Answer:
Step-by-step explanation:
if t varies inversely proportional as r, then,
t ∞ 1/r
t = k.1/r
t = k/r
substitute t =6 and r = 5 into the equation above
6 = k/5
k = 5 x 6 = 30
the equation that represents this variation is given by,
t =30/r
tr = 30
when r =15,
t = 30/15
t =2
Answer:
Cual es la forma más simple al efectuar la operación indicada en la expresión (-3) (-12) ? this means What is the simplest way to perform the operation indicated in the expression (-3) (-12)?
Step-by-step explanation:
Multiply -3 by -12 and get 36. hope this was helpful.
7 weeks. Total cost is 239 minus 127 she has saved leaves 112 more she needs to save. 112 divided by 16 a week is 7 weeks until she has enough money.
Answer:
0
Step-by-step explanation:
Combine like terms, perform the operations with the coefficients of the variable, then write the variable.
10r - 5r + 3r - 8r
= 5r + 3r - 8r
= 8r - 8r
= 0
