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3 years ago

X^(2)+x^(2)=128 or x^2+x^2=128

Mathematics

2 answers:

LenaWriter [7]3 years ago

7 0

Answer:

8 =6 since 8 squared is 64 and 64 +64 or 64 times 2 is 128 that’s is your answer.

Step-by-step explanation:

Dvinal [7]3 years ago

4 0

Answer:

Step-by-step explanation:

x^2 + x^2 = 128 Normally you don't do this but rewrite the question

1x^2 + 1x^2 = 128

You actually do use 1 + 1 = 2 First time I've ever done that.

2x^2 = 128 Divide by 2

2x^2/2 = 128 / 2

x^2 = 64 Take the square root of both sides

sqrt(x^2)= sqrt(64)

x = 8

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A circle with area 16pi has a sector with a central angle of 8/5pi radians. What is the area of the sector?

lianna [129]

Answer:

The area of the sector is $12.8\pi\ units^2$

Step-by-step explanation:

we know that

The area of a complete circle (16π units^2) subtends a central angle of 2π radians

using proportion

Find out the area of a sector , if the central angle is equal to 8π/5 radians

$\frac{16\pi}{2\pi}=\frac{x}{(8\pi/5)}\\\\x=8(8\pi/5)\\\\x= 12.8\pi\ units^2$

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4 years ago

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Charlene is 8 years older than Aaron. The sum of their ages is 44. What are<br> their ages?

yKpoI14uk [10]

Answer: charlene:52, aaron:44

Step-by-step explanation:

Add 8 to aarons age and you find your answer

4 0

3 years ago

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Given f(x) = 2 / x-3 , find f(4)

Montano1993 [528]

Option #1:

$f(x)=\frac{2}{x-3}$

f(4), this means that x = 4

To find f(4), substitute/plug in 4 into "x" in the function:

$f(x)=\frac{2}{x-3}$ Plug in 4 into "x" since x = 4

$f(4)=\frac{2}{4-3}$

$f(4)=\frac{2}{1}$

f(4) = 2

Option #2:

$f(x)=\frac{2}{x} -3$

f(4), this means that x = 4

To find f(4), substitute/plug in 4 into "x" in the function:

$f(x)=\frac{2}{x} -3$

$f(4)=\frac{2}{4} -3$ To combine fractions, they need to have the same denominator. Multiply -3 by $(\frac{4}{4} )$ so that they have the same denominator.

$f(4)=\frac{2}{4} -3(\frac{4}{4} )$

$f(4)=\frac{2}{4} -\frac{12}{4}$ Combine the fractions

$f(4)=\frac{-10}{4}$ Simplify the fraction

$f(4)=-\frac{5}{2}$

4 0

3 years ago

postnew [5]

Answer:

see explanation

Step-by-step explanation:

Complementary angles sum to 90°, thus

∠A ∠B = 90 ← substitute values

5x - 27 + 4x - 27 = 90, that is

9x - 54 = 90 ( add 54 to both sides )

9x = 144 ( divide both sides by 9 )

x = 16

Hence

∠A = 5x - 27 = (5 × 16) - 27 = 80 - 27 = 53°

∠B = 4x - 27 = (4 × 16) - 27 = 64 - 27 = 37°

4 0

3 years ago

Factor out the gcf then factor the remaining trinomial.

kenny6666 [7]

Answer:

6(x - 1)(3x + 1)

Step-by-step explanation:

Given

18x² - 12x - 6 ← factor out 6 from each term

= 6(3x² - 2x - 1) ← factor the quadratic

Consider the factors of the product of the x² term and the constant term which sum to give the coefficient of the x- term

product = 3 × - 1 = - 3 and sum = - 2

The factors are - 3 and + 1

Use these factors to split the x- term

3x² - 3x + x - 1 ( factor the first/second and third/fourth terms )

= 3x(x - 1) + 1(x - 1) ← factor out (x - 1)

= (x - 1)(3x + 1)

Hence

18x² - 12x - 6 = 6(x - 1)(3x + 1) ← in factored form

8 0

3 years ago