Answer:
18
Step-by-step explanation:
basic math :/
Angle E = 180 -45 -63 = 72 degrees
Using the Law of Sines
FD / sine (E) = ED / sine (63)
3.8 / 0.95106 = ED / 0.89101
side DE = 3.8 * .89101 / .95106
side DE =
<span>
<span>
<span>
3.5600677139
</span>
</span>
</span>
Source:
http://www.1728.org/trigtut2.htm
Answer:
the answer is -24
Step-by-step explanation:
-48 = 2q
divide both sides by 2
Answer:
There are 22 quarters, 15 dimes and 72 nickels.
Step-by-step explanation:
The number of coins in the collection is 109.
Let the number of quarters = x
Let the number of dimes = y
Let the number of nickels = z
Therefore:
x + y + z = 109 -------------------------------------- (1)
There are 7 fewer dimes than quarters. This means that:
y = x - 7
=> x = y + 7
There are 3 less than five times as many nickels as dimes. This means that:
z = 5y - 3
Let us write equation (1) in terms of y to make it simpler to solve:
y + 7 + y + 5y - 3 = 109
Collecting like terms:
7y + 4 = 109
=> 7y = 105
y = 105 / 7
y = 15
Therefore:
x = 15 + 7 = 22
z = (5 * 15) - 3
z = 75 - 3 = 72
Hence, there are 22 quarters, 15 dimes and 72 nickels.
To confirm, 22 + 15 + 72 = 109
Um i think i know give me time to remember