Answer:
Step-by-step explanation:
Koris current age = x
Josephs current age = 7 + x
Koris age after four years = x + 4
Josephs age after four years = 7 + 4 + x = 11 + x
In 4 years the sum of their ages will be 75.
So, (x + 4) + (11 + x) = 75
= 2x + 15 = 75
2x = 75 - 15
x = 60/2 = 30
Therefore koris current age = 30
Josephs current age = 30 + 7 = 37
Hope this helps . Have a nice day!
Answer:
7×+14=56
= 7×=56 -14
= × = 6
Step-by-step explanation:
I hope it helps you
Answer:
Step-by-step explanation:
Gauss n(n+1)/2
which is n? the last number of the sum
500(500 + 1)/2 = 125,250
800(800+1)/2 = 320,400
uh oh forgot to read the last one, give me a minute. done
(800 - 501 + 1)(800 + 501)/2
300(1301)/2 = 195,150
or
320,400 - 125,250 = 195,150
The linear function that tells the temperature, c, of the compound t minutes after 9:00 a.m. is given by:
c(t) = 10 + 0.8t
<h3>What is a linear function?</h3>
A linear function is modeled by:
In which:
- m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.
- b is the y-intercept, which is the value of y when x = 0.
In this problem:
- Initially, at 9:00 a.m., the temperature is of 10 degrees celsius, hence b = 10.
- In 15 minutes, the temperature increased by 12 degrees, hence the slope is of m = 12/15 = 0.8.
Hence, the function is:
c(t) = 10 + 0.8t
You can learn more about linear functions at brainly.com/question/24282972