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3 years ago

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Mathematics

2 answers:

Colt1911 [192]3 years ago

5 0

The answer would be 8

kirill [66]3 years ago

3 0

Answer:

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Step-by-step explanation:

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Simplify the following expression:

Morgarella [4.7K]

Answer:

2nd option

Step-by-step explanation:

Given

2x - 8y + 3x² + 7y - 12x ← collect like terms

= 3x² + (2x - 12x) + (- 8y + 7y)

= 3x² + (- 10x) + (- y)

= 3x² - 10x - y

8 0

3 years ago

Write the following number in standard form 7.21x10^5

Ulleksa [173]

Answer:

721000

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

-5 + x =3 solve for x PLEASE HELP ME ASAP

hram777 [196]

Answer:

x = 8

Step-by-step explanation:

Step 1: Write equation

-5 + x = 3

Step 2: Solve for x

Add 5 to both sides: x = 8

Step 3: Check

Plug in x to verify it's a solution.

-5 + 8 = 3

3 = 3

5 0

3 years ago

Write the quadratic function in standard form. f(x) = -x2 + 2x + 4 f(x) =

goldenfox [79]

Answer:

$f(x)=-1(x-2)^2+8$

Step-by-step explanation:

Given:

The quadratic function is given as:

$f(x)=-x^2+2x+4$

The standard form of a quadratic function is given as:

$f(x)=a(x-h)^2+k$ , where, 'a', 'h' and 'k' are real numbers.

Now, in order to convert the given function to standard form, we use completing by square method.

$-x^2+2x=-(x^2-2x)=-[(x-2)^2-2^2]=-[(x-2)^2-4]=-(x-2)^2+4$

Now, $f(x)=-x^2+2x+4$ can be rewritten as:

$f(x)=-(x-2)^2+4+4\\f(x)=-1(x-2)^2+8$

Therefore, the standard form of the function is:

$f(x)=-1(x-2)^2+8$

7 0

3 years ago

Theo has one piece of train track that is 74 millimeters long and a second piece of train track that is 97 millimeters long.

umka21 [38]

A: 0.171 m, because 1 meter is 1,000 mm, and there is only 171 mm total.

3 0

3 years ago