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Ivahew [28]
3 years ago
10

I neeeeeeddddd helppppppppppppppp

Mathematics
2 answers:
Aleks04 [339]3 years ago
8 0

Answer:

x = 4

Step-by-step explanation:

Cross multiply:

21*2 = 14(x - 1)

42 = 14x - 14

14x = 56

x = 4

PilotLPTM [1.2K]3 years ago
4 0

Answer:

42=14z-14

14z=56

z=4

Step-by-step explanation:

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Ax+ay+xa+ya <br> Differentiate
Dmitry_Shevchenko [17]

Answer:

2 a

Step-by-step explanation:

Possible derivation:

d/dx(2 a x + 2 a y)

Differentiate the sum term by term and factor out constants:

= 2 a (d/dx(x)) + d/dx(2 a y)

The derivative of x is 1:

= d/dx(2 a y) + 1 2 a

The derivative of 2 a y is zero:

= 2 a + 0

Simplify the expression:

Answer:  2 a

4 0
3 years ago
Which properties are used to prove that the expressions 5x+x-2 and 6x-2 are equivalent? 5x+x-2 (5+1)x-2 6x-2
sergeinik [125]

Answer:

Associative and Commutative properties

Step-by-step explanation:

7 0
3 years ago
The length of 2 sides of a triangle are 12 inches and 4 inches. Which is the third side?
Westkost [7]

Answer:

Let x = the third side

 

In a triangle, the sum of any 2 sides must be larger than the third side.

I believe this is called the triangle inequality theorem.

 

We can construct 3 inequalities to obtain the range of values for the third side.

 

  (Inequality #1)   12 + 4 > x

                                  16 > x

 

  (Inequality#2)    12 + x > 4

                                    x > -8   (we can discard this ... we know all sides will be positive)

 

  (Inequality #3)   4 + x > 12

                                   x > 8

 

So when we combine these together,  

 

   8 < x < 16

 

X (the third side) must be a number between 8 and 16. but not including 8 and 16

7 0
2 years ago
Please help if you want! :)
Korolek [52]

Answer:

3 dollars

Step-by-step explanation:

15 x .2

Because you convert the percentage to a decimal

3 0
2 years ago
Determine the missing side length:
musickatia [10]

Answer:

The missing side length is 3 units long.

Step-by-step explanation:

Use the Pythagorean Theorem where c²=a²+b²,

c=2√3, c²=12

a²=√3, a²=3

Solving for the missing side yields a side length of 3.

7 0
3 years ago
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