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3 years ago

Brainliest! 30 points!

Mathematics

1 answer:

Galina-37 [17]3 years ago

3 0

Answer:

the correct answer is c

Step-by-step explanation:

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Does someone know this ?

mart [117]

Answer:

m,n,p

Step-by-step explanation:

5 0

3 years ago

surveying crew located three points on a map that formed the vertices of a triangular area. A coordinate grid in which on unit e

Alecsey [184]

Answer:

5400 mi²

Step-by-step explanation:

The area is half the absolute value of the sum of the determinants of the points taken pairwise in some consistent order around the polygon. For a triangle, this sum of determinants can also be written as the determinant of a 3×3 matrix of the coordinates with the third column being 1.

... Area = (1/2)|D|

where D = ...

$\left|\begin{array}{ccc}0&-1&1\\-3&-9&1\\3&-2&1\end{array}\right|=\left|\begin{array}{cc}0&-1\\-3&-9\end{array}\right|+\left|\begin{array}{cc}-3&-9\\3&-2\end{array}\right|+\left|\begin{array}{cc}3&-2\\0&-1\end{array}\right|\\\\=-3+33-3=27$

Then the area is (in grid squares) ...

... Area = (1/2)|27| = 13.5 . . . . grid squares

Each grid square is (20 mi)² = 400 mi², so 13.5 grid squares is ...

... 13.5 × 400 mi² = 5400 mi²

4 0

2 years ago

Findx.<br> Assume the middle line is a midsegment in the problems below:<br><br> HELPPPPPP

Andre45 [30]

Answer: x = 12

midsegment is 16 units long

bottom side is 32 units long

===============================================

Work Shown:

The midsegment 2x-8 is parallel to the bottom side 2x+8

The bottom side is twice as long compared to the midsegment (since the midsegment is half the length of the bottom side).

We can say

bottom side = 2*(midsegment)

2x+8 = 2*(2x-8)

2x+8 = 4x-16

2x-4x = -16-8

-2x = -24

x = -24/(-2)

x = 12

--------------------

Extra info:

Now that we know x, we can find the length of those segments

midsegment = 2x-8 = 2*12-8 = 24-8 = 16

bottom side = 2x+8 = 2*12+8 = 24+8 = 32

Note the bottom side (32) is exactly twice as long compared to the midsegment (16). This confirms we have the correct x value.

4 0

2 years ago

Calculate the volume of a sphere that has a diameter of 7 meters.

kirill115 [55]

Answer:

1436.76

Step-by-step explanation:

use the formula 4piR^3 to solve

8 0

1 year ago

Read 2 more answers

Solve 3/10 n-3 1/5 = -1 1/5

steposvetlana [31]

3/10 n-3 1/5=-1 1/5
convert mixed numbers to a improper fractions:3 1/5=16/5
$\frac{3}{10}n- \frac{16}{5}=-1* \frac{1}{5}$
convert mixed numbers to a improper fractions:1 1/5=6/5
$\frac{3}{10}n- \frac{16}{5}=- \frac{6}{5}$
add 16/5 to both sides
$\frac{3}{10}- \frac{16}{5}+ \frac{16}{5}=- \frac{6}{5}+ \frac{16}{5}$
simplify
3/10 n=2
multiply both sides by 10
$10* \frac{3}{10}n=2*10$
simplify
3n=20
divide both sides by 3
$\frac{3n}{5}= \frac{20}{3}$
simplify
$n= \frac{20}{3}$
Hope this helps

5 0

3 years ago