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3 years ago

What is the sum for each of these??

Mathematics

1 answer:

Licemer1 [7]3 years ago

5 0

Step-by-step explanation:

$\frac{3}{5} + \frac{1}{2} \\ \\ \frac{6 + 5}{10} \\ \\ \frac{11}{10}$

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Xelga [282]

-6x+4y-28 sorry if it’s wrong

6 0

3 years ago

Which relations are functions?

rewona [7]

Answer:

{(2,4), (-1, 7), (3,0), (5,4)}

{(-6, 1), (0, 1), (2, 1), (3, 1)}

{(-3, -3), (-1, 6), (4, 5), (5, 4)}

Step-by-step explanation:

For a relation to be a function, the same x-value can't have multiple y-values.

For this reason, this relation is not a function:

{(-4,0), (-4,8), (-1, 3), (2,9)}

And these are functions:

{(2,4), (-1, 7), (3,0), (5,4)}

{(-6, 1), (0, 1), (2, 1), (3, 1)}

{(-3, -3), (-1, 6), (4, 5), (5, 4)}

5 0

3 years ago

A class is attended 21 boys and 15 girls. Write the ratio of girls to students in the class as a fraction in lowest terms

Otrada [13]

5/12 is the answer just do 15 and then add 15 + 21 to get 36 and then you reduce 15/36 and get 5/12

4 0

3 years ago

What is the sum of the series 3,---5,-13..........-229

Tpy6a [65]

ANSWER

$S_{30}= - 3390$

EXPLANATION

The given sequence is

3,-5,-13,.....-229.

The first term of this sequence is

a_1=3

There is a common difference of

$d = - 5 - 3 = - 8$

The last term of this sequence is -229.

The nth term of this sequence is given by:

$a_n=a_1+d(n-1)$

We use the last term to determine the number of terms in the sequence.

$- 229 = 3 + - 8(n - 1)$

$- 229 - 3= - 8(n - 1)$

$- 232= - 8(n - 1)$

Divide through by -8;

$29= (n - 1)$

$n = 30$

Hence there are thirty terms in the sequence.

The sum of the first n terms is given by:

$S_n= \frac{n}{2} ( a_{1} + l)$

The sum of the first 30 terms is given by:

$S_{30}= \frac{30}{2} ( 3 + - 229)$

$S_{30}=15( - 226)$

$S_{30}= - 3390$

4 0

3 years ago

Is 1/5 the same as 5?

vesna_86 [32]

Answer:

No, it is not.

Step-by-step explanation:

1/5 is equal to 0.2

5/1 is equal to 5 because there are 5 ones.

3 0

3 years ago