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3 years ago

X-7;x=23 what is anwer to this problem

Mathematics

1 answer:

Papessa [141]3 years ago

6 0

The answer is 16, all you must do is substitute x with the given value then solve, so 23-7

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Can anyone do these problems it’s for my daughter in law

Naya [18.7K]

Classwork:

Given $f(x) = x^2 - 1$ and $g(x)=2x+5$ , we have

(1) $(f\circ g)(x) = f(g(x)) = f(2x+5) = (2x+5)^2 - 1 = \boxed{4x^2+20x+24}$

Using the composition found in (1), we have

(2) $(f\circ g)(-2) = 4\cdot(-2)^2+20\cdot(-2)+24 = \boxed{0}$

(3) $(g\circ f)(x) = g(f(x)) = g(x^2-1) = 2(x^2-1) + 5 = \boxed{2x^2 + 3}$

Using the composition found in (3),

(4) $(g\circ f)(1) = 2\cdot1^2+3 = \boxed{5}$

Homework:

Now if $f(x)=x^2-3x+2$ , we would have

(1) $(f\circ g)(x) = f(2x+5) = (2x+5)^2-3(2x+5)+2 = \boxed{4x^2+14x+12}$

For (2), we could explicitly find $(g\circ f)(x)$ then evaluate it at x = -1 like we did in the classwork section, but we don't need to.

(2) $(g\circ f)(-1) = g(f(-1)) = g((-1)^2-3\cdot(-1)+2) = g(6) = 2\cdot6+5 = \boxed{17}$

(3) We can demonstrate that both methods work here:

• by using the result from (1),

$(f\circ g)(2) = 4\cdot2^2+14\cdot2+12 = \boxed{56}$

• by evaluating the inner function at x = 2 first,

$(f\circ g)(2) = f(g(2)) = f(2\cdot2+5) = f(9) = 9^2-3\cdot9+2 = \boxed{56}$

4 0

3 years ago

You rent an apartment that costs $1200 per month during the first year, but the rent

dimaraw [331]

Answer:

So first we have to figure out what $1200 per month for 12 months is since it was a year. 1200x12=14,400 a year which is outrageous for an apartment just saying.

Then we find out what 12% of the 1200 is and then add it to 1200.

To find the percentage of that we need to know how many times 12 fits into 100% 12 fits into 100 a total of 8.33333333333 times.

So now we divide 1200 by 8.33333333333 to see what 12% of it is.

1200 divided by 8.33333333333 is 144. So 1200+144=1344.

Now since one of the nine years has passed already we only have 8 remaining.

Now we see what 1344 a month for 12 months is 16,128 a year.

Now we multiply 16,128 by 8 to get the outcome of 8 more years. So 16,128x8=129,024

Thats it pls mark brainliest

Step-by-step explanation:

7 0

3 years ago

he price of apples went from $0.30 per lb to $0.90 per lb in three years. Find the rate of change of the price of apples. A) $0.

Tatiana [17]

To find the rate of change, find the total change in price and then divide it by number of years over which it changed. So the answer is $0.603 which is $0.20 per pound per year.

3 0

3 years ago

Read 2 more answers

2. Factorizar: 3ax – 3ay – 2bx + 2by help please :(

nekit [7.7K]

Answer:

There are no like terms.

Step-by-step explanation:

basically that is your answer you can not solve so it will be 3ax – 3ay – 2bx + 2by

7 0

2 years ago

Witch expression is equivalent to (-4y-x)-3y-9x)

sleet_krkn [62]

answer: -10x-7y

because you have to simplify the problem

7 0

3 years ago