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Reil [10]
3 years ago
10

While driving on the highway, Fiona averages 60 miles per hour. In the city, she averages 30 miles per hour. On a trip to her gr

andmother's house, Fiona drives 312 hours on the highway and 112 in the city. What is Fiona's average speed for the entire trip to her grandmother's house?
Mathematics
1 answer:
Vlad [161]3 years ago
7 0

((312  \div (312 + 112)) \times 60mph) +  \\ ( (112 \div (312  + 112)) \times 30mph) \\  = 52.1mph(3 \: s.f.)

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8/9k + 9/5 = -4 - 9/7k
Mamont248 [21]

Answer:

k=-1827/685

Step-by-step explanation:

8/9k+9/5=-4-9/7k

8/9k-(-9/7k)=-4-9/5

8/9k+9/7k=-20/5-9/5

56/63k+81/63k=-29/5

137/63k=-29/5

k=(-29/5)/(137/63)

k=(-29/5)(63/137)

k=-1827/685

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3 years ago
TEMA: Propriedade de Potência e Multiplicação de Números Negativos e Positivos.
GalinKa [24]
The correct answer is 34
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3 years ago
A car traveled 120 miles driving 60 miles per hour. The trip took 2 hours.
Ugo [173]
To answer this all you need to do is divide 120 by 50

120/50
2.4

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8 0
3 years ago
Determine whether the point (2, 2) is a solution to the system of equations. Explain your reasoning in complete sentences. Prove
goblinko [34]

Answer:

(0,2) is the solution of the given functions.

Step-by-step explanation:

We have been given two functions  f(x)=|x-1|+1  and g(x)=3x+2

To find the solution of the two functions mathematically, we will equate the given functions:

3x+2=|x-1|+1

3x+1=|x-1|

When we will open the modulus function we will have two values +, -

In positive case:

3x+1 =x-1

2x=-2

x=-1

Now, substitute x=-1 in g(x)=3x+2 we get

g(-1)=3(-1)+2=-1

Hence, (-1,-1) is the solution of the given functions.

In negative case:

Now, 3x+1=-(x-1)

3x+1=-x+1

4x=0

x=0

Now, put x=0 in g(x)=3x+2 we get

g(0)=3(0)+2=2

We have another solution: (0,2)

The point (2,2) is not the solution.

And graphically, the solution of two functions is their intersection point which is (0,2)

Hence, (0,2) is the solution of the function.


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3 years ago
Adjacent and congruent to
Viefleur [7K]
To what ???? Was there supposed to be a picture?
7 0
3 years ago
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