Simplify the expression: thanks

Mathematics

2 answers:

Vadim26 [7]3 years ago

8 0

Answer:

Step-by-step explanation:

$40$ ÷ $(-10 + 5) + 18 - 10$

$40$ ÷ $-5 + 18 - 10$

$-8 + 18 - 10$

$10 - 10$

$0$

kobusy [5.1K]3 years ago

3 0

Answer: 0

Step-by-step explanation:

Make sure to follow PEMDAS. The first thing to do is solve what is inside the parenthesis. -10+5 is equal to -5. Now what you need to do is divide 40 by -5, as the next thing on the list is division. 40/-5 is equal to -8. -8+18 is equal to 10. 10-10 is equal to zero.

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How do you do this problem?

soldi70 [24.7K]

You make use of the given relationships to write an equation only involving "a".

... a = (sum of three numbers) × (1 + 0.25) . . . . a is 25% more than the sum of three numbers.

Then

... (sum of three numbers) = a/1.25 = 0.8a

The sum of the three numbers and a is given as 783.

... sum of 4 numbers = (sum of three numbers) + a

... 783 = 0.8a + a = 1.8a

... 783/1.8 = a = 435

The appropriate selection is (B) 435.