Answer:
(0.118, 4.882)
Step-by-step explanation:
If a motorist drives for m hours at 120km/hr, then the Distance of the motorist is expressed as;
Distance = Speed * time
da = 120m
If he drives n hours at 18km/hr;
db = 18 * n
db = 18n
Speed of the motorist altogether is expressed as;
Speed =78km/5hrs
Speed = 15.6km/hr
SInce the total distnce is 78km
120m + 18n = 78 ....1 ..... * 1
If total time is 5hrs
m + n = 5....2 ...*18
Solve simultaneously
120m + 18n = 78
18m + 18n = 90
Subtract
120m - 18m = 78-90
102m = -12
m = 0.118 hrs
m =
Since m + n = 5
n = 5 - m
= 5 - 12/102
n = 4.882
Hence (m,n) is (0.118, 4.882)
A + b = X
12 + b = X
b = X - 12 <== the other number
Answer:
yes you're right :)
Step-by-step explanation:
you have to use the pythogram therom for this
a² + b² = c²
20² + 10² = c²
400 + 100 = c²
c = √500
Answer:
<em>Any length between 10 cm and 34 cm. </em>
Step-by-step explanation:
12 cm + 22 cm = 34 cm
22 cm - 12 cm = 10 cm
The possible measures of the third side are any length between 10 cm and 34 cm.
(a) Use the exponential growth or decay model: A (t) = a (1 + r) t where: a = 80 (initial number of 80 animals) -3.5% = -0.035 (decay rate) t → ( number of time periods, years) Then the model is: A (t) = 80 (1 - 0.035) or A (t) = 80 (0.965) t