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ddd [48]
3 years ago
11

What are the solutions to the equation x² + 16x + 14 = 0?

Mathematics
1 answer:
poizon [28]3 years ago
3 0

Answer:

-8+5√2 and -8-5√2

Step-by-step explanation:

Given the expression x² + 16x + 14 = 0

USing the general formulas

x = -16±√16²-4(14)/2

x = -16±√256-56/2

x = -16±√200/2

x = -16±10√2/2

x = -8±5√2

Hence the required solutions are -8+5√2 and -8-5√2

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igor_vitrenko [27]
3x9=27
21/3 = 7
so
7+27x9+5
27x9=243
243+7+5
answer is 255
6 0
3 years ago
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In a sale there is 25% off all prices a bed costs £33 how much was it before the sale ?
Troyanec [42]
25% OFF is 100%-25%=75%
75% is 0.75 in decimal form
if x is the original price then
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8 0
3 years ago
McKayla checked out 11 books from the library on Tuesday. On Wednesday, she went back to the library and checked out 23 more boo
tresset_1 [31]

Answer:

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Step-by-step explanation:

5 0
3 years ago
A rectangle has an area of 72 in². The length and the width of the rectangle are changed by a scale factor of 3.5. What is the a
kifflom [539]

Answer:

The area of the new rectangle is 882 in².

Step-by-step explanation:

Let l be the length and w be the width of the original rectangle,

So, the area of the original rectangle is,

A = l × w                  ( Area of a rectangle = Length × Width )

Given, A = 72 in²,

⇒ lw = 72 ------- (1),

Since, if the rectangle are changed by a scale factor of 3.5,

⇒ New length = 3.5 l,

And, new width = 3.5 w,

Thus, the area of the new rectangle = 3.5l × 3.5w

=(3.5)^2lw

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4 0
3 years ago
If the first chapter of a certain book is 40 pages long and makes up 20% of the book, how many pages does the entire book have?
Setler [38]

Answer:

200

Step-by-step explanation:

20% of a book = 40 pages

100% of a book = x pages

20/100 = 40/x                Cross multiply

20x = 100*40                 Combine the right

20x = 4000                    Divide by 20

20x/20 = 4000/20         Do the division

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5 0
3 years ago
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