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Dovator [93]
2 years ago
9

Lan's age decreased by 7 is 18?

Mathematics
2 answers:
Cerrena [4.2K]2 years ago
7 0
His original age is 25
Dima020 [189]2 years ago
3 0
His age would be 25
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2x + y = 12<br> 4x - 3y = 2
7nadin3 [17]

Answer:

The value of x for equation is 3.4

The value of y for equation is 5.2  

Step-by-step explanation:

Given as :

The two linear equation are

2 x + y = 12           ........A

4 x - 3 y = 2              .........B

Now, Solving both equations , we get

3 × ( 2 x + y ) + (4 x - 3 y) = 3 × 12 - 2

Or, 6 x + 3 y + 4 x - 3 y = 36 - 2

Or, (6 x + 4 x) + (3 y - 3 y) = 34

Or, 10 x + 0 = 34

∴  x = \dfrac{34}{10}

i.e x = 3.4

So, The value of x for equation , x = 3.4

Put the value of x into eq A

∵ 2 x + y = 12

Or, y = 12 - 2 x

Or, y = 12 - 2 × 3.4

Or, y = 12 - 6.8

∴ y = 5.2

So, The value of y for equation , y = 5.2

Hence, The value of x for equation is 3.4  and The value of y for equation is  5.2   Answer

4 0
3 years ago
Only need 3.. pls help!!!
Natalka [10]

Answer: I’m not really sure what the correct answer is if you could help that would be great so let me know

Step-by-step explanation:

6 0
3 years ago
Simplified form of 11[(9^2-5^2)/2^2+8]<br> A.224.5<br> B.242<br> C.51.3<br> D.110
aleksandr82 [10.1K]
B. 242
th answer is b
7 0
3 years ago
Read 2 more answers
Solve for x<br>A:10 B:14.5 C:20 D:6÷3​
den301095 [7]

By applying Cathetus theorem, the value of x is equal to 10 units.

<h3>How to determine the value of x?</h3>

In order to determine the value of x, we would apply Cathetus theorem (leg rule), which states that each leg of a right-angled triangle is the geometric mean that's directly proportional between the hypotenuse and the part of the hypotenuse that's directly below the leg.

In this context, we have:

x² = m × a

x² = (21 + 4) × 4

x² = 25 × 4

x² = 100

x = √100

x = 10 units.

Read more on Cathetus theorem here: brainly.com/question/11357448

#SPJ1

7 0
1 year ago
A. x= 2 0
Elanso [62]

Answer:

Step-by-step explanation:

3 0
3 years ago
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