All categories

3 years ago

Which algebraic expression represents the phrase "seven more than half of a number"?

Mathematics

1 answer:

Igoryamba3 years ago

3 0

Answer:

i believe it is the first answer.

Step-by-step explanation:

You might be interested in

I need help please and thank you

bazaltina [42]

Answer:

15ft

Step-by-step explanation:

4/2=2

10/2=5

3/2=1.5

2x5x1.5=15ft

8 0

3 years ago

What is 125% of 50?<br> (Explanation too please)

allsm [11]

Yeah i think it’s uh i think it’s a correct

3 0

3 years ago

[100 POINTS]!!

Lelechka [254]

The first thing that shoyuld be noted is that you have linear functions here : straight lines in your graph

6 0

3 years ago

Marcus earns 15% commission on his total sales at work.

vodomira [7]

Answer:your answer to this prob,problem, is c) $108.75

Step-by-step explanation:

6 0

3 years ago

Which equation is the inverse of y = 9x2 - 4?

m_a_m_a [10]

Answer:

The inverse will be:

$y' = \frac{\sqrt{x+4}}{3}$

Step-by-step explanation:

In order to find the inverse of the equation, we do a variable change, since we are finding the inverse, :

$f(x) = 9x^{2} - 4$

$y = 9x^{2} - 4$

$x = 9y' ^{2} - 4$

Now solve for y'.

First add 4 in both sides of the equation and change to the left y'.

$x + 4= 9y'^{2} - 4+4$

$9y'^{2}$ = x + 4

Second divide by 9

$9y'^{2}$ /9 = (x + 4)/9

$y'^{2}$ = (x + 4)/9

Now you will have to clear y, with the square root.

$[tex]y'^{\frac{2}{2}} = \sqrt{x + 4} / \sqrt{9}$ [/tex] =

Simplifying terms

$y' = \frac{\sqrt{x+4}}{3}$

$f^{-1}(x) = \frac{\sqrt{x+4}}{3}$

You can check the answer by doing the evaluation of the following equation:

(f o $f^{-1}$ ) (x)

substitute the equation for y' or inverse function $f^{-1}$

f( $\frac{\sqrt{x+4} }{3}$ )

Now substitue the value into f(x)

You will have

$= 9(\frac{\sqrt{x+4} }{3}} )^{2} - 4\\\\Solving\\\\9(\frac{{x+4} }{9}} ) - 4$

5 0

3 years ago