The average value of all the pennies, nickels, dimes, and quarters in Paula's purse is 20 cents. If she had one more quarter, the average value would be 21 cents. How many dimes does she have in her purse

7 0

2 years ago

Factor the expression 100n squared - 1

frez [133]

Factor using the difference of squares.

a^2-b^2 = (a+b)(a-b)

100n^2-1
(10n+1)(10n-1)

Final answer: (10n+1)(10n-1)

4 0

3 years ago

Delana also bought 3 bags of pencils with 12 pencils in each bag.When the party began, she found that 13 of the pencils were bro

Ymorist [56]

Answer:

Step-by-step explanation:

3*12=36-13=20

5 0

3 years ago

What is the antiderivative of 4/e^4x?

Andrews [41]

$\displaystyle
F=\int \dfrac{4}{e^{4x}}\, dx\\
F=4 \int e^{-4x}\, dx\\
F=4 \cdot\left(-\dfrac{1}{4}e^{-4x}\right)+C\\
F=-e^{-4x}+C$

7 0

3 years ago