What is the answer of -1.5-0.4 X (-7),?

Question

PLz help i need this for my tuition by this friday.

Answer 1

read it like you would read a written sentence...

negitive 1.5 minus 0.4 multiplied by -7 equals.....
negitive 1.5 minus 0.4 is negitive 1.9
-1.5
-0.4
------
-1.9 (easy math, two negitive numbers remain negitive, but their totals become added to a single sum backwards.....okay that doesn't sound easy math, but it is)

-1.9 multiplied by -7 equals...

-1.9
x-7
-------
13.3 (again another easy math, mutilply 1.9 by 7 which equals 13.3 regardless, negitive times negitive cancels out, just like in addition/subtraction)

Answer 2

The actual answer is -1.22
-7 x -.04 = -.28
-1.5 - (-.28) = -1.5 + .28 = -1.22

The trick is to remember that the order of operations has to be dealt with before you can solve. See below for the order.
The easiest way to solve this yourself is to set up an excel spreadsheet with the three values 1.5, .04, and -7 in three cells A1, B1, C1.
In the fourth cell (C1) type =(-A1-B1*c1) and the answer will appear. Good luck.


The order of operations is expressed in the following chart.

exponents and roots
multiplication and division
addition and subtraction
In the absence of parentheses, do all exponents and roots first. Stacked exponents must be done from the top down. Root symbols have a bar (called vinculum) over the radicand which acts as a symbol of grouping. After taking all exponents and roots, then do all multiplication and division. Finally, do all addition and subtraction.

It is helpful to treat division as multiplication by the reciprocal and subtraction as addition of the opposite. thus 3/4 = 3 ÷ 4 = 3 • ¼ and -4 + 3 is the sum of negative four and positive three.

If an expression involves parentheses, then do the arithmetic inside the innermost pair of parentheses first, and work outward. Sometimes, the distributive law can be used to remove parentheses.


Mathematical precedence
Most programming languages conform to mathematical order of operations. The order in C-style languages is as follows:

1 () [] -> . :: ++ -- Grouping
2 ! ~ ++ -- - + * & Logical negation
3 * / % Multiplication, division, modulus
4 + - Addition and subtraction

Answer 3

The answer is surely 1.3
-1.5 -0.4 X (-7)
= -1.5 + 2.8
= 1.3

Is the answer correct? if yes, then plz. give me 10 points.

Answer 4

Navid is correct. The hierarchy of operations is multiplication/division then addition/subtraction.

Answer 5

-1.5-(0.4 X -7)=-1/5-(-2.8)= -1.5+2.8=1.3
multiply always does first

Answer 6

positive 13.3... -1.5 -.4 = -1.9

-1.9 x -7 = +13.3 Two negative numbers multiplied by each other always make a positive number.

Answer 7

the answer is 1.3... a simple trick to remember the order... PBODMAS....

Power
Brackets
O(this is just to make it sound nice)
Division
Multiplication
Addition
Subtraction

Hope this helps.. :)

Answer 8

The answer is 1.3

Answer 9

-1.5+(-0.4x-7)
-1.5+(2.8)
-1.5+2.8
=1.3