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Montano1993 [528]
3 years ago
15

Ann is grouping 38 rocks. She can put them into groups of 10 rocks or as single Rocks. What are the different ways Ann can group

the rock?
Mathematics
1 answer:
vivado [14]3 years ago
8 0
Answer: 4 ways

The possible ways to do it should be:
1. 0 group of "10 rocks"  38 group of single rock
2. 1 group of "10 rocks"  28 group of single rock
3. 2 group of "10 rocks"  18 group of single rock
4. 3 group of "10 rocks"  8 group of single rock
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Answer:

The answer is b ($9.74)

Step-by-step explanation:

I got it right (:

4 0
3 years ago
Solve the system by substitution.<br> 4y =<br> 5x -10y =-50
Trava [24]

Answer:

x = -20 ; y =-5

Step-by-step explanation:

Eqn. 1 ----> 4y = x

Eqn. 2 ----> 5x-10y = -50

(Simplifying eqn.2 further)

=>5(x-2y)=-50

=>x-2y=\frac{-50}{5} =-10

(Substituting the value of x from eqn. 1)

=>4y-2y=-10

=>2y=-10

=>y =\frac{-10}{2} =-5

Now, substituting the value of y in eqn. 1 ,

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7 0
2 years ago
Carmen ran 2 laps around the track in 6 minutes. What are the unit rates in laps per minute and minutes per lap?
Ipatiy [6.2K]
1/3 of a lap per 1 minute, 3 minutes per lap 
8 0
3 years ago
Read 2 more answers
Please help me. (20 points)
alexandr402 [8]

Hello from MrBillDoesMath!

Answer:

75

Discussion:


A plane triangle has 180 degrees. Using this in the diagram gives  

x + 81 + angle BAC = 180             (***)

(The diagram is a bit fuzzy but I think the above numbers are accurate)

The diagram also shows that  (156 + angