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denis-greek [22]
4 years ago
12

The sum of two numbers is 48. Their difference is 38. Find the numbers.

Mathematics
2 answers:
Setler79 [48]4 years ago
4 0

Answer:

43 and 5

Step-by-step explanation:

Let's let the two unknown numbers be a and b.

Their sum is 48, therefore:

a+b=48

And their difference is 38. In other words:

a-b=38

We now have a system of equations. To solve, we can use substitution. First, add b to both sides in the second equation:

a=38+b

Substitute this into the first equation:

(38+b)+b=48

Combine like terms:

2b+38=48

Subtract 38 from both sides:

2b=10

Divide both sides by 2:

b=5

So, one of the numbers is 5.

The sum of them is 48. Therefore, the other number is 48-5 or 43.

So, our two numbers are 43 and 5.

And we're done!

sveticcg [70]4 years ago
3 0

Answer:

5 and 43

I hope this helps!

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melisa1 [442]

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Substitute:

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7 0
4 years ago
An 8.5-meter ladder is leaning against a vertical wall. How many meters is its base from the wall if the ladder reaches 7.5 mete
Monica [59]

Answer:

  4 m

Step-by-step explanation:

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  b² + 7.5² = 8.5²

  b² + 56.25 = 72.25

  b² = 16 . . . . . . . . . . . . . subtract 56.25

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The base of the ladder is 4 m from the wall.

_____

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7 0
4 years ago
A rugby player passes the ball 7.75 m across the field, where it is caught at the same height as it left his hand. At what angle
prisoha [69]

<u>Answer-</u>

<em>At 15.91° the ball was thrown.</em>

<u>Solution-</u>

<em>In the question it is given that the ball was released and caught from the same height.</em>

We know that,

R=\frac{u^{2}\sin 2\Theta}{g}

Where,

R = Range of the projectile = 7.75 m,

u = Initial speed = 12 m/s

θ = Angle at which it was released

g = Acceleration due to gravity = 9.8 m/s²

Putting all the values,

\Rightarrow 7.75 = \frac{12^{2}\sin 2\Theta}{9.8}

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