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Alexus [3.1K]
3 years ago
12

Write an expression that is equivalent to the following x + x + x + - 20

Mathematics
2 answers:
ICE Princess25 [194]3 years ago
5 0
3x-20
Hope this helps
viva [34]3 years ago
3 0
I would say 3x-20 is another equivalent expression
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(b) Find all 3-tuples (a,b,c) satisfying
jolli1 [7]

We have a three unknown, 4 equation homogeneous system.  These always have at least (0,0,0) as a solution.  Let's write the equations, one column at a time.

1a + 0b + 0c = 0

-1a + 1b +0c = 0

0a - 1b + c = 0

0a + 0b + -1 c = 0

We could do row reduction but these are easy enough not to bother.

Equation 1 says

a = 0

Equation 4 says

c = 0

Substituting in the two remaining,

-1(0) + 1b + 0c = 0

b = 0

0(0) - 1b + 0 = 0

b = 0

The only 3-tuple satisfying the vector equation is (a,b,c)=(0,0,0)

4 0
3 years ago
A hot air balloon is at 14 feet above sea level, if you remove 7 sandbags, where
aleksley [76]

Answer:

21 feet above sea level.

Step-by-step explanation:

If you remove weight, a hot balloon goes up. 14+7(feet) = 21 feet above sea level.

7 0
3 years ago
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What is the value of (5)3?​
MissTica

Answer:

15

Step-by-step explanation:

This is simply just 5 x 3 = 15

3 0
2 years ago
What is the slope of a line that is perpendicular to a line whose equation is −2y = 3x + 7 ? Enter your answer in the box.
drek231 [11]
I was just on this .
8 0
3 years ago
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Solve for x: 4(x-2)+6=2(5x-6)
Katarina [22]

4(x - 2) + 6 = 2(5x - 6)     <em>use distributive property</em>

(4)(x) + (4)(-2) + 6 = (2)(5x) + (2)(-6)

4x - 8 + 6 = 10x - 12

4x - 2 = 10x - 12       <em>add 2 to both sides</em>

4x = 10x - 10       <em>subtract 10 from both sides</em>

-6x = -10      <em>divide both sides by (-6)</em>

x = 10/6

<h3>x = 5/3</h3>
8 0
3 years ago
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