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vaieri [72.5K]
2 years ago
12

Select the correct answer. Which function is the inverse of function f(x) = -2

Mathematics
2 answers:
Artemon [7]2 years ago
8 0

Answer:

B

Step-by-step explanation:

let f(x) = y and rearrange making x the subject

y = \frac{x+2}{7} ( multiply both sides by 7 to clear the fraction )

7y = x + 2 ( subtract 2 from both sides )

7y - 2 = x

Change y back into terms of x with x the inverse function, that is

p(x) = 7x - 2

RSB [31]2 years ago
8 0
B ..................
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What the percent of 160 is 56? Use the bar model
kow [346]

Answer:

35%

Step-by-step explanation:

See attached for visual

  • 160= 8*20
  • 8 = 1/20 = 5% of 160
  • 56= 8*7
  • 7*5% = 35%

56 is 35% of 160

8 0
3 years ago
What is the probability of flipping a coin 10 times and getting tails 7 times ? Round your answer to the nearest tenth of a perc
KatRina [158]

Answer:

Option C: 11.7%

Step-by-step explanation:

The number of elements in sample space when a coin is flipped 10 times will be:

n(S) = 2^{10} \\= 1024

Let A be the event that the tails appear 7 times:

Then,

C_{(n,k)}=\frac{n!}{(k!)(n-k)!} \\where\\n=population\\k=picks\\In our case, k =7\\and\\n=10\\C_{(10,7)}= \frac{10!}{(7!)(10-3)!}\\= 120\\So, \\P(A) = \frac{n(A)}{n(S)} \\P(A) = \frac{120}{1024} \\= 0.1171\\

Converting into percentage:

P(A) = 0.1171*100=11.7%

So, option C is correct ..

6 0
3 years ago
the middle School golf team is selling golf balls to raise $850 for new equipment they sell golf balls for $2 each a case has 24
aniked [119]

Answer:

The number of cases of golf ball that team needed to raise money for equipment  is 3 .

Step-by-step explanation:

Given as :

The amount needed for new equipment = $850

The cost of each golf ball = $2

The number of packs of golf ball in each case = 24

The number of golf ball in each pack = 6

Let The number of cases of golf ball team needed to raise money for equipment = n cases

Now, According to question

∵ 1 pack has 6 balls

so, 24 pack has 6 × 24

i.e 24 packs has 144 balls

So, The number of balls in each case` = 144 balls

<u>Again</u>

∵ cost of 1 ball = $2

So, cost of 144 balls = $2 × 144

i.e cost of 144 balls in each case = $288

<u>Again</u>

∵ The amount needed for new equipment = $850

So, The number of cases of golf ball team needed to raise money for equipment = \dfrac{amount needed for new equipmen}{cost of 144 balls in each case }

Or, n = \dfrac{850}{288}

∴ n = 2.9 ≈ 3

So, The number of cases of golf ball that team needed to raise money for equipment  = n = 3

Hence, The number of cases of golf ball that team needed to raise money for equipment  is 3 . Answer

3 0
3 years ago
You bought a new car in 2015 for $32,000 that is depreciating in value by 15% each year. Write a function to represent this situ
Hitman42 [59]

Function: x = years

x = $32,000-15%x

Value of car in 2020:

$8000

4 0
2 years ago
You have $1,000 to invest. You invest 25% in a Money Market account, 50% in stocks, and 25% in bonds. What is the dollar amount
kirill115 [55]

Answer:

you have $250 in market and bonds and $500 in stocks.

step-by-step explanation:

you split 1,000 into 4 quarter and take two of those quarters and there is what you invested in stocks and take one quarter for market and one quarter for bonds.

7 0
2 years ago
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