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2 years ago

Determine the solution set of x2 - 80 = 0

2 answers:

meriva2 years ago

8 0

   x² - 80 = 0
Add 80
to each side: x² = 80

Square root
each side: x    = √80

Look it up: x = + 8.944... (rounded)
   and
   x = - 8.944... (rounded).
___________________________________

Here's a cleaner solution:

   x² - 80 = 0
Add 80
to each side: x² = 80

Square root
each side: x    = √80

But 80 = 16 · 5

So √80 = √16 · √5

√16 = 4, so    x = 4 √5

Mekhanik [1.2K]2 years ago

6 0

X^2 -80=0
x^2 =80
x =sqrrt 80

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tresset_1 [31]

Answer:

C. 3.33 hours

Step-by-step explanation:

Use the algebra work equation:

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Plug in the values we know:

$\frac{1}{tb}$ = $\frac{1}{5}$ + $\frac{1}{10}$

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3 years ago

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Annette [7]

Answer:

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Step-by-step explanation:

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3 years ago

E is 3 more than d.<br> f is 5 less than d.<br> Write an expression for e in terms of d

Nataly_w [17]

Answer:

Part A:

We are given that E is 3 more than D. This means that to get the value of E, we will simply add 3 to the value of D

Therefore:

E = D + 3

Part B:

We are given that F is 5 less than D. This means that to get the value of F, we will simply subtract 5 from the value of D

Therefore:

F = D - 5

Part C:

To get the value of E-F, we will simply subtract the equation we obtained from part B from the equation we obtained from part A

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Step-by-step explanation:

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2 years ago

What is the formula for:

Masteriza [31]

Answer:

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3 years ago

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weqwewe [10]

So it’s basically asking for the difference

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2 years ago