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2 votes
Which of the following points is a solution of y > |x| + 5?

A. (0,5)

B. (1,7)

C. (7,1)

User Craesh
by
8.4k points

2 Answers

3 votes

Answer:

B. (1,7)

Explanation:

Answer is B. (1,7)

If x = 1 then

y > 1 + 5

7 > 6

User Muhammadalive
by
8.4k points
5 votes

Answer:

(1 , 7) is a solution of y > IxI + 5 ⇒ answer B

Explanation:

* Lets revise the absolute value

- IxI = positive value

- IxI can not give negative value

- The value of x could be positive or negative

* Lets solve the problem

∵ y > IxI + 5

∴ y > x + 5 OR y > -x + 5

- Lets check the answers

∵ y > 0 + 5 ⇒ y > 5

- But y = 5, and 5 it is not greater than 5 and there is no difference

between the two cases because zero has no sign

∴ (0 , 5) not a solution

∵ y > 1 + 5 ⇒ y > 6

- Its true y = 7 and 7 is greater than 6

∵ y > -1 + 5 ⇒ y > 4

- Its true y = 7 and 7 is greater than 4

∴ (1 , 7) is a solution

∵ y > 7 + 5 ⇒ y > 12

- But y = 1 and 1 is not greater than 12

∵ y > -7 + 5 ⇒ y > -2

- Its true y = 1 and 1 is greater than -2

* we can not take this point as a solution because it is wrong

with one of the two cases

∴ (7 , 1) is not a solution

User Gmmo
by
8.2k points

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