3 years ago

Kelly is 8 years younger than her sister. The sum of her age is 44 years. How old is jelly and how old is her sister?

Mathematics

1 answer:

Vladimir [108]3 years ago

3 0

Answer:

Kelly: 4

Sister: 12

Step-by-step explanation:

x=kelly's age

y=sister's age

x+y=44

x=y-8

(y-8)+y=44

2y-8=44

2y=36

y=12

x=12-8

x=4

You might be interested in

What is the average (arithmetic mean) of the first 90 measurements in a certain list of 92 measurements? (1) the average of the

marishachu [46]

The sum of all the measurements is just the average times the number.

$\bar x = \frac{1}{n} \sum_{i=1}^n x_i$

$\sum_{i=1}^n x_i = n \bar x$

So if the average of all 92 is 7 the sum of those is $92 \times 7$

The average of the last two is 7.2 so their sum is $2 \times 7.2$

That means the sum of the first 90 is $92 \times 7 - 2 \times 7.2$

so the average of the first 90 is

$\dfrac{92 \times 7 - 2 \times 7.2}{90} = 6.99556$ cm

7 0

3 years ago

The circle graph shows the percent of the 300 votes each candidate received in the

adell [148]

Answer: 126.

Here is an example of my work, just add your prefered numbers and boom, 126.

Also, mine was 200 instead of 300 and I got 84. So just plug in your number and boom.