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3 years ago

Write -72=2y^2-16y-20x in standard form

Mathematics

2 answers:

zzz [600]3 years ago

8 0

y = √ 10 ( x − 2 )

y = − √ 10 ( x − 2)+ 4 + 4

kifflom [539]3 years ago

5 0

Answer:

-72=-12y-20x

Step-by-step explanation:

-72=2y^2-16y-20x

square the 2 keeping the variable

-72=4y-16y-20x

Then combine like terms in this case the numbers followed by y's

-72=-12y-20x

This is the standard form as there is nothing else you can combine to break this down any further

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What is the product of 5the square root of 3. • 4the square root of 15.? Simplify if possible. 60the square root of 5. 20the squ

svp [43]

Correct Answer: $60 \sqrt{5}$

We are to find:

$5 \sqrt{3} *4 \sqrt{15}$

Multiplying and simplifying the radicals, we get:

$20 \sqrt{45} \\ \\ 
=20 \sqrt{9*5} \\ \\ 
=20*3 \sqrt{5} \\ \\ 
=60 \sqrt{5}$

4 0

3 years ago

Read 2 more answers

Twice the quotient of a number and -24 is -8 Find the number. The number is ________.

Klio2033 [76]

Answer: The number should be 6

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2 years ago

Jarred went to the bookstore,

Fudgin [204]

Answer:

the original price of the book is $20

Step-by-step explanation:

sometimes in a question, they put things in the question that don't actually help us get to the answer. usually we ignore it, but i'm going to list them out just to help you a bit more.

Things that are useless:

his name is Jarred (his name could be gary, it doesn't affect us getting the answer)
he went to a bookstore (he could've gone to the library, it wont affect us getting to the answer)

the book is softcover (it could be any type of book, wont affect us getting to the answer)

the item is a book (it could be anything that he bought, wont affect us getting to the answer.)

Things that are helpful:

the book was on sale (helps us know that the price was reduced)
the book was on sale 10% (helps us know how much it was reduced by)
he spent $18 for the reduced price (helps us know how much he spent)

Ok, now that we know those, let's work on the question.

let b be the original book price

we need to find 10% so we have to use 90% (because 100 - 10 = 90)

if we needed to find 20% we would use 80% (because 100 - 20 = 80)

and so on.

90% of b = 18 (90% of the og. book price equals 18)

90/100 × b = 18 (write a correct equation and make the percent a fraction)

9/10 × b = 18 (simplify both sides of the equation)

9 × b = 180 (multiply both sides of the equation to get rid of fraction)

b = 20 (divide both sides of the equ. to get b by itself)

the original price of the book is $20

hope this helped :D

good luck my friend

- cheesetoasty

3 0

3 years ago

How to find restrictions for x?? 3. F(x)=2 sqrt x-4

stealth61 [152]

Answer:

none
none
x ≥ 4

Step-by-step explanation:

The restrictions placed on the independent variable in a function are those necessary to ensure that the function is defined for all allowed values of that variable.

In the graphs of problems 1) and 2), we see that the functions are defined for all values of x, so there are no restrictions.

3. For the function ...

$f(x)=2\sqrt{x-4}$

the value under the radical cannot be negative. The square root function is not defined for negative values, so the restriction is ...

x -4 ≥ 0

x ≥ 4 . . . . . . . add 4 to both sides of the inequality

4 0

3 years ago

How many zeros does the equation x^5 – 11^4+ 7 have?

ddd [48]

Answer:

Step-by-step explanation:

No. of Zeroes or Roots is equal to the degree of polynomial. Here, the degree of polynomial of the equation is 5. Hence, 5 Zeroes are possible.

5 0

3 years ago