C= number of acres of corn
W= number of acres of wheat
total is 180 acres
c+w=180
want to plant 3 times as many corn as wheat
c=3w
substitute 3w for c in other
ctw=180
3w+w=180
4w=180
divide both sides by 4
subtract
c=3w
c=3(45)
c=135
135 acres of corn and 45 acres of wheat
First: subtract from the total cost a handling fee of $5.50 for the order:
$144.25 - $5.50 = $138.75
Next: divide it by the price of one ticket:
$138.75 : $27.75 = 5
Answer: Olga buy 5 tickets.
Other method:
t - number of tickets
The equation
27.75 · t + 5.50 = 144.25 |-5.50
27.75t = 138.75 |:27.75
t = 5
Notice, the graph starts off with an account balance of $10, at the 10 over the y-axis, that means the initial amount in the account, or what he initially deposited was 10 bucks.
now... let's use any of the points, say hmm the 2, 10.44.
after 2 years, he's got an extra 44 cents in it, went up to 10.44.
bearing in mind that is a linear graph, and thus is a simple interest rate.
Answer:
A = 0.65
B = 3.304
C = 6.07
Step-by-step explanation:
You have to subtract to the final result the initial one and divide it for the number of segments. Then, for every segment you add the number you found, for example:
Value of a segment:
Value of A:
Sin75° = Sin(30° + 45°)
= Sin30°.Cos45° + Sin45°.Cos30°
= 1/2 . √2/2 + √2/2.√3/2
= √2/2 ( 1/2 + √3/2 )
= √2/2 ((1+√3 ) /2 )
= (√2 + √6 )/ 4