3 years ago

Express the sum 7 + 14 + 21 + 28 + . . . + 105 using sigma notation.

Mathematics

1 answer:

olasank [31]3 years ago

6 0

7+14+21+28+...+105=1*7+2*7+3*7+4*7+...+15*7

15
∑7*n=7*1+7*2+7*3+7*4+...+15*7=7+14+21+28+...+105
n=1

You might be interested in

Josslyn has nickels and dimes in her pocket. The number of nickels is three more than seven times the number of dimes let d repr

vfiekz [6]

$7d+3$ Explanation

to solve this we need to translate into math terms, so

Step 1

a) let d represents the number of dimes

let n represents the number of nickles

re write the expressions

$\begin{gathered} number\text{ of dimes=d} \\ seven\text{ times the number of dimes = 7d} \\ \end{gathered}$

The number of nickels is three more than seven times the number of dimes in other words you have to add 7 to seven times the number of dimes to obtain the number of nickles

hence

$n=7d+3$

therefore , the expression for the number of nickles is

$7d+3$

I hope this helps you

3 0

1 year ago

Carlitos purchased $13.90 of roasted almonds to make his own almond milk.He purchased 5 pounds of almonds.Assuming the cost per

AleksAgata [21]

$2.78
Explanation: 13.90/5=2.78

7 0

3 years ago

If ƒ={(5, 1),(6, 2),(7, 3),(8, 1),(9, 7)}, then the range of ƒ is {(1, 5),(2, 6),(3, 7),(1, 8),(7, 9)} {1, 2, 3, 7} {5, 6, 7, 8,

navik [9.2K]

Answer:

{1,2,3,7}

Step-by-step explanation:

The range of a relation is the set of y-values of the ordered pairs.

The given relation is:

ƒ={(5, 1),(6, 2),(7, 3),(8, 1),(9, 7)},

The set of y-values of the given ordered pairs are;

{1,2,3,7}

Therefore the range of y is {1,2,3,7}

5 0

3 years ago

Read 2 more answers

What is 713.49 written in standard form?

Nuetrik [128]

Answer: Seven hundred thirteen point forty-nine.

Step-by-step explanation: Hope this helps ;)

4 0

2 years ago

Which diagram could be used to prove<br> ABC - ADEC using similarity transformations?

Simora [160]

Answer:

the answer is C

Step-by-step explanation:

8 0

3 years ago