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VLD [36.1K]
3 years ago
13

Ella has 50 stacks of ten pennies in each stack.how many pennies does she have in all

Mathematics
1 answer:
zhuklara [117]3 years ago
4 0
You would do 50x10. 5 x 1 is 5, plus the two zeroes we removed would make it 500, so she would have 500 pennies.
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What is the product of (2x-1)(x+4)
Novay_Z [31]

Answer:

\large\boxed{(2x-1)(x+4)=2x^2+7x-4}

Step-by-step explanation:

(2x-1)(x+4)\qquad\text{use FOIL:}\ (a+b)(c+d)=ac+ad+bc+bd\\\\=(2x)(x)+(2x)(4)+(-1)(x)+(-1)(4)\\\\=2x^2+8x-x-4\qquad\text{combine like terms}\\\\=2x^2+(8x-x)-4\\\\=2x^2+7x-4

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The curved part of this figure is a semicircle. What is the best approximation for the area of this figure? 18+12.125π units² 36
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18+12.125π units²

Step-by-step explanation:

The diameter of the semicircle can be found by the use Pythagoras theorem.

Δx²+Δy²=d²

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Δy=3--6=9

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97π/8 is equivalent to 18+12.125π units²

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Read 2 more answers
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