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spin [16.1K]
3 years ago
15

I need help with number 16

Mathematics
2 answers:
Sladkaya [172]3 years ago
8 0

You are correct

for example f(1) = 3

and   f(2) = f(2-1) - 2

= f(1) - 2

= 3 - 2 = 1

lana [24]3 years ago
5 0

f(n) = f(n-1) - 2

f(1) = 3        eq1

f(2) = f(2-1) - 2

     = f(1) - 2.   put value from eq1 here

     = 3 - 2

     = 1

f(3) = f ( 3 - 1 ) - 2

     = f(2) - 2

     = 1 - 2

     = -1

f(4) = f( 4 -1 ) - 2

     = f( 3 ) - 2

     =  -1 - 2

     = -3


3,1,-1,-3



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What's the answer to this? and please explain.
vichka [17]
<h3>Answer: No, there isn't enough ribbon</h3>

===========================================================

Use this formula

a & b/c = (a*c+b)/c

to convert from a mixed number to an improper fraction

So,

a & b/c = (a*c+b)/c

3 & 3/4 = (3*4+3)/4

3 & 3/4 = 15/4

---------------------------------------------------

Next, we add the fractions 15/4 and 5/6. The denominators aren't the same, so we can't add right away. We need to get the denominators to the LCD.

In this case, the LCD is 4*6 = 24

  • The fraction 15/4 becomes 90/24 after multiplying top and bottom by 6.
  • The fraction 5/6 becomes 20/24 after multiplying top and bottom by 4

Now we can add the fractions:

90/24+20/24 = (90+20)/24 = 110/24

---------------------------------------------------

So far, we've added the 3&3/4 portion to the 5/6 portion to get the result 110/24

The last thing to do is to add on the two 1/3 ft pieces, which means we're adding on 2/3 of a foot

2/3 = 16/24 after multiplying top and bottom by 8

Add this to the result of the last section

110/24+16/24 = (110+16)/24 = 126/24

---------------------------------------------------

From here, we convert the improper fraction 126/24 to decimal form

Using a calculator, you should find that 126/24 = 5.25

The result is larger than 5, which means she used too much ribbon. There won't be enough ribbon to do everything she wants to do.

---------------------------------------------------

The shortcut we can take is to type the following into the calculator

3+3/4+5/6+2/3

doing so should lead to 5.25

5 0
3 years ago
Read 2 more answers
Least common multiple of 11,39,35,8
scoundrel [369]
Factor each out:
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39: 3*13
35: 5*7
8: 2*2*2
since you can see no common factor just multiply them all to get 120120
5 0
3 years ago
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Is 0.069 less than 0.07
Nuetrik [128]
Yes, 0.069 is less than 0.07~

First, we compare the "one" place: 0 = 0.

Second, we compare the "tenth" place: 0 = 0.

Next, we compare the "hundredth" place: 6 < 7.

Because 6 < 7, 0.069 < 0.07 as a result~
6 0
3 years ago
(a + b)(a ² - ab + b ²)
erastova [34]
Hi there!

You can use distributive property to solve this equation.

These are the list of terms you have to multiply :
a × a² = a³
a × -ab = -a²b
a × b² = ab²
b × a² = a²b
b × -ab = -ab²
b × b² = b³

add all of those terms...
a³ - a²b + ab² +a²b -ab² + b³
simplify by adding like terms... (- a²b + a²b , ab² - ab²)

a³ + b³

Hope this helped!! :)
4 0
3 years ago
How do you get an addition problem that equals -3
charle [14.2K]

Answer:

To get to -3 you can do 1+-4

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