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3 years ago

I need halp on this question plzz and ty

Mathematics

1 answer:

devlian [24]3 years ago

8 0

Answer:

Positive

Step-by-step explanation:

It gose upwards

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Put the following in Ascending order:<br> 54%, 2/5, .45<br><br> Help please

Stolb23 [73]

2/5, .46, 54% (smallest to biggest)

4 0

3 years ago

Which function is increasing?

egoroff_w [7]

Answer:

$f(x)=5^x$ , which is the third function listed among the possible answers.

Step-by-step explanation:

Notice that these are all exponential functions, that contain just "x" in the exponent, and one "1' as the accompanying coefficient. So, in order to decide which ones are increasing, we need to study the base of the expression with exponent "x".

If the base is a number smaller than one, the function is decreasing.

If the base is a number larger than one, the exponential function is increasing.

Therefore, the only one that shows a larger than one base is the third one :

$f(x)=5^x$

which is therefore the only increasing function of the group.

5 0

3 years ago

Can someone please help me with number 2?I don't know what I did wrong.

Dmitry [639]

Part A

Let's say point P is the starting point and point Q is the endpoint

x = one-way distance from P to Q, and vice versa

The goal is to find x, then compute 2x to find the round trip distance traveled.

We'll use this idea

distance = rate*time

which solves to

time = distance/rate

So when going from P to Q, the driver is going 70 mph and travels x miles

So the driver does this for distance/time = x/70 hours.

When going back, the driver slows down to 55 mph so the time taken here is x/55 hours.

The total time values add to x/70 + x/55 hours

Set this equal to the total driving time of 7 hours and solve for x

x/70 + x/55 = 7

70*55*(x/70 + x/55) = 70*55*7

70*55*(x/70) + 70*55*(x/55) = 26,950

55x + 70x = 26,950

125x = 26,950

x = (26,950)/125

x = 215.6 which is the one-way distance in miles

which then means,

2x = 2*215.6 = 431.2

Therefore, the total distance traveled is 431.2 miles

<h3>Answer: 431.2 miles</h3>

=========================================================

Part B

To find the duration of each trip, we simply need to evaluate x/70 and x/55. Those are the durations when going 70 mph and 55 mph respectively. These durations are measured in hours.

x/70 = (215.6)/70 = 3.08

x/55 = (215.6)/55 = 3.92

Note how 3.08+3.92 = 7 to help verify the answers.

<h3>Answers:</h3>