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stiks02 [169]
3 years ago
9

The law of cosines can only be applied to right triangles ? True or false

Mathematics
2 answers:
Butoxors [25]3 years ago
8 0
Not necessarily. You can use it on not right triangles, but you would still have to, "imagine" a right triangle on it. (That's a sorta brief explanation)
LenaWriter [7]3 years ago
6 0
False it can work with non right angles triangles too
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I need help ASAP!! Please explain how to solve the question
lina2011 [118]

Answer:

318

Step-by-step explanation:

Let's divide this shape into 2 triangles & 3 rectangles.

Area of Triangle = 1/2 (bh)

(1/2 (9x6) ) x 2   = 54

Area of Rectangles = (9x11) + (8x11) + (7x11)

= 264

264 + 54 = 318km^2

Answered by g a u t h m a t h

8 0
3 years ago
The equation of a line given two points needs to be found. Samuel claims that slope-intercept form will generate the equation an
finlep [7]
Helena is correct in saying that the point-slope form will generate the equation. The point-slope form is written as:


y-y₁ = m(x-x₁), where,
m = (y₂-y₁)/(x₂-x₁) is the slope of the line
(x₁,y₁) and (x₂,y₂) are the coordinates of the two points


On the other hand, the slope-intercept form is written as:


y = mx + b, where,
m is the slope of the line
b is the y-intercept


In this case, since only two points were given, the y-intercept of the line is not readily known. Thus, it is only through the point-slope form that the equation of the line can be determined. This is because it only requires the substitution of the x and y-coordinates of the points in the equation. 
The equation of a line given two points needs to be found. Samuel claims that slope-intercept form will generate the equation and Helena claims that point-slope form will find the equation. Who is correct? Explain your reason by describing both forms.

4 0
3 years ago
Read 2 more answers
Ms. Shafner would like to tip her hairdresser 20%. If her haircut cost $38.00, how much should she give her as a tip? *
olganol [36]

Answer:

7.6

Step-by-step explanation:

3 0
3 years ago
Find the annual depreciation for a car bought for<br> $17,000 and sold for $12,500 two years later.
allochka39001 [22]

Answer:

4500

so, have a good day, and um, i think i got this right, if not sry.

4 0
3 years ago
Need help with this. Write an equation that is parallel to the line whose equation is y = −8x − 7?
shutvik [7]

Answer:

Problem 4: y = -8x+b

Problem 5: C: 3x-2

Step-by-step explanation:

<u>Problem 4:</u>

The given line is in slope intercept form.

The slope-intercept form is:

y = mx+b

Here the co-efficient of x is the slope of the line. Comparing the given equation with general form

m = -8

Two parallel lines have same slope so the slope of line will be -8.

y=mx+b\\y = -8x+b

b can be any positive or negative integer as we don't know any point on the line parallel to given line.

<u>Problem 5:</u>

Slope = 3

y-intercept = -2

Slope intercept of line is given by:

y = mx+b

here m is slope and b is y-intercept

Putting the values

y = 3x-2

Option C: y=3x-2 is the correct answer

Hence,

Problem 4: y = -8x+b

Problem 5: C: 3x-2

6 0
3 years ago
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