A person has $1 bills and $5 bills. She has $108 from 32 total bills. Find the number of $1 bills and $5 bills that she has.

Mathematics

1 answer:

Radda [10]3 years ago

4 0

21 5 dollar bills
86. 1 dollar bills

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The sum of two number is 42 and it's different is a 8. find the number?

NeTakaya

Answer: 17 and 25

Step-by-step explanation:

Let X and Y be the two numbers.

---------------

X + Y = 42 [sum of two numbers is 42]

X - Y = 8 [their difference is 8]

-------------------

Rearrange the last equation to

X = 8 + Y

Now enter that into the 1st equation:

X + Y = 42

(8+Y) + Y = 42

2Y = 34

Y = 17

Since X - Y = 8,

X = 8 + 17

X = 25

===

X + Y = ?

17 + 25 = 42 Checks

X - Y = ?

25 - 17 = 8 Checks

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Answer:

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2 years ago

Simplify using PEMDAS (3X + 2x)(3+4)

katrin [286]

Answer:

$5x*7$

Step-by-step explanation:

We know that PEMDAS is a shortened acronym for the order in which we do operations in an expression, which is as following in the correct order:

Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction.

Now your question asks you to solve the expression using PEMDAS, however that is what we would do regardless as in algebra PEMDAS is always in effect.

Lets break it down! $(3x+2x)*(3+4)$