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andrezito [222]
2 years ago
12

In a bar graph, a 12 cm bar represents 96 kg. What will be the weight represented by a 5 cm bar? (A) 5 kg (B) 13 kg (C) 40 kg (D

) 60 kg​
Mathematics
1 answer:
Ket [755]2 years ago
5 0

Answer:

40Kg

Step-by-step explanation:

Rule of 3

12cm---------------96kg

5cm----------------?kg

multiply 5 by 96 and divided by 12

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X^2 - y^2 = 100
luda_lava [24]

Answer:

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Step-by-step explanation:

Let's start by rewriting the second equation in terms of "x":

x+y=5

Subtract y from both sides:

x=5-y

Now, substitute "5-y" for "x" in the first equation:

(5-y)^2-y^2=100

Note that:

(a-b)^2=a^2-2ab+b^2

25-10y+y^2-y^2=100

Cancel out like terms:

25-10y=100

Subtract 25 from both sides:

-10y=75

Divide both sides by -10

y=\frac{75}{-10}=\frac{15}{-2}=-\frac{15}{2}

Now, substitute this value back into either of the equations to solve for x.

x+y=5\\x-\frac{15}{2}=5\\

Add 15/2 to both sides:

x=5+\frac{15}{2}\\x=\frac{10}{2}+\frac{15}{2}\\x=\frac{25}{2}

Now, find the difference:

x-y=\frac{25}{2}-(-\frac{15}{2})=\frac{25}{2}+\frac{15}{2}=\frac{40}{2}=20

8 0
2 years ago
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Step-by-step explanation:

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