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3 years ago

Hey can some one please help me !!!

Mathematics

2 answers:

natulia [17]3 years ago

6 0

1 is C- Algebraic expression: it consist of numbers and variables

2 is D- the number of times Chris washes the car

trasher [3.6K]3 years ago

5 0

1)c because it has a variable so it is an algebraic expression

2)d because 10 represents how much money he is making per wash so X must be the number of times he washes the car

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3 years ago

The sum of ages of a mother and daughter is 45 years. Five years ago, the product of their ages was four times the mother's age

icang [17]

Answer: the answer is 36

Step-by-step explanation:

we can solve this using an algebra equation

so first from the world problem, we can tell that mother and daughter's ages added together is 45 we can represent this by saying x (mother's age), plus y (daughter's age) is 45.

(x+y)=45

Then we from the problem we know that 5 years ago the product of their ages is four times the mother's age at that time. From this, we can write

(x-5)*(y-5)=4*(x-5)

Then we just subtract the common denominators which is (x-5) so then the equation becomes

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Then all we do is plug the answer for y into the very first equation

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Subtract both sides by 9

x=36

To double-check let's put the answers in the second equation

(36-5)*(9-5)=4*(x-5)

we get

(31)*(4)=4*(31)

so it's right I think

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3 years ago