Answer:
<em>f=-14.4</em>
Step-by-step explanation:

Make a system of equations.


Plug in 2d for 'q' in the first equation:


Multiply:

Combine like terms:

Divide 0.60 to both sides:

Now plug this into any of the two equations to find 'q':



So she has 10 dimes and 20 quarters.
Step-by-step explanation:
Replace each x in the expression/equation with the given value. Then use order of operations to simplify and solve. There are some great videos out there explaining the concept.
It is 1a over bd and 8 over k
Answer:
5 miles
Step-by-step explanation:
The Pythagoras theorem : a² + b² = c²
where a = length = 4
b = base= 3
c = hypotenuse
4² + 3²
16 + 9 = 25
√25 = 5