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3 years ago

What is 8.478 in word form?

Mathematics

2 answers:

lys-0071 [83]3 years ago

8 0

Eight thousand four hundred and seventy eight

timama [110]3 years ago

7 0

Eight and four hundred seventy-eight thousandths

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Share £60 in the ratio 1:4

Hitman42 [59]

Answer:

Let one no. be 1x

other be 4x

x+4x=60

5x=60

x=12

4x=4×12

hope it helps :)

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3 years ago

I don’t know the answer

masya89 [10]

Answer:

?=1O or 15

Step-by-step explanation:

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3 years ago

What is .246 repeating (46 is repeating) as a fraction?

Drupady [299]

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3 years ago

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If the area of a right triangle is 9/16 sq. ft. and the height is 3/4 ft, write an equation that relates the area to the base,b,

Rudik [331]

Answer:

Base = 1.5 ft

Step-by-step explanation:

Area = ½ × base × height

9/16 = ½ × base × 3/4

9/16 = 3/8 × base

base = 9/16 × 8/3

base = 3/2

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3 years ago

What is the justification for the first step in proving the formula for factoring the sum of cubes?

Anna11 [10]

Explanation:

The formula isnt correctly written, it should state:

$a^3+b^3 = (a+b)(a^2-ab+b^2)$

You have to start from $(a+b)(a^2-ab+b^2)$ and end in a³+b³. On your first step, you need to use the distributive property.

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

This is equal to

$a*a^2-a*(ab) + a*b^2 + b*a^2-b*(ab) + b*b^2 = a^3 - a^2b + ab^2 +ba^2 -b^2a +b^3$

Note that the second term, -a²b, is cancelled by the fourth term, ba², and the third term, ab², is cancelled by the fifht term, -b²a. Therefore, the final result is a³+b³, as we wanted to.

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3 years ago