All categories

3 years ago

Use the Law of Cosines to find y. Round to the nearest tenth.

Mathematics

1 answer:

Vinvika [58]3 years ago

5 0

Check the picture below.

Make sure your calculator is in Degree mode.

You might be interested in

What is the equation of the line that passes through the points (–12, –8) and (–17, –16)?

horsena [70]

Answer:

firstly find the gradient given by the equation

m=y2-y1/x2-x1

in this case x1 is -12,x2 is -17, y1 is -8 and y2 is-16

m=-16+8/-17+12

=-8/-5 or1.6

then use the equation

y-y1=m(x-x1)

y+8=1.6(x+12)

y+8=1.6x+19.2

y=1.6x+11.2

I hope this helps and sorry if it's wrong

4 0

3 years ago

The linear combination method gives a solution of (–4, 2) for which of these systems of linear equations?

Andrew [12]

Answer:

$3x + 13y = 14$

$6x + 11y = -2$

Step-by-step explanation:

See Attachment for complete question

To determine which of the options has (-4,2) as its solution; we have to test each linear combination until we arrive at an answer;

Given that

$(x,y) = (-4,2)$

Testing Option A

$3x + 13y = 14$

$6x + 11y = -2$

Substitute $x = -4$ and $y = 2$ in $3x + 13y = 14$

$3(-4) + 13(2) = 14$

Open Brackets

$-12 + 26 = 14$

$14 = 14$

Substitute $x = -4$ and $y = 2$ in $6x + 11y = -2$

$6(-4) + 11(2) = -2$

Open Brackets

$-24 + 22 = 2$

$2 = 2$

In both cases, the expression on the right hand side equates to that on the left hand side;

Hence, there's no need to check for other options.

8 0

4 years ago

<img src="https://tex.z-dn.net/?f=4x%20%2B%205y%20%3D%2019%20%5C%5C%20x%20%2B%205y%20%3D%2013" id="TexFormula1" title="4x + 5y =

FrozenT [24]

Subtract 5y from both sides of the equation
X=13-5y

4 0

3 years ago

Answer both 5 and 6 right thank you!

Ede4ka [16]

Answer:

Step-by-step explanation:

5.) slope is -1/3; y- intercept is -5

6.) slope is 5/2: 5mm of rain falls every 2 hours.

Please give me brainliest :)

4 0

4 years ago

If f(x)=x^2+3x-10, then f(10)=?

steposvetlana [31]

Answer:

f(10) = 120

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Function Notation

Step-by-step explanation:

Step 1: Define

f(x) = x² + 3x - 10

f(10) is x = 10

Step 2: Evaluate

Substitute: f(10) = 10² + 3(10) - 10
Exponents: f(10) = 100 + 3(10) - 10
Multiply: f(10) = 100 + 30 - 10
Add: f(10) = 130 - 10
Subtract: f(10) = 120

5 0

3 years ago