Rewrite 0.6+(-1)-(-0.8)-0.4=0

Mathematics

1 answer:

maria [59]3 years ago

7 0

Answer:

LHS = RHS

Step-by-step explanation:

Given: 0.6 + (-1) - (- 0. 8) - 0. 4 = 0

RHS = 0

We will compute LHS now.

We can re write the question as follows:

= 0. 6 - 1 + 0. 8 - 0. 4

We use BODMAS (Bracket, Of, Division, Multiplication, Addition, Subtraction) to solve further.

So, we add the terms first.

= 0. 6 + 0. 8 - 1 - 0. 4

= 1 . 4 - (1 + 0. 4)

= 1. 4 - 1 . 4

= 0

∴ LHS = 0

This matches with the given question.

LHS = RHS

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At a greengrocer, two bananas and one apple cost ?1.16 and one banana and one apple cost ?0.71. How much does one apple cost?

Blababa [14]

Answer

Find out the how much does one apple cost .

To prove

Let us assume that the number of bananas be x .

Let us assume that the number of apples be y .

As given

At a greengrocer, two bananas and one apple cost $1.16 .

Than the equation becomes

2x + y = 1.16

one banana and one apple cost $0.71.

Than the equation becomes

x + y = 0.71

Subtracting x + y = 0.71 from 2x + y = 1.16

2x - x + y - y = 1.16 - 0.71

x = 0.45

Put in the equation x + y = 0.71

0.45 + y = 0.71

y = 0.71 - 0.45

y = $0.26

Therefore the cost of the one apple is $0.26 .

4 0

3 years ago

BRAINLY FOR THE FASTEST WITH GOOD EXPLANATIONS

Neporo4naja [7]

So, when we're tasked with things like this, rewriting everything in terms of sine and cosine and combining fractions often trivializes things, so doing just that gives us:

$\frac{\frac{1}{\cos{x}}-\frac{1}{\sin{x}}}{\frac{\cos{x}}{\sin{x}}-1}= \\\frac{\frac{=(\cos{x}-\sin{x})}{\cos{x}\sin{x}}}{\frac{\cos{x}}{\sin{x}}-\frac{\sin{x}}{\sin{x}}}=\\\frac{-(\cos{x}-\sin{x})}{\cos{x}\sin{x}}*\frac{\sin{x}}{\cos{x}-\sin{x}}=\\-\frac{1}{\cos{x}}$