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amid [387]
3 years ago
8

20 points!! Type the correct answer in the box. Use numerals instead of words. What value of n makes the equation true? -1/5n+7=

2 n =
Mathematics
1 answer:
vredina [299]3 years ago
6 0

Hey there! :)

Answer:

\huge\boxed{n = 25}

-1/5n + 7 = 2

Start by subtracting 7 from both sides:

-1/5n + 7 - (7) = 2 - (7)

-1/5n = -5

Multiply both sides by the reciprocal of -1/5, or -5.

(-5) · (-1/5n) = (-5) · (-5)

n = 25

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Using these axioms : Commutativity, associativity,, distributivity, the Additive identity, Multiplicative identity, Additive inv
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Answer:

See explanation below

Step-by-step explanation:

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The additive identity establishes that if you add a real number to zero, then you get the same real number back.

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a+b = 0, but by the additive identity we can add -a (the additive inverse of a) to both sides of the equation:

a + b - a = 0 - a

a + b - a = -a (Now, using the Cancellation property we can cancel a and -a on the left side)

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4 years ago
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3 years ago
Find the value of x for which line a is parallel to line b. (21)
Romashka [77]
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3 years ago
Two spheres have radii 6 and 15. Find the ratios of the areas and the volumes.
lina2011 [118]

Answer:

1st sphere has r1 = 6

=> Surface area S1 = 4 x pi x r1^2 = 4 x pi x 6^2 = 144pi

=> Volume V1 = (4/3) x pi x r1^3 = (4/3) x pi x 6^3 =288pi

2nd sphere has r1 = 15

=> Surface area S1 = 4 x pi x r1^2 = 4 x pi x 15^2 = 900pi

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Hope this helps!

:)

4 0
4 years ago
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