3 years ago

What does This equation equal ?3.91 x 10-2 =

Mathematics

1 answer:

loris [4]3 years ago

4 0

Answer:

37.1

Step-by-step explanation:

Hope this is the right answer.

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Do you agree or disagree with the statement: "A rise of -7°C" means "a fall of 7°C"? Explain.

MrRissso [65]

Yes because either way you are saying that its -7°C for example rise -7°C (+(-7°) or a fall of 7° (-7°)

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3 years ago

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A map of Utah has a scale of 1 cm : 30 mi. The border of Utah and Wyoming measures about 3.7 cm. How long is the actual border o

Maru [420]

<span>3.7x 30 = </span>111 mi is the correct answer

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3 years ago

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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:

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

6 0

4 years ago

givi [52]

Answer:

Step-by-step explanation:

8 is the digit after 7 and previous to 9

8 0

4 years ago

I need help with this please

Norma-Jean [14]

Step-by-step explanation:

r = 30/2 = 15

circumference = π*30= 94.2

7 0

3 years ago