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Anton [14]
3 years ago
12

What is the answer to 2/5x = 5

Mathematics
2 answers:
Thepotemich [5.8K]3 years ago
6 0

Answer:

12.5 or 12 1/2

Step-by-step explanation:

cricket20 [7]3 years ago
5 0

Answer:

x= 12.5 or 12 1/2

Step-by-step explanation:

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The sum of two non-zero numbers a and b equals the sum of their reciprocals. If a+b≠0, what is the product of the two numbers?
Vadim26 [7]

Answer:

ab = 1

Step-by-step explanation:

A Reciprocal of a number is a number which when multiplied by the original number yields the multiplicative number, 1.

So the reciprocal of x would be x⁻¹ or ¹⁄ₓ

The information we are given states that the sum of the two non-zero numbers a and b equals the sum of their reciprocals.

So we can write this into an equation and solve,

(See image)

Once we solve, we get the equation (ab-1)(a+b) = 0

We are given info that a+b≠0

So for the above equation to be true, ab-1 has to equal 0

For <em>this</em> to be true, the product ab must equal 1

7 0
3 years ago
Mark as brainlest! Write an equation for each problem. Then solve. If necessary, round your answers to the nearest hundredth.
MatroZZZ [7]

Answer:

a.$138

b.$197

Step-by-step explanation:

(/=division)

a.415/30=138

b.138/7=197

Hope I helped :D

5 0
3 years ago
Read 2 more answers
If each side of a square grows 6 mm, the area of ​​the square is multiplied by 16. How long are the sides of the original square
Phoenix [80]

Answer:

2 mm

Step-by-step explanation:

Let x be the sides of the original square,

then the area of the original square is x^2

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Then (x + 6)^2 = 16*x^2

Take square root on both sides and get

x + 6 = 4x,

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so x = 2 mm

3 0
2 years ago
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olganol [36]
By the Pythagorean Theorem:

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L^2=400+225

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2 years ago
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Tpy6a [65]
Before going to B.two-digit addition
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3 years ago
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