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Oksana_A [137]
2 years ago
9

What system of equations would you use to solve the problem below?

Mathematics
1 answer:
EleoNora [17]2 years ago
4 0

Let x be multiple-choice questions
Let y be short-answer questions

x + y = 28

3x + 5y = 100

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a cashier has a total of 26 bills made up of tens and hundreds the total value is 1610 how many hundreds and tens does she have?
jeyben [28]
Let the tens be x.

Therefore the hundreds will be (26 - x).      

Since they both total to 26. x  + (26 - x) = 26

10*x + 100*(26 - x) = 1610

10x  + 2600 - 100x = 1610

10x - 100x = 1610 - 2600

-90x = -990

x = -990/-90

x = 11.

So the 10s are x =11,   the 100s  are (26 -11) = 15

11 tens bills and 15 hundred bills.
5 0
3 years ago
Answer and get 22 pts be named brainliest and get a thank you.
bazaltina [42]

Option c 71 3/4

Step-by-step explanation:

Step 1 :

The area of a rectangle is length * breadth

Step 2 :

Given length = 15 3/8 = 123/8  (converting mixed fractions into improper fractions)

  Breadth = 4 2/3 = 14/3

Step 3 :

 Hence the area of the rectangle = length * breadth

                = 123/8 * 14/3 = 1722/24 = 71 3/4 (converting improper fractions into mixed fractions)

4 0
3 years ago
Leora wants to paint the nursery in her house. The nursery is an 8–by–10–foot rectangle, and the ceiling is 10 feet tall. There
tatuchka [14]

Answer:

The correct answer is - 242 ft^2

Step-by-step explanation:

Given:

one door : 3*6.5 => 19.5 ft^2

other door: 3*6.5 => 19.5 ft^2

a window: 2*3.5 => 7 ft^2

total =       46 ft^2

area of all four walls: 2h (l+b)

= 2(8) (10+8)

= 16 (18)

= 288 ft^2

paint required excluding doors and window:

=> area of your wall - (area of doors and window)

=> 288 - 46

= 242 ft^2

4 0
3 years ago
What percent is 3 out of 70
koban [17]
3/70=x/100
(3/70)*100=x
300/70=x
x=30/7=4.2857 roughly
8 0
3 years ago
K ( n ) = | n + 1 | − 1 ; Find k ( 4 )
PSYCHO15rus [73]

Answer:

4

Step-by-step explanation:

6 0
3 years ago
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