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4 years ago

Any people good at math that mind helping me?

Mathematics

2 answers:

Leya [2.2K]4 years ago

8 0

Plug the coordinate pairs into the equation. The first value is the x, and the second value is why. Solve the equation and if the answer on both sides is the same number, the coordinate pair satisfied the equation

Alexxandr [17]4 years ago

7 0

5x - 2y = -9
5(-1) -2(2) = -9
-5 - 4 = -9
-9 =- 9

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Which expressions are equivalent to 4(4x + 2y + x − y)? (1 point)

Citrus2011 [14]

=4(4x+2y+x-y)
=4*4x+4*2y+4*x-4*y
=16x+8y+4x-4y
=16x+4x+8y-4y
=20x+4y

donc la bonne reponse est la 3
4(5x+y)*
=4*5x+4*y
=20x+4y

5 0

3 years ago

How to find the sum of each interior angle of a 20gon?

saw5 [17]

formula for interior angles of a polygon is 180 times the number of sides minus 2

20 a 20gon has 20 sides, 20 -2 = 18, 180*18 = 3240

sum of interior angles = 3240 degrees

please mark brainliest

8 0

4 years ago

Fission tracks are trails found in uranium-bearing minerals, left by fragments released during fission events. An article report

Harlamova29_29 [7]

Answer:

Mean track length for this rock specimen is between 10.463 and 13.537

Step-by-step explanation:

99% confidence interval for the mean track length for rock specimen can be calculated using the formula:

M± $\frac{t*s}{\sqrt{N}}$ where

M is the average track length (12 μm) in the report
t is the two tailed t-score in 99% confidence interval (2.977)
s is the standard deviation of track lengths in the report (2 μm)
N is the total number of tracks (15)

putting these numbers in the formula, we get confidence interval in 99% confidence as:

12± $\frac{2.977*2}{\sqrt{15}}$ =12±1.537

Therefore, mean track length for this rock specimen is between 10.463 and 13.537

4 0

3 years ago

The perpendicular bisector of the line segment connecting the points (-3,8) and (-5,4) has an equation of the form y = mx + b. F

omeli [17]

Answer:

Step-by-step explanation:

find the slope

$\frac{4-8}{-5-(-3)} =\frac{-4}{-2} \\\\slope=2\\y=mx+b\\y=2x+b\\$

take a coordinate to fill in

$(-5,4)\\y=-5\\x=4\\-5=2(4)+b\\-5=8+b-8 -8\\-13=b\\$

this means that the equation is y=2x-13

and if you add m and b

you get :-11

<u><em>I HOPE THIS HELPS</em></u>

8 0

3 years ago

Read 2 more answers

wich is the biggest number in the world from 1.2.3.4.5.6.7.8.9 wich one of these numbers you think is bigger be careful ?

Alex_Xolod [135]

Answer: nine and if its a joke i have no clue

8 0

3 years ago