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3 years ago

There is a number such that 7 times the number minus 15 is equal to 41

Mathematics

2 answers:

mylen [45]3 years ago

7 0

Answer: 6.571

Step-by-step explanation: If you want the exact answer, it’s 6.57142857

Mamont248 [21]3 years ago

7 0

Answer:

8 is the number

Step-by-step explanation:

So in order to find out the "number" we are going to have to turn the equation around. First of all the equation says "minus 15 is equal to 41" so we are going to add 15 to 41:

41 + 15 = 56

So now we are going to divide 7 from 56 because we are doing the equation backwards:

56/7 = 8

So now we check our work by replacing the number in the sentence with eight, "7 times 8 minus 15 is equal to 41" which would make the equation look like this:

7 * 8 + 15 = 41

First we multiply 7 by 8:

7 * 8 = 56

Now we subtract 15 from 56:

56 - 15 = 41

Making the equation look like this:

41 = 41

Hope this helps you!!!

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2 years ago

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3 years ago

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SVETLANKA909090 [29]

Answer:

See below for answers and explanations

Step-by-step explanation:

Part A

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$\frac{f(b)-f(a)}{b-a}\\\\\frac{f(9)-f(5)}{9-5}\\\\\frac{14-(-4)}{9-5}\\ \\\frac{14+4}{4}\\ \\\frac{18}{4}\\ \\\frac{9}{2}$

Therefore, the average rate of change of $f(x)$ over the interval $[5,9]$ is $\frac{9}{2}$ .

Part B

Do the same thing as in Part A:

$\frac{f(b)-f(a)}{b-a}\\ \\\frac{f(1)-f(0.25)}{1-0.25}\\ \\\frac{2-5}{0.75}\\ \\\frac{-3}{0.75}\\ \\-4$

Therefore, the average rate of change of $g(x)$ over the interval $[0.25,1]$ is $-4$ .

Part C

To interpret our answer from Part B in terms of the real world it represents, we say that between 0.25 seconds and 1 second, the ball falls at a rate of 4 feet per second (since our average rate of change is negative).

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