Hi! Can someone help me with this maths problems? | hola! Alguien podria ayudarme con estos problemas de matemáticas? 1- In Sydney, on 18 January 2013, the maximum temperature was 45. 8°C and the minimum temperature was 21.7°C. What was the range in temperature that day?

round: Maximum_ Minimum_

Estimate difference:
Exact difference:

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -