Unicycle has 1 seat and 1 wheel.
Bicycle has 1 seat and 2 wheels.
u + b = 21
u + 2 b = 30 ⇒ u = 30 - 2 b
--------------------------------------
30 - 2 b + b = 21
30 - b = 21
b = 9, u = 30 - 18 = 12
There are 12 unicycles and 9 bicycles.
An equation in slope-intercept form:
u + b = 21
u = - b + 21
Answer: A ) u = - b + 21
Jeff should purchase 25 , 2 ounce box and it will cost him $27.5 .
<h3>What is an ounce ?</h3>
Ounce is defined as 1/16 part of a pound.
It is given that
price of a 2-ounce box is $1.10,
a 16-ounce box is $8.98
a 32-ounce box is $17.98.
As Jeff wants to purchase total 48 ounce chocolates , the box which is more cheaper has to be determined
The price of 1 ounce in a 2 ounce box is $1.1 /2 = $ 0.55
The price of 1 ounce in a 16 ounce box is $8.98 /16 = $ 0.56
The price of 1 ounce in a 32 ounce box is $17.98 /32 = $ 0.56
Therefore Jeff should purchase 25 , 2 ounce box and it will cost him $27.5 .
To know more about Ounce
brainly.com/question/26950819
#SPJ1
Answer:
The amount of the supplement in Niklas' body immediately after the 12th dose is 4.30 micrograms.
Step-by-step explanation:
Half life is the time required for an element to decay into half of its initial size. The supplement has a half life of 4 hours means that it decay to half of its size every 4 hours. Therefore there are 6 stages of division in a day.
i.e 
× × × × × = 
The amount of the supplement in Niklas' body after the first dose (first day) can be determined by;
= × 25
= 0.390625 micrograms
He used the supplement daily for 12 days (12th dose), but the amount of the supplement in his body immediately after the 12th dose would be;
amount in his body per day × number of period for complete decay
= 0.390625 × 11
= 4.296875
The amount of the supplement in Niklas' body immediately after the 12th dose is 4.30 micrograms. This is because immediately after the 12th dose, the supplement has not reach its half life.
<u><em>*(The Answer)*=</em></u> The initial value is 4
<u><em>*(The Explanation)*=</em></u> The initial value is basically the y-intercept which is found where the function touches the y-axis
Hope this helps and mark me brainiest. :)
188=28 v-8
28 v=188+8
28 v += 196
v=7
there u go !!!!
