2x +3y =12 Dan 3x-1y=7

Answers

Answer 1

Answer: 2x+3y=12
3x-y=7

use subsituttion
make one of the equations equal to a placeholder
3x-y=7
subtract 7
3x-7-y=0
add y
3x-7=y
subsisute 3x-7 for y in first equation

2x+3(3x-7)=12
2x+9x-21=12
11x-21=12
add 21 to both sides
11x=33
divide both sides by 11
x=3

subsitute x for 3 in any equation
3x-7=y
3(3)-7=y
9-7=
2=y

x=3
y=2

Answer 2

Answer: 2x+3y=12
3y=-2x+12
y=-2x/3+4

3x-1y=7
-1y=-3x+7
y=3x-7

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How to set up 701 km -523 km 445 m

Answers

answer: 177.555km
convert 445m into 0.445km
and so it's 701-523.445=177.555km

Convert - 445m into 0.445km
So it's 701-523.445 = 177.555km

Hope I Helped!!! :-)

Have A Good Day!!!

Simplify (-2xy2)4(2x3y4)2

Answers

$(-2xy^2)^4(2x^3y^4)^2=\n \n (16x^4y^8)(4x^6y^8)=64x^(10)y^(16)$

An airplane traveling at 13,000 feet makes a climb of 5000 feet followed by a descent of 3,000 feet. represent the planes final altitude as a sum of positive and negative integers.

Answers

Answer:

13,00 + 5,000 - 3,000= 15,000

2% of 96 (I need the work shown)

Answers

2% divided by 100 = 0.02
0.02
X 96
-------------
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---------------
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Ho much lines of symmetry does a circle have?

Answers

infinity
if you draw a point in the center of the circle, you can draw infinite line throught the point and get a line of symetry every time
(it is true that ther are 360 degrees, but degrees can be divided into decimals like 45.34503503495 degrees is different from 45.34503503494)

Tony has a bucket filled with 10 green, 3 blue, 1 red, and 7 yellow tennis balls. Heremoves 9 tennis balls from the bucket, without replacement.
Which of the following outcomes could represent the tennis balls that he selects? (
MULTISELECT)
A. All of the tennis balls are blue.
B. There is 1 tennis ball of each color.
C. There are 3 green tennis balls.
D. There are more red tennis balls removed than other colors.
E. The number of red tennis balls is the same as the number of blue tennis balls.
help

Answers

The answer i got was........ E. The number of red tennis balls is the same as the number of blue tennis balls.

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