^\circ$

$a^2 = 60.51$

$a = 7.779$

Answer: a = 8 cm

You might be interested in

Need an answer thanks

artcher [175]

Answer:

Step-by-step explanation:

8 0

4 years ago

What is 4.86 divided by 0.2

babymother [125]

- - Lets solve:

$\frac{4.86}{0.2}$

$\frac{4.86}{ \frac{2}{10} }$

$4.86* \frac{10}{2}$

- - Solve for that to get answer:

24.3

Your final answer is 24.3

7 0

4 years ago

Read 2 more answers

Express 325 in simplest radical form.

Andreyy89

Do you mean the square root of 325?
If so:

First, break down the number
325 = 5 • 5 • 13

You have two fives, so you can put five on the outside, making your answer

5 sqrt{13}

8 0

3 years ago

Help me please !!!!!!!!!!!!!

Elina [12.6K]

Answer:

$\frac{25}{9}$

Step-by-step explanation:

To evaluate or simplify expressions with exponents, we use exponent rules.

1. An exponent is only a short cut for multiplication. It simplifies how we write the expression.

2. When we multiply terms with the same bases, we add exponents.

3. When we divide terms with the same bases, we subtract exponents.

4. When we have a base to the exponent of 0, it is 1.

5. A negative exponent creates a fraction.

6. When we raise an exponent to an exponent, we multiply exponents.

7. When we have exponents with parenthesis, we apply it to everything in the parenthesis.

We will use these rules to simplify. First we will substitute the values of a and k.

$(\frac{3^2a^{-2}}{3a^{-1}})^k =(\frac{3^25^{-2}}{3*5^{-1}})^{-2}=(\frac{3^25^1}{3*5^2})^{-2}=(\frac{3*5^2}{3^2*5^1})^{2}$

We simplified the negative exponents inside and outside the parenthesis. Remember a negative exponent switches its position in the numerator and denominator. We rewrote them with positive exponents.

Now apply the division rule for exponents for applying the exponent 2 outside the parenthesis.

$(\frac{3*5^2}{3^2*5^1})^{2}=(\frac{5}{3})^2$

Apply the exponent 2 and get $\frac{25}{9}$

3 0

4 years ago

prove that if f is a continuous and positive function on [0,1], there exists δ > 0 such that f(x) > δ for any x E [0,1] g

ValentinkaMS [17]

Answer:

I dont Know

Step-by-step explanation:

5 0

3 years ago