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Pepsi [2]
3 years ago
13

Jessica is 5 years older than her sister Jenna. Jenna tells her sister that in 5 years, she will be as old as Jessica was 5 year

s ago.
If Jenna’s age is x, which equation represents the situation? How many solutions does the equation have? (Only 1 choice of answer)

A.
x + 5 = (5 − x) − 5, which has one solution

B.
x + 5 = (x + 5) − 5, which has infinitely many solutions

C.
x + 5 = (x + 5) − 5, which has no solution

D.
x + 5 = (5 − x) − 5, which has infinitely many solutions

E.
(x + 5) + 5 = (x + 5) + 5, which has infinitely many solutions
Mathematics
2 answers:
vlabodo [156]3 years ago
8 0

Answer:

x + 5 = (x + 5) - 5, which has no solution ⇒ answer C

Step-by-step explanation:

* Lets study the situation in the problem

- Jessica is 5 years older than her sister Jenna

- After five years Jenna's age will be as old as Jessica was five years ago

- Jenna's age now is x

* Lets change all information above to equation

∵ Janna's age now is x

∵ Jessica is 5 years old than Janna

∴ The age of Jessica now is x + 5

- After 5 years Janna's age will be add by 5 years

∵ Her age now is x

∴ Her age after 5 years will be x + 5

- From 5 years ago Jessica's age was her age now mins 5 years

∵ Her age now is x + 5

∴ Her age from 5 years ago is (x + 5) - 5

∵ Janna's age after 5 years = Jessica age from 5 years ago

∴ x + 5 = (x + 5) - 5

- Lets solve the equation to know how many solution

∵ x + 5 = x + 5 - 5 ⇒ add the like terms

∴ x + 5 = x ⇒ subtract x from both sides

∴ 5 = 0

- But 5 ≠ 0, the two sides of the equation not equal each other

∴ There is no solution for this equation

* The equation is x + 5 = (x + 5) - 5, which has no solution

julsineya [31]3 years ago
6 0

Answer:

C x + 5 =(5 - x) - 5

Step-by-step explanation:

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Find an equation of the line that is perpendicular to the graph of 2x+5y=5 and contains the point of intersection of the graphs
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Step-by-step explanation:

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Recycled​ CDs, Incorporated, offers a choice of 5 used CDs for ​$27​, with each additional CD costing ​$5. Write a cost function
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A function assigns the values. The cost of 6 CDs will be $32.

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

Given that the Recycled​ CDs. Incorporated, offers a choice of 5 used CDs for ​$27​, with each additional CD costing ​$5. Therefore, a cost function for purchasing 5 or more CDs, where x represents the number of CDs over 5 can be written as,

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