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alukav5142 [94]
3 years ago
13

Danielle drives from her home to the store at an average speed of 40 miles per hour. She returns home along the same route at an

average of 60 miles per hour. What is her average speed, in miles per hour, for the entire trip
Mathematics
1 answer:
wolverine [178]3 years ago
5 0

she drove 40 mph & 60 mph

60 +40 = 100

100/2 = 50

 so she drove an average of 50 mph

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Tom wants to order tickets online so that he and three of his friends can go together to a water park. The cost of the tickets i
lesya692 [45]

Answer:

16n+2.50

Step-by-step explanation:

if you multiply 16 by 3 that gives you cost of three tickets and then add the 2.50 fee gives you the total

3 0
3 years ago
based on the function F(x)=x^4-3x^2-1 and the graph of G(x) below, which of the following statements is true?
Snezhnost [94]

Answer:

Step-by-step explanation:

A function has a root only if cuts the x axis .

If it cuts once it means it has one real root, if twice then two roots and so on .

Here in the graph of G(x) shown ,it never crosses the x axis so we can say that there is no real root of the given function G(x).

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8 0
3 years ago
Differentiate x^2/4-x^3​
Ede4ka [16]

Answer:

  x^4 + 8x          

  -----------------

    (4-x^3)^2

Step-by-step explanation:

d /dx  (x^2/(4-x^3)​)

When we differentiate a fraction u/v

df/dx = u/v

         =  v du/dx-u dv/dx

           ---------------------------

                         v^2

we know u = x^2   so du/dx = 2x

               v = (4-x^3)  so dv/dx = -3x^2

d dx =   (4-x^3) (2x)- x^2 ( -3x^2)

           -------------------------------------

                   (4-x^3)^2

Combining terms

           (8x-2x^4) --3x^4

           -------------------------------------

                   (4-x^3)^2

           8x-2x^4 +3x^4

           -------------------------------------

                   (4-x^3)^2

             x^4 + 8x          

           -------------------------------------

                   (4-x^3)^2

8 0
2 years ago
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Sunny_sXe [5.5K]

Answer:

25% or 30L

Step-by-step explanation:

100% is 120L, we know 75% is acid, we need the other 25% to make the 100%. 25% of 120 is 30, so 30 liters is pure acid

7 0
3 years ago
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Crank
M = -9 ; solve for m by simplifying both sides of the equation, then isolating the varible 
3 0
3 years ago
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