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nexus9112 [7]
2 years ago
10

Find BC to the nearest tenth. will give brainilist

Mathematics
1 answer:
horsena [70]2 years ago
4 0

Answer:

BC = 20.7

Explanation:

  • Formula used: a² = b² + c² - 2bc*cos(A)

<u>Using the formula</u>:  BC² = 15² + 13² - 2*15*13*cos(95)

                                BC² = 427.991

                                BC = √427.991

                                BC = 20.7 units

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Factor complete −2x2 + 10x.
mezya [45]

The factors of the quadratic equation is (x + 1) and (x - 6)

Given,

The quadratic equation; -2x² + 10x + 12

We have to find the factors of this equation using quadratic formula;-

Quadratic formula;- \frac{-b(+-)\sqrt{b^{2} -4ac} }{2a}

Here,

a = -2, b = 10 and c = 12

Now,

\frac{-b(+-)\sqrt{b^{2} -4ac} }{2a} = \frac{-10(+-)\sqrt{10^{2} -4 . -2. 12} }{2.-2} = \frac{-10(+-)\sqrt{100 +96} }{-4} = (-10±14) ÷ -4

Solve for,

- 10 + 14 / -4 = -4/4 = -1

That is, (x + 1)

Solve for,

- 10 - 14 / -4 = -24/-4 = 6

That is,  (x - 6)

Therefore, the factors for the given quadratic equation is (x + 1) and (x - 6)

Learn more about quadratic formula here;

brainly.com/question/9300679

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6 0
1 year ago
What is the value of the expression below?
Ghella [55]

Answer:

A. 12

Step-by-step explanation:

use pemdas

4^4=16

20+8=28

28-16=12

4 0
2 years ago
Read 2 more answers
Suppose a kite has two congruent angles of 100°. Of the remaining angles, one is four times larger than the other. What is the m
Pani-rosa [81]

Answer:

The measure of the largest angle in the kite is 128 degrees

Step-by-step explanation:

we know that

The sum of the interior angles in any quadrilateral must be equal to 360 degrees

A kite is a quadrilateral

Let

A,B,C and D the measure of the interior angles

so

A+B+C+D=360^o

we have that

A=B=100^o

substitute

100^o+100^o+C+D=360^o

C+D=160^o ----> equation A

Remember that

one is four times larger than the other

so

C=4D ----> equation B

substitute equation B in equation A

4D+D=160

solve for D

5D=160\\D=32^o

Find the measure of angle C

C=4(32)=128^o

therefore

The measure of the largest angle in the kite is 128 degrees

5 0
3 years ago
PLEASE HELP ME WITH THIS MATHS QUESTIONS!!!<br> WILL GIVE BRAINLIEST!!!
vampirchik [111]

Answer:

a) y = (x+2)/3

b) 5

Step-by-step explanation:

f^-1(x) means "f inverse of x". To find the inverse, we simply:

a ) f(x) = 3x -2

    y = 3x - 2 --> because f(x) is the same thing as y

    x = 3y - 2 --> to find the inverse, we simply just switch x and y

    x + 2 = 3y

    y = (x+2)/3

b) f^-1(13)

   f^-1(13) = [((13) + 2)/3]

   f^-1(13) = (15)/3

   f^-1(13) = 5

3 0
3 years ago
Question 4 options:
Arada [10]

Answer:

{ b, d, f }

Step-by-step explanation:

In the roster form we write the elements of a set by separating commas and enclose them within {} bracket.

We have give,

U = \{a, b, c, d, e, f, g\},

A = \{a, c, e, g\},

B = \{a, b, c, d\},

\because A' = U - A

\implies A' = \{a, b, c, d, e, f, g\} - \{a, c, e, g\}

= { b, d, f }

3 0
3 years ago
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