Explain how you could determine whether a calculator correctly performs the order of operations

Answers

Answer 1

Answer:

Answer:

" We can determine whether a calculator correctly performs the order of operations with the help of considering a simple example and solve it manually as well calculate the value in calculator and check whether it holds true.

If the calculator shows same value as we have calculated manually than calculator will calculate it for complex problems as well "

EXAMPLE:

We will use the PEDMAS (i.e. first solve the paranthases than solve for exponent, then for multiplication then division, then for addition and subtraction) rule to calculate our problem:

Consider our problem as:

$(5+3)^2-15/ 3+5$

firstly we will calculate it Manually as:

$(5+3)^2-15/ 3+5\n\n=(8)^2-15/ 3+5\n\n=64-15/ 3+5\n\n=64-5+5\n\n=64+0\n\n=64$

also when we will calculate it by calculator we get:

$(5+3)^2-15/ 3+5=64$

Hence, the calculator does the correct calculations.

Hence this type of calculator will be reliable.

Answer 2

Answer: You can check behind the calculator and do the math your self, this will let you know if the calculator is correctly doing the order of operations.

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The figure shown is made up of triangle ABF and rectangle BCDE. The area of the figure is 90 square feet. If AB=BC=BF=FE, find AC

Answers

the complete question in the attached figure

let
x-----> distance AB
so
AC=2x

we know that
area of the figure=area of triangle+area of rectangle
area of the figure=90 ft²

step 1
find the area of triangle
$A=b*h/2$
b=x
h=x
so
$A=(x*x)/2$
Area of triangle=x²/2 ft²

step 2
find the area of rectangle
$A=b*h$
b=2x
h=x
$A=(2x)*x------\ \textgreater \ A=2x^(2)$
area rectangle=2x²

step 3
find value of x
area of the figure=(x²/2)+2x²
area of the figure=90 ft²
90=(x²/2)+2x²-----> multiply by 2 both sides----> 180=x²+4x²
5x²=180-----> x²=36-----> x=6 ft

AC=2x-----> AC=2*6----> AC=12 ft

the answer is
AC=12 ft

What is 3x^2-2n-5=0
please help me!!!

Answers

The answer to your question is:
It is a quadratic equation in 'x', with 'n' mistakenly typed in the second term..

Although you didn't ask for the solutions to the equation, I'm already here
so I might as well go through it and find them:

3x² - 2x - 5 = 0

In terms of the generic quadratic formula:
A = 3
B = -2
C = -5

Plug those into the quadratic formula, and you discover that

x = -1
and
x = ⁵/₃

$3x^2-2x-5=0$

$(3x-5)(x+1) = 0$

$3x-5=0$

$3x=5$

$x= (5)/(3)$

$x+1 =0$

$x=-1$

$x=-1, (5)/(3)$

During a rainstorm, Ivan collected 605 milliliters of water. Which measure is closest to this volume in liters?

Answers

1 mL = .001 L.

605 mL is also equal to .605 L.

Can u Simplify this problem???!? 3t-7t+14t

Answers

Come on now, Tayala !

What if I say to you:
"Start with 3 cows, take away 7 cows, and then add 14 cows. How many are there ?"

Don't let the little 't' scare you. It doesn't matter one bit what 't' really is. It can be
a number, a teacher, a tiger, or a teacup. Whatever it is, you start with 3 of them,
take away 7 of them, and then add on 14 of them. How many are there ?

Hint: If there are not ten of them, then go back and look at the cows again.

$3t-7t+14t=\n \n -4t+14t=10t$