What is the value of 2x to the third power+4x to the second power 3x to the second power-6x when x=3?

Answers

Answer 1

Answer: Hi! So to solve for these, all you have to do is keep PEDMAS in mind. For example, for 2x^3 (Just a fancy way of writing "to the third power") first plug in 3: 2(3)^3 and take it to the third power because E (exponent) comes before M (multiplication) in PEDMAS. You should get 2(27) which then equals 54. Hope this helps:)

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What is the value of 2x squared plus 3x - 5 when x equals negative 2

Answers

Answer: -3

Step-by-step explanation:

i used a graphing calculator

the human heart pumps 750 gallons of blood in 9 hours. A human kidney filters 100 gallons of blood in 6 hours. How many more gallons of blood does the human heart pump than a human kidney filters during a 24 hour period?

Answers

The heart pumps 750*24/9=2000 gallons, and the kidney pumps 100*24/6=400 gallons. This is a difference of 2000-400=1600 gallons.

Show each step of your work.

Solve -3x – 2 = 19.

Answers

Answer:

Step-by-step explanation:

-3x -2 = 19

+3x +3x

-2 = 19 + 3x

-19 -19

-21 = 3x

Divided by 3

-7 = x

a cube shaped box has a volume of 125 cubic inches. if the box is packed full of cubes with edge lengths of 1/3 inch how many cubes can fit along one side of the box? Show how you know

Answers

Answer: There are 3375 cubes that can be fit along one side of the box.

Step-by-step explanation:

Since we have given that

Volume of cube shaped box = 125 cubic inches

Length of small cubes = $(1)/(3)\ inch$

So, volume of small cubes would be

$a^3=((1)/(3))^3=(1)/(27)$

so, Number of cubes that can be fit along one side of the box is given by

$125/ (1)/(27)\n\n=125* 27\n\n=3375$

Hence, there are 3375 cubes that can be fit along one side of the box.

45 mph to 25mph as a fraction in lowest terms.

Answers

If you have a scientific calculator, enter in 45/25. You will get a decimal, but on some, if not most, calculators, it can convert it to fractions for you.
You will get: 9/5 mph.
Mixed number: 1 and 4/5

You have to divide 45/25 or used the calculator but if you want the answer to be as a fraction in lowest terms you have to simply 45 and 25 by 5

45 /25 divide by 5 will be= 9/5 if you simplify it again will be 1 and 4/5.

Fuel economy estimates for automobilos built in a certain yoar predicted a mean of 26.8 mpg and a standard deviation of 72 mpg for highway driving. Assume that a normal distribution can be applied. Within whatrange are 99.8% of the automobiles?