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MissTica
3 years ago
6

What is 15m+12n+5m-3n

Mathematics
2 answers:
Serggg [28]3 years ago
7 0
20m-9m 
you have to combine like terms.
15 m goes with 5 m
and 12n goes with negative 3n
Anika [276]3 years ago
4 0
20m+9n you just have to add the 2 ms and minus 3n from 12n
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On a coordinate plane, 2 lines are shown. Line H J has points (negative 4, negative 2) and (0, 4). Line F G has points (negative
antoniya [11.8K]

Answer:

They are not perpendicular because their slopes are not negative reciprocals.

Step-by-step explanation:

Well first we need to find slope.

\frac{y^2-y^1}{x^2-x^1}

Line HJ)

(-4,-2) , (0,4)

y2 is 4 y1 is -2, so 4 - -2 = 6

0 - -4 = 4

6/4 -> 3/2

Due to the point (0,4) having no x value 4 is the y intercept.

Hence, y = 3/2x + 4 is the slope of line HJ

Line FG)

(-4,1) , (0,-2)

y2 is -2 y1 is 1, so -2 - 1 = -3

0- -4 = 4

Because (0,-2) is missing an x value -2 is the y intercept,

Equation: y = -3/4x - 2

They are not perpendicular because their slopes are not negative reciprocals.

7 0
3 years ago
Read 2 more answers
The rectangle below has a perimeter of 64 units. How long are the sides?
pantera1 [17]

Answer:

x=14

18 by 14

Step-by-step explanation:

64=18+x+x+2x-10

64=8+4x

56=4x

x=14

side 1 = 14

2(14)-10

28-10

18

side 2 = 18 (just to check if x is right)

8 0
4 years ago
△ABC is inscribed in a circle. Find the angle between the tangents to the circle at points B and C, if m∠CAB=50°.
Daniel [21]

DB,DC \:  are \:  tangents  \: to \:  (O) \:  at \:  B,C\\\Rightarrow DB\perp OB \:  at \:  B, DC\perp OC \:  at \:  C\Rightarrow \widehat{DBO}=\widehat{DCO}=90° \\ \widehat{BOC}=2\widehat{BAC}=2\times 50°=100°\\\widehat{BDC}=360°-\widehat{BOC}-\widehat{DBO}-\widehat{DCO}=360°-100°-90°-90°=80°

5 0
4 years ago
Read 2 more answers
I need help don’t know how to do
ivann1987 [24]
Let x be the unknown angle.
We know that x+50=120 because the value of an exterior angle of a triangle is equal to the sum of the other 2 interior angles.

x+50 = 120
Subtract both sides by 50
x = 70

The value of the unknown angle is 70 degrees.

Have an awesome day! :)
5 0
3 years ago
Read 2 more answers
ASAP NEED HELP PLEASE
Katen [24]

Answer:

B

line n has slope equal to zero

7 0
3 years ago
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