Question about Casio DF-120TE Calculator

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Posted on Jan 02, 2017

Let's rewrite as

7(3x+5) = 8x -1(1-4x)

Let's distribute

21x + 35 = 8x -1 + 4x

collect like terms

21x + 35 = 12x -1

Put all the x's on one side by subtracting 12x from both sides

21x -12x + 35 = 12x -1 -12x

simplify

9x + 35 = -1

get all the constants on the right side

9x + 35 - 35 = -1 - 35

9x = -36

divide both sides by 9 to get x by itself

9x /9 = -36/9

x = -4

check in original equation

7(3(-4)+5) = 8(-4) -(1-4(-4))

7(-12+5) = -32 - (1+16)

7 (-7) = -32 - (17)

-49 = -32-17

-49 = -49

7(3x+5) = 8x -1(1-4x)

Let's distribute

21x + 35 = 8x -1 + 4x

collect like terms

21x + 35 = 12x -1

Put all the x's on one side by subtracting 12x from both sides

21x -12x + 35 = 12x -1 -12x

simplify

9x + 35 = -1

get all the constants on the right side

9x + 35 - 35 = -1 - 35

9x = -36

divide both sides by 9 to get x by itself

9x /9 = -36/9

x = -4

check in original equation

7(3(-4)+5) = 8(-4) -(1-4(-4))

7(-12+5) = -32 - (1+16)

7 (-7) = -32 - (17)

-49 = -32-17

-49 = -49

Jan 04, 2017 | Homework

12 times with a remainder of 138

Mar 24, 2015 | Scholastic Teaching Resources...

Then you'd better get to it.

We can't help with your homework when you don't even bother to tell us whether it's your history homework, your math homework, or what.

We can't help with your homework when you don't even bother to tell us whether it's your history homework, your math homework, or what.

May 28, 2014 | Computers & Internet

7/8

If this is homework, be sure to show your work.

If this is homework, be sure to show your work.

Dec 09, 2013 | ixl.com

(-9/3)x=-2

First simplify -9/3 to -3 : -3x=-2

Divide by -3.

x=-2/-3=2/3

First simplify -9/3 to -3 : -3x=-2

Divide by -3.

x=-2/-3=2/3

Oct 24, 2013 | Office Equipment & Supplies

http://www.amazon.com/Cluefinders-Math-Ages-9-12-VERSION/dp/B00003IELS/ref=sr_1_9?s=software&ie=UTF8&qid=1338588880&sr=1-9 7.85 also

ClueFinders Math Adventures

http://download.cnet.com/cluefinders-math-adventures/3000-2056_4-75338241.htmlPurchase; iTunes account required.; $16.99 to buy

hope it helps

ClueFinders Math Adventures

http://download.cnet.com/cluefinders-math-adventures/3000-2056_4-75338241.htmlPurchase; iTunes account required.; $16.99 to buy

hope it helps

Jun 01, 2012 | The Learning Company Clue Finders 6th...

The following are examples of expressions:

2

*x*

3 + 7

2 ×*y* + 5

2 + 6 × (4 - 2)

*z* + 3 × (8 - *z*)

Example:

Roland weighs 70 kilograms, and Mark weighs*k* kilograms. Write an expression
for their combined weight. The combined weight in kilograms of these two people
is the sum of their weights, which is 70 + *k*.

Example:

A car travels down the freeway at 55 kilometers per hour. Write an expression for the distance the car will have traveled after*h* hours. Distance equals rate
times time, so the distance traveled is equal to 55 × *h*..

Example:

There are 2000 liters of water in a swimming pool. Water is filling the pool at the rate of 100 liters per minute. Write an expression for the amount of water, in liters, in the swimming pool after*m* minutes. The amount of water added
to the pool after *m* minutes will be 100 liters per minute times *m*,
or 100 × *m*. Since we started with 2000 liters of water in the pool,
we add this to the amount of water added to the pool to get the expression 100 ×
*m *+ 2000.

