MATHEMATICS MIDDLE SCHOOL

Two brothers have a combined age of 21 years. Roger is twice as old as Bill was when Roger was as old as Bill is now. How old are they?

Answers

Answer 1
Answer: Roger is 14 and Bill is 7
Answer 2
Answer:

Answer: I suggest you try and work this answer out rather than cheating for school quiz!!

Step-by-step explanation:

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Which is the graph of parent function f(x)=2^x

Answers

Answer:

Graph D

Step-by-step explanation:

f(x)= 2^x

Given f(x) is a exponential function

The graph (a) is a graph of an absolute function because we have V shaped graph

The graph (b) is the graph of a line so it is a graph of a linear function

The graph (c) is a U shaped graph. U shaped graph is a graph of a quadratic function.

The graph (d) is a curve shaped graph. It is a graph of an exponential function.

Option D is the correct answer

$199 MP3 player; 15% discount

Answers

15% of $199 is:
$199* (15/100)= $29.85

$199 -$29.85= $169.15

The final answer is $169.15~
your answer is 170. what u do is take 199 and multiply it by .15% and that gave me 30$. then what u do is take 199 and subtract it by $30 and that gave me 270. I rounded it to the nearest 10nth place.

Use an example to describe the multiplicative relationship between two equivalent ratios.

Answers

2/4=8/16
this is the answer because 2×4=8 and 4×4=16 which is 8/16 this is a example

Jenny picked 25 roses. she gave away 10 roses. What percent of the roses did Jenny give away?

Answers

Divide 10 by 25, which would get you 4. Move the decimal over two to the left, because you wanted a percentage.

Jenny gave away 40% of the roses.

Answer:10 percent

Step-by-step explanation:

Because the question said she GAVE AWAY the answer is 10 persent.

Consider he function f(x)=2x-4 a.find the inverse of (x) and name it g(x) . Show your work B. Use function composition to show that f(x) and g(x) are inverses of each other .show work

Answers

A.\nf(x)=2x-4\to y=2x-4\n\n\text{change x to y and y to x}\n\nx=2y-4\n\n\text{solve for y}\n\n2y-4=x\qquad|+4\n\n2y=x+4\qquad|:2\n\ny=(1)/(2)x+2\n\nf^(-1)(x)=g(x)=(1)/(2)x+2\nB.\n\text{Verifying if two functions are inverses of each other is a simple two-step process.}\n1.\ \text{Plug}\ f(x)\ \text{into}\ g(x)\ \text{and simplify}\n2.\  \text{Plug}\ g(x)\ \text{into}\ f(x)\ \text{and simplify}\n\nIf\ g[f(x)]=f[g(x)]=x,\ then\ functions\ are\ inverses\ of\ each\ other.

f(x)=2x-4,\ g(x)=(1)/(2)x+2\n\ng[f(x)]=(1)/(2)(2x-4)+2=(1)/(2)(2x)+(1)/(2)(-4)+2=x-2+2=x\n\nf[g(x)]=2\left((1)/(2)x+2\right)-4=2\left((1)/(2)x\right)+2(2)-4=x+4-4=x\n\n\text{Since the results above came out OK, both}\ x,\text{ then we can claim}\n\text{that functions f (x) and g (x) are inverses of each other.}

Anyone good at Linear Equations and Intercepts if so please help. This stuff makes me feel stupid. What are the intercepts of the line?

A.
x-intercept: 0; y-intercept: 5

B.
x-intercept: 5; y-intercept: 0

C.
no x-intercept; y-intercept: 5

D.
x-intercept: 5; no y-intercept

Answers

If I can offer a suggestion ... You ought to look back in your book, or notes,
or homework, and recall what "intercept" means, and what one looks like.

The "y-intercept" of an equation is the point where
the graph crosses the y-axis.
On this graph, the line crosses the y-axis at y=5 .

The "x-intercept" of an equation is the point where
the graph crosses the x-axis.
On this graph, the line never crosses the x-axis at all.
(That DOESN't mean the x-intercept is zero.  It means there isn't any.)
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