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3 years ago

The difference between 3 times a number and 21 as an expression

1 answer:

3 0

$\bf \stackrel{\textit{number}}{x}~\hspace{5em}\stackrel{\textit{three times a number}}{3x}~\hspace{5em}\stackrel{\textit{difference of 3x and 21}}{3x - 21}$

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Mario is walking away from a motion detector at a rate of 1.5 feet per second. He started recording his distance from the motion

kipiarov [429]

Answer:

6 seconds

Step-by-step explanation:

Initial distance of Mario from motion detector = 2 ft

Speed of Mario = 1.5 ft/sec

Total distance of Mario from motion detector = 11 ft

Total distance moved by Mario while walking at the rate of 1.5 ft/sec = 11 - 2 = 9 ft

Given that:

Distance = 9 ft

Speed = 1.5 ft/sec

Formula:

$Distance = Speed \times Time$

$\Rightarrow 9 =1.5 \times Time\\\Rightarrow Time = \dfrac{9}{1.5}\\\Rightarrow Time = \bold{6\ sec}$

So, at 6 seconds, Mario will be 11 ft from the motion detector.

6 0

3 years ago

,,,,,....,,,,,:;,,,,,:(

pshichka [43]

start at -2 go over 2 and up 5

(-2, 5)

8 0

3 years ago

The sum of two numbers is 65 one is 4 times as large as the others.what are the numbers?

bixtya [17]

let the numbers be n and m

n+m=65

n=4m

So when we put our work in:

4m+m=65

5m=65

m=13

n=52

So therefore your two numbers are 52 and 13!

Hope this helped! °ω°

6 0

3 years ago

Find the mean for the group of data items. Round to the nearest hundredth, if necessary.

Ilya [14]

Answer:

The mean is 60.17 if round to the nearest hundredth.

Step-by-step explanation:

Add all the numbers together to get 361, then divide by 6 because that is how many numbers were added together.

7 0

4 years ago

Answer the equation according to the directions

Alchen [17]

Answer: 2x^9 Hope this helps!

5 0

4 years ago