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BartSMP [9]
3 years ago
7

What is the area of a triangle with vertices at (−2, 1) , (2, 1) , and ​ (3, 4) ​ ?

Mathematics
2 answers:
Andru [333]3 years ago
5 0
Steps:

1. Let the three points be as follows:

A(-2,1), B(2,1), C(3,4)

2. Use the distance formula for points to find the lengths AB, BC, and AC. You will need to use the formula 3 times.

3. Use Heron's formula

A = sqrt{s(s-AB)(s-BC)(A-AC)}

Note s = (AB + BC + AC)/2

GET STARTED NOW.
Galina-37 [17]3 years ago
4 0
Check the picture below.

you can pretty much count the lengths off the grid.

recall that A = 1/2 bh.

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The hour hand of a clock moves −30° every hour. How many degrees does it move in 2&1/5 hours?
ad-work [718]

Answer:

ok is very easy

Step-by-step explanation:

so 1/5 of an hour is 12 mins

and 2 is 2 hrs so that 120 mins

now add 120+12=132

132 x -30 degrees

The answer to that is 132 x -30 =

-3960 sorry if its wrong and if you get a second try put -69.1150384 rad

I think sorry if you get it wrong have a good day  

6 0
3 years ago
Together, Kyle and Tyler traveled 425 miles to the beach. If Kyle traveled 240 miles, how far did Tyler travel? A) 2x = 425 B) x
Snezhnost [94]

Answer:

the answer is x=185

Step-by-step explanation:

x+240=425

 -240  -240

x= 185

3 0
4 years ago
Read 2 more answers
Find mMK................
Gnesinka [82]

Answer:

Approximately mMK is 53 degrees

Step-by-step explanation:

Here, we want to find the length of MK

As we can see, we have a right triangle at LNK

so

let us find the angle at L first

9 is adjacent to the angle at L and also, 15 is the hypotenuse of the angle at L

so the trigonometric identity that connects adjacent to the hypotenuse is the cosine

It is the ratio of the adjacent to the hypotenuse

So;

cos L = 9/15

L = arc cos (9/15)

L = 53.13 degree

Approximately, L = 53 degrees

so now, we want to get the arc length MK

We are to use the angle-arc relationship here

Using this; arc length MK is equal to the measure of L at the center which is 53 degrees

3 0
3 years ago
The points ( - 6,5) and ( - 7,q) fall on a line with a slope of 10. What is the value of q?
Usimov [2.4K]
If you go on my profile you will see a similar problem that I already answered today.

Lets start by using a formula (don't remember the name) 

(y-y1)=M(x-x1)

M is slope and y is first y value and y1 is second y value same applies to X.

Substitute in the values.

(5-q) = 10(-6-(-7))

5-q = 10*(1)

5-q = 10

-q = 5

q = -5

Check:

Substitute in the value of "q" and use the formula to find slope:

(y1-y)/(x1-x)

Substitute 

(-5-5)/(-7-(-6))
-10/-1
10

Your Answer: 
The value of "q" is -5
7 0
3 years ago
6
Nady [450]

Answer:

$200

y=25x+50

Step-by-step explanation:

y=25(6)+50

y=150+50

y=200

5 0
3 years ago
Read 2 more answers
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