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KonstantinChe [14]
3 years ago
13

John left his house in Irvine at 8:35 am to drive to a meeting in Los Angeles, 45 miles away. He arrived at the meeting at 9:50.

At 3:30 pm, he left the meeting and drove home. He arrived home at 5:18.
a What was his average speed on the drive from Irvine to Los Angeles?
b What was his average speed on the drive from Los Angeles to Irvine?
c What was the total time he spent driving to and from this meeting?
d John drove a total of 90 miles roundtrip. Find his average speed. (Round to the nearest tenth.)
Mathematics
1 answer:
Vsevolod [243]3 years ago
4 0

Answer:

b is the correct answer. I'm 95% positive

Step-by-step explanation:

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Answer:

Step-by-step explanation:

k=3

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For f(x) = -4x -9 evaluate for f(6.5)​
kolezko [41]

Answer:

f=−35

Step-by-step explanation:

<em>1.Simplify  4×6.5 to 26</em>

f=-26-9

<em>2. Simplify  -26-9 to  -35</em>

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7 0
3 years ago
Los puntos de intersección de los gráficos de f(x)=x2+6x−7 y g(x)=4x−10
alisha [4.7K]

Answer:

Those graphs do not intersect.

Estes gráficos no se intersecciónan

Step-by-step explanation:

The intersection points are x for which:

f(x) = g(x)

In this question:

f(x) = x^{2} + 6x - 7

g(x) = 4x - 10

So

x^{2} + 6x - 7 = 4x - 10

x^{2} + 2x + 3 = 0

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

ax^{2} + bx + c, a\neq0.

This polynomial has roots x_{1}, x_{2} such that ax^{2} + bx + c = a(x - x_{1})*(x - x_{2}), given by the following formulas:

x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}

x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}

\bigtriangleup = b^{2} - 4ac

In this question:

x^{2} + 2x + 3 = 0

So a = 1, b = 2, c = 3

\bigtriangleup = b^{2} - 4ac = 2^{2} - 4*1*3 = -8

Sincce \bigtriangleup is negative, there are no solutions, which means that those graphs do not intersect.

7 0
3 years ago
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Dmitrij [34]

answer:what can i help you with

Step-by-step explanation:

6 0
3 years ago
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