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V125BC [204]
3 years ago
14

How many way can 4 people line up out of 20?

Mathematics
2 answers:
Angelina_Jolie [31]3 years ago
7 0

Answer:

80

Step-by-step explanation:

To do this problem you multiply 20x4 and that answer is 80.

Pani-rosa [81]3 years ago
3 0

Answer:

80

Step-by-step explanation:

20 x 4 = 80

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Write percent as a decimal 32.3%
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the height of a triangle is 9m less than its base. the area of the triangle is 56 m^2 find the length of the base (SHOW STEPS)
Veronika [31]
Hey there :)

We know the area formula of a triangle
\frac{1}{2} (base)(height)

We are given:
The area = 56 m²
The base = let p represent this
The height = 9 m less than the base = p - 9

Apply the formula
56 = \frac{1}{2} × ( p ) × ( p - 9 )
56 = \frac{1}{2} × ( p² - 9p )

Divide \frac{1}{2} on both sides
56 ÷ \frac{1}{2} = p² - 9p
112 = p² - 9p

Bring 112 to the other side and equate equation to 0
p² - 9p - 112

Factorise { Sum = -9 , Product = - 112 , therefore suitable factors = - 16 × 7 )
( p - 16 )( p + 7 ) = 0
     ↓          ↓
 p = 16    p = - 7  ←  Reject p = - 7 since length cannot be negative

So, the length  of the base is 16 m

Check:
56 m² = \frac{1}{2} × 16 × ( 16 - 9 )
56 m² = 8 × 7
56 m² = 56 m²
7 0
3 years ago
Out of 45 times at bay Raul got 19 hits, find Raul's batting average as a decimal and round it to the nearest thousandth
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Out of 45 times at bat, Raul got 19 hits. Find Rauls batting average as a decimal rounded tothe nearst thousandth.
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2 years ago
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