3 years ago

How do you workout 8.4 divided by 40

Mathematics

1 answer:

NARA [144]3 years ago

7 0

8.4|40
84 |0.21
80 |
=40
40
 ==

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margos grade average in math 92. Then for seven month her average dropped an average of five-eighths of a point per month. write

Helga [31]

It is probably around 50 or close to that

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3 years ago

Find the numbers a, b and c if the polynomial x3−18x2+24xb−c is the cube of the binomial x+2a.

mojhsa [17]

Answer:

$a=-3\\ \\b=\dfrac{9}{2}\\ \\c=216$

Step-by-step explanation:

Use formula

$(u+v)^3=u^3+3u^2v+3uv^2+v^3.$

Hence,

$(x+2a)^3=x^3+3x^2\cdot 2a+3x\cdot (2a)^2+(2a)^3=x^3+6ax^2+12a^2x+8a^3.$

This expression is equal to

$x^3-18x^2+24bx-c,$

so we can equate the coefficients at powers of x:

$x^3:\ 1=1\\ \\x^2:\ 6a=-18\Rightarrow a=-3\\ \\x:\ 12a^2=24b\Rightarrow b=\dfrac{9}{2}\\ \\1=x^0:\ 8a^3=-c\Rightarrow c=-8\cdot (-3)^3=216.$

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3 years ago

I have two coins totaling 15 cents. One of them is it a nickel. What are they?

Aloiza [94]

One is a nickel and the other is a dime

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3 years ago

What is the cube of 6.

Svet_ta [14]

The cube of 6 is

6³.

We need to solve 6³.

To do that you need to multiply 6 by itself 3 times.

6 × 6 × 6 = 216.

So, 6³ = 216.

Hope I helped ya!!!☺☺☺

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3 years ago

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What is the geometrick mean of 27 and 8 with the pothagereom theorem

enyata [817]

Answer:

x = 6√6

Step-by-step explanation:

27/x = x/8

x² = 27 × 8

x = √(27 × 8)

x = √(9 × 4 × 6)

x = 3 × 2 × √6

x = 6√6

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2 years ago

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