To evaluate an expression at some number means we replace a variable in an expression with the number, and simplify the expression.

Example:

Evaluate the expression 4 ×*z* + 12 when *z* = 15.

We replace each occurrence of*z* with the number 15, and simplify using the
usual rules: parentheses first, then exponents, multiplication and division, then
addition and subtraction.

4 ×*z* + 12 becomes

4 × 15 + 12 =

60 + 12 =

72

Example:

Evaluate the expression (1 +*z*) × 2 + 12 ÷ 3 - *z* when
*z* = 4.

We replace each occurrence of z with the number 4, and simplify using the usual rules: parentheses first, then exponents, multiplication and division, then addition and subtraction.

(1 +*z*) × 2 + 12 ÷ 3 - *z* becomes

(1 + 4) × 2 + 12 ÷ 3 - 4 =

5 × 2 + 12 ÷ 3 - 4 =

10 + 4 - 4 =

10.

**hope that help you**

2

3 + 7

2 ×

2 + 6 × (4 - 2)

Example:

Roland weighs 70 kilograms, and Mark weighs

Example:

A car travels down the freeway at 55 kilometers per hour. Write an expression for the distance the car will have traveled after

Example:

There are 2000 liters of water in a swimming pool. Water is filling the pool at the rate of 100 liters per minute. Write an expression for the amount of water, in liters, in the swimming pool after

To evaluate an expression at some number means we replace a variable in an expression with the number, and simplify the expression.

Example:

Evaluate the expression 4 ×

We replace each occurrence of

4 ×

4 × 15 + 12 =

60 + 12 =

72

Example:

Evaluate the expression (1 +

We replace each occurrence of z with the number 4, and simplify using the usual rules: parentheses first, then exponents, multiplication and division, then addition and subtraction.

(1 +

(1 + 4) × 2 + 12 ÷ 3 - 4 =

5 × 2 + 12 ÷ 3 - 4 =

10 + 4 - 4 =

10.

Jun 22, 2011 | LeapFrog Turbo Twist Math Cartridge 5th...

61 ?

2 times 30 leaves a remainder of 1.

3 times 20 leaves a remainder of 1.

5 times 12 leaves a remainder of 1.

7 times 8 leaves a remainder of 5.

8 times 7 leaves the same remainder.

So, the numerator is a PRIME number, that cannot be "simplified".

2 times 30 leaves a remainder of 1.

3 times 20 leaves a remainder of 1.

5 times 12 leaves a remainder of 1.

7 times 8 leaves a remainder of 5.

8 times 7 leaves the same remainder.

So, the numerator is a PRIME number, that cannot be "simplified".

May 14, 2011 | The Learning Company Achieve! Math &...

Enter the fraction for example: enter 8/12.

The answer will be .666666

Then click Math (which is located under the Alpha button).

Click the ->Frac button (the first one).

It should come up as Ans->Frac.

Click Enter.

It should now read 2/3 which is 8/12 reduced.

Note: I have a TI-84 Plus Silver Edition, and the TI-84 Plus might not have this function, but that is how I do it on my TI-84 Plus Silver Edition

The answer will be .666666

Then click Math (which is located under the Alpha button).

Click the ->Frac button (the first one).

It should come up as Ans->Frac.

Click Enter.

It should now read 2/3 which is 8/12 reduced.

Note: I have a TI-84 Plus Silver Edition, and the TI-84 Plus might not have this function, but that is how I do it on my TI-84 Plus Silver Edition

Nov 08, 2008 | Office Equipment & Supplies

Yeah, there isn't a fraction button on an 84. You have to enter it manually as 4/9 or if simplifying a decimal, use the Ans>Frac under the MATH menu

Aug 26, 2008 | Texas Instruments TI-84 Plus Calculator

Aug 01, 2014 | Casio DF-120TE Calculator

Feb 05, 2014 | Casio DF-120TE Calculator

Sep 20, 2013 | Casio DF-120TE Calculator

Apr 15, 2013 | Casio DF-120TE Calculator

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