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3 years ago

On a map drawn to scale, 2 cm represents 870 km. How long would a line segment be thats represents 130 kilometers?

Mathematics

1 answer:

lesya692 [45]3 years ago

6 0

Answer:

Step-by-step explanation:

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What is the area of a triangle with vertices (1,0) (5,0) (3,4)

Aleksandr-060686 [28]

Answer:

The area of the triangle is of 8 units of area.

Step-by-step explanation:

Answer:

The area of the triangle is of 21 units of area.

Step-by-step explanation:

The area of a triangle with three vertices $(x_1,y_1),(x_2,y_2),(x_3,y_3)$ is given by the determinant of the following matrix:

$A = \pm 0.5 \left|\begin{array}{ccc}x_1&y_1&1\\x_2&y_2&1\\1_3&y_3&1\end{array}\right|$

In this question:

Vertices (1,0) (5,0) (3,4). So

$A = \pm 0.5 \left|\begin{array}{ccc}1&0&1\\5&0&1\\3&4&1\end{array}\right|$

$A = \pm 0.5(1*0*1+0*1*3+1*5*4-1*0*3-0*5*1-1*1*4)$

$A = \pm 0.5*(20-4)$

$A = \pm 0.5*16 = 8$

The area of the triangle is of 8 units of area.

3 0

3 years ago

Answer fast please. I'll mark brainliest.

Kryger [21]

Answer:

the answer is d; the slope is 4, and the y-intercept is 12

Step-by-step explanation:

the slope is actually 4/-1, but the y-intercept is still 12 thow.

5 0

3 years ago

Solve −5x = 15. (1 point) −3 3 10 20

Luba_88 [7]

Remember you can do anything to an eqautoin as long as you do oit to both sides

-5x=15
try to get 1x by itself

remember
(ax)/a=x when a=a

so
-5x=15
get x
divide both sides by -5
remember to flip sign
(-5x)/(-5)=15/(-5)
x=-3

answer is first one
x=-3

8 0

3 years ago

Read 2 more answers

What is the common ratio for this geometric sequence?

juin [17]

Answer is c 3 because it is multiplied 3 everytime

4 0

3 years ago

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passes through A(-3, 0) and B(-6, 5). What is the equation of the line that passes through the origin and is parallel to ?

goblinko [34]

Answer: