How do i do these math problems?

Question

1. Approximate value to three decimal places using calculator
√62
3
√-15
5√18.2

Answer 1

7.874
1.73
3.873i
21.331

I'm assuming when you said 3 you meant the square root of 3. If you type a math problem into www.google.com it will solve it for you. The catch you have to word it correctly. So that might help you with word problems
Example search for "5 times the square root of 18.2 equals"

Using a basic calculator(not HP which can use reverse polish notation) you'd type the same thing like this 18.2 then press square root then press X 5 and you'd get the answer.

Answer 2

Depends on your calculator.

However, here is the principle:
√ is a "square root" meaning a number which, when multiplied by itself, gives the original number.

√62 means the number which, when multiplied by itself, will give 62.

Some calculators will want you to press a key marked √ then press the numbers 6 2 then the equal sign.
Other calculators will want you to put in the numbers 6 2 then the √ key.
Others will want you to enter 62, then press the y^x key (a y with a smaller x exponent) then you enter 0.5 (taking a square root is the same as "power one-half".

If you have a very cheap calculator, you may have to use a trial and error method.

pick a number close to the result (e.g., 8*8=64 so begin with 7.9)

7.9 times 7.9 = 62.42 too big
7.8 times 7.8 = 60.84 too small
7.85 times 7.85 = 61.6225 too small
7.87 times 7.87 = 61.9369 still too small
7.88 times 7.88 = 62.0944 too big
7.875 * 7.875 = 62.015625 still too big
7.874 * 7.874 = 61.999876 almost there
and so on.

for the last problem, solve the root first, then multiply by 15.

In real numbers, you cannot multiply a number by itself and get a negative answer. Therefore, the root of a negative number cannot exist.
Mathematicians have invented an extended system called "complex numbers" where the letter i replaces the square root of -1.
If your problem is in real numbers, you simply say: "no answer"

If in complex numbers, use:
√-15 = √15*√-1 = √15*i = approx. 3.873 i

PS: Please note that skymei20 is not asking for the answers but rather for how to do the problem on a calculator.

Answer 3

-7= 3x-8 at the same time as putting -8 to the different aspect of equation, the signal will substitute, so that is -7+8= 3x which means a million=3x hence x= a million/3 and don't be disturbed about the order, it would not count number! there's a rule in math about the order! you are able to quite examine it through substituting a million/3 into the equation i.e -7= 3*a million/3-8 -7=-7!!!

Answer 4

You should take some time off of the computer and spend a little more time solving your own problems instead of having someone else solve them. You can learn more that way!

Answer 5

if the answer is 23.0007 your approximation would be rounded to 23.001. The third least significant digit is rounded up from .000 to ,001 because of the .0007

Answer 6

its square root...you go on the calculator and you press the number and then the sign

Answer 7

im gueessing the check thing is like N so n x 62 and then you have 3 so wait r those all seprate questions??

Answer 8

push the square root button then punch in the number after.

Answer 9

Gordon Bennett!!!

the 3rd one is not real btw

Answer 10

i will ask my son later if you still dont know