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2 years ago

What is the inverse of the function? f(x) = 2x - 10?

Mathematics

1 answer:

gulaghasi [49]2 years ago

3 0

Answer:

Step-by-step explanation:

Let $f(x)=y$

y=2x-10

Switch x and y,

x=2y-10

x+10=2y

(x/2)+5=y

So $f^{-1}(x)=\frac{x}{2}+5$

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Usando las propiedades de la igualdad resuelve: 13r=117 y explica el procedimiento

Bas_tet [7]

Answer:

r=9

Step-by-step explanation:

13r=117

r=117/13

r=9

8 0

3 years ago

Factor completely. 2x^4+4x^3-30x^2

kramer

Answer:

Step-by-step explanation:

2x⁴ + 4x³ - 30x² = 2x²*(x² + 2x - 15)

x² + 2x - 15

Sum = 2

Product = -15

Factors = 5 ; (-3)

x² + 2x - 15 = x² + 5x - 3x - 3 *5

= x(x + 5) - 3(x + 5)

= (x + 5)(x - 3)

2x⁴ + 4x³ - 30x² = (2x²) (x + 5)(x - 3)

7 0

3 years ago

Evaluate log12 - log4 + log5 and can you explain it to me?

mario62 [17]

Remember some simple log rules

$log(a)+log(b)=log(ab)$
and
$log(a)-log(b)=log(\frac{a}{b})$

work from left to right

$log(12)-log(4)+log(5)=$
$log(\frac{12}{4})+log(5)=$
$log(3)+log(5)=$
$log(3*5)=$
$log(15)$

7 0

3 years ago

In DCAB, if ÐB = 380, What is ÐC?

Jobisdone [24]

What form is DCAB? and I do not see the point Đ

5 0

3 years ago

What is the length of line segment PQ? If you can please explain, thanks.

nydimaria [60]

Given:

Tangent segment MN = 6

External segment NQ = 4

Secant segment NP =x + 4

To find:

The length of line segment PQ.

Solution:

Property of tangent and secant segment:

If a secant and a tangent intersect outside a circle, then the product of the secant segment and external segment is equal to the product of the tangent segment.

$\Rightarrow NQ\times NP = MN^2$