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2 years ago

11

Which pair of functions are inverse of eachother ?

1 answer:

Doss [256]2 years ago

6 0

Answer: a

Step-by-step explanation:

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Vinvika [58]

If the first term of the function is negative then the parabola will open down and it has a maximum value.

If the first term of the function is positive then the parabola will open up and it has a minimum value.

In the case of your example the parabola will open down and will have a maximum value.

hope this helps :)

7 0

2 years ago

Read 2 more answers

James has a total of 66 dollars in his piggy bank. He only has one dollar bills and two dollar bills in his piggy bank. If there

gavmur [86]

Answer:

32 one-dollar bills.

Step-by-step explanation:

Let <em>x </em>represent one-dollar bills and <em>y </em>represent two-dollar bills.

He has a total of 49 bills. Therefore:

$x+y=49$

The total amount of money James has is 66. <em>x</em> is worth one dollar, while <em>y</em> is worth two dollars. Therefore:

$1x+2y=66\\x+2y=66$

We have a system of equations. Solve by substitution:

$x+2y=66\\x+y=49\\x=49-y\\(49-y)+2y=66\\y=17\\x=49-17=32$

Therefore, James has 32 one-dollar bills and 17 two-dollar bills.

Checking:

$32(1)+17(2)\stackrel{?}{=}66\\32(1)+17(2)\stackrel{\checkmark}{=}66\\\\32+17\stackrel{?}{=}49\\49\stackrel{\checkmark}{=}49$

5 0

3 years ago

If McDonald sells 5 cows for $100 each and buys a horse for $250 how much would he have

Radda [10]

Answer: 250

Step-by-step explanation:

5(1000)=500

500-250= 250

3 0

2 years ago

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Find the sum of this arithmetic series.<br> | 26 + 24.5 + 23 + 21.5 + ... - 17.5

emmainna [20.7K]

Answer:

127.5

Step-by-step explanation:

The given series is 26 + 24.5 + 23 + 21.5 + ... - 17.5

The first term of this series is a=26

The common difference is d=24.5-26=-1.5

The last term of the series is -17.5

The nth term is given by:

$u_n=a+d(n-1)$

$26+-1.5(n-1)=-17.5$

$-1.5n=-17.5-26-1.5$

$-1.5n=-45$

n=30

The sum of the series:

$S_{n}=\frac{n}{2}(a+l)$

$S_{30}=\frac{30}{2}(26+-17.5)$

$S_{30}=127.5$

8 0

2 years ago

Daniel worked for 2 1/3 hours and earned $18.20. How much would he make if he worked for 5 1/4 hours? Enter your answer in the b

Aleks04 [339]

2 1/3hrs→ $18.20
1 hr→ $7.80
5 1/4hrs→ $7.80x5 1/4= $40.95

5 0

2 years ago

Read 2 more answers