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2 years ago

Add 3.2+(-0.8) Plot the first addend and the sum on the number. where do I plot them.??

Mathematics

1 answer:

katrin2010 [14]2 years ago

4 0

The answer to this problem is 2.4.

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If(√14/√7-2)-(√14/√7+2)=a√7+b√2 find the values of a and b where a and b are rational numbers

seraphim [82]

Answer:

a = 4/3 and b = 0

============================

<h2>Given expression:</h2>

$\dfrac{\sqrt{14} }{\sqrt{7}-2} -\dfrac{\sqrt{14} }{\sqrt{7}+2}$

<h2>Simplify it in steps:</h2>

Bring both fractions into common denominator:

$\dfrac{\sqrt{14} (\sqrt{7}+2)}{(\sqrt{7}-2)(\sqrt{7}+2)} - \dfrac{\sqrt{14} (\sqrt{7}-2)}{(\sqrt{7}-2)(\sqrt{7}+2)}$

Simplify:

$\dfrac{\sqrt{14} ((\sqrt{7}+2) - (\sqrt{7}-2))}{(\sqrt{7}-2)(\sqrt{7}+2)} =$

$\dfrac{\sqrt{14} (\sqrt{7}+2 - \sqrt{7}+2)}{(\sqrt{7}-2)(\sqrt{7}+2)} =$

$\dfrac{4\sqrt{14} }{(\sqrt{7}-2)(\sqrt{7}+2)} =$

$\dfrac{4\sqrt{14} }{(\sqrt{7})^2-2^2} =$

$\dfrac{4\sqrt{14} }{7-4} =$

$\dfrac{4}{3} \sqrt{14} }$

Compare the result with given expression to get:

a = 4/3 and b = 0

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2 years ago

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V=pir^2(h/3)
V= 3.14x18^2x6/3
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3 years ago

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TiliK225 [7]

Answer:

A. 0.25 (rounded)

B. 0.19 (rounded)

C. 0.17 (rounded)

D. 0.17 (rounded)

Step-by-step explanation:

Hope that helped!

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3 years ago

Select all ordered pairs that satisfy the function of y=2/3x+1.

kvv77 [185]

Answer:

Step-by-step explanation:

Plugging in all the values into the equation, only A holds a true statement.

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3 years ago

Read 2 more answers

Find f(x) and g(x) so that the function can be described as y = f(g(x)).

mote1985 [20]

let g(x) = x^2+2 let f(x) = 9/x f(g(x)) is therefore equal to f(x^2 + 2) which is equal to 9/(x^2+2).

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3 years ago

Add 3.2+(-0.8) Plot the first addend and the sum on the number. where do I plot them.??​

Add 3.2+(-0.8) Plot the first addend and the sum on the number. where do I plot them.??