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4 years ago

What is one reason why we add and subtract decimals

Mathematics

2 answers:

NemiM [27]4 years ago

5 0

Because if you did not you would not have a exact answer.

Contact [7]4 years ago

5 0

Since dollars and cents are typically written as decimals, you often need to work with decimals. Knowing how to add and subtract decimal numbers is essential when you deposit money to (and withdraw money from) your bank account; perform an incorrect calculation, and you may be costing yourself some cash.

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Can someone please help me with the question, a/4 = 15/12 a=?

malfutka [58]

Answer:

a = 5

Step-by-step explanation:

a/4 = 15/12

We can use cross products to solve

a* 12 = 4*15

12a = 60

Divide each side by 12

12a/12 = 60/12

a =5

7 0

3 years ago

Read 2 more answers

What is the average rate of change for this exponential function for the interval from x = 2 to x = 4?

Hunter-Best [27]

Answer:

The average rate of change over the interval is 120

Step-by-step explanation:

For a function f(x) the average rate of change over an interval [a,b] is given as;

f(b)-f(a)/b-a

in this case, a is 2 and b is 4

f(b) is 256 and f(a) is 16

Substituting these values in the equation for rate of change, we have;

(256-16)/(4-2) = 240/2 = 120

8 0

3 years ago

The figure below is the graph of the dimensions of a rectangle whose adjacent side lengths exhibit inverse variation.

cricket20 [7]

Answer:

The answer is true just answered

6 0

3 years ago

Read 2 more answers

Write a 4 digit number that has no zeroes and is divisible by 5 and 9

Hunter-Best [27]

Answer:

7,515

Step-by-step explanation:

8 0

3 years ago

Hi, am I supposed to find the stationary points of the f(x) and g(x) then use the distance formula to solve for the final answer

nikdorinn [45]

9514 1404 393

Answer:

maximum difference is 38 at x = -3

Step-by-step explanation:

This is nicely solved by a graphing calculator, which can plot the difference between the functions. The attached shows the maximum difference on the given interval is 38 at x = -3.

Ordinarily, the distance between curves is measured vertically. Here that means you're interested in finding the stationary points of the difference between the functions, along with that difference at the ends of the interval. The maximum difference magnitude is what you're interested in.

h(x) = g(x) -f(x) = (2x³ +5x² -15x) -(x³ +3x² -2) = x³ +2x² -15x +2

Then the derivative is ...

h'(x) = 3x² +4x -15 = (x +3)(3x -5)

This has zeros (stationary points) at x = -3 and x = 5/3. The values of h(x) of concern are those at x=-5, -3, 5/3, 3. These are shown in the attached table.

The maximum difference between f(x) and g(x) is 38 at x = -3.

4 0

3 years ago