3 years ago

I think of a number, halve it, than subtract four

Mathematics

1 answer:

SCORPION-xisa [38]3 years ago

6 0

Answer:

8 4 8 4 8 4 jdndsjssjsnnssjnss

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If f(x+1)=3x+4,find f(x) and f(3).

dexar [7]

f(x+1)=3x+4

Let y be x+1
So x=y-1

$\\ \sf\longmapsto f(y)=3(y-1)+4$

$\\ \sf\longmapsto f(y)=3y-3+4$

$\\ \sf\longmapsto f(y)=3y+1$

$\\ \sf\longmapsto f(x)=3x+1\checkmark$

$\\ \sf\longmapsto f(3)$

$\\ \sf\longmapsto 3(3)+1$

$\\ \sf\longmapsto 9+1$

$\\ \sf\longmapsto 10$

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3 years ago

Let E= {prime numbers less than 30} Work out n(E)

Doss [256]

Answer:

Step-by-step explanation:

E={2,3,5,7, 11, 13, 17, 19, 23, 29}

therefore,

n(E)={10}

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3 years ago

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How do you find the circumference of a circle? What is the formula?

victus00 [196]

Answer:

$\pi r2$ or $\pi d$

Step-by-step explanation:

To find the circumference, you must first find either the diameter or the radius.

To find the diameter, you can multiply the radius twice.

To find the radius, you can divide the diameter by 2.

Once you have the diameter, you then multiply it by pi, also known as 3.14.

Once you have the radius, you them multiply it by pi, also known as 3.14, and then multiply your product by 2.

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3 years ago

For an arithmetic sequence where a1 = 17 and the common difference is 5, find s7. A. 229 B. 235 C. 224 D. 219 please show steps

Furkat [3]

Answer:

The correct answer is C. 224

Step-by-step explanation:

Sn = n/2 (2*A1 +d(x-1))

S7=7/2(2*17+5(7-1))

S7=7/2(34+30)

S7=7/2(64)

S7=7*64/2

S7=7*32/1

S7=224

Hope This Helps, If So Mark As Brainliest! :)

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3 years ago

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position number 1 6 2 7 3 8 4 9 n ? Consider the sequence in the table. Which formula gives the number that would be in the nth

UNO [17]

Answer:

Step-by-step explanation:

Given:

$a_1=6=1+5\\\\a_2=7=2+5\\\\a_3=8=3+5\\\\a_4=9=4+5$

$\implies a_n=n+5$

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3 years ago