X^-6
You can find the derivative:
-6x^ -7
<span>pennies = 0.01 $
nickels = 0.05 $
dimes = 0.1 $
quarters = 0.25 $
We must write the system of equations that best suits this problem and solve it:
Let:
x = pennies
y = nickels
z = dimes
w = quarters
Writing the equations
0.01x + 0.05y + 0.1z + 0.25w = 3.71
I have twice as many dimes as nickels
z = 2y
two more nickels than quarters
y = w + 2
three fewer pennies than three times the number of nickels
x = 3y-3.
Solving the system of equations:
x = 21
y = 8
z = 16
w = 6
answer
He has
21 pennies
8 nickels
16 dimes
6 quarters
</span>
Answer:
the battery rate is 6.5
Step-by-step explanation:
Answer:
Step-by-step explanation:
X = number of nickels
Y= number of dimes
.5x + .10x + 5= .80
.15x +.50 =.80
Subract .5 from both sides and
Divide by .15 on both sides
x= 2 therefore you have 2 nickels
And you have 7 dimes
Answer:
BC = 20.225
Step-by-step explanation:
Call the point on CD where the triangle vertex is point X.
Then we have ...
BC·tan(20°) = CX
DE·tan(25°) = DX
CX +DX = AB
AB·tan(20°) = AE
AE +DE = BC
Now we can write BC in terms of itself:
BC = AE +DE = AB·tan(20°) +DE
BC = (CX +DX)·tan(20°) +DE = (BC·tan(20°) +DE·tan(25°))·tan(20°) +DE
BC(1 -tan(20°)²) = DE(1 +tan(25°)·tan(20°))
BC = DE(1 +tan(25°)·tan(20°))/(1 -tan(20°)²) . . . . where DE = 15 cm
BC ≈ 20.225 cm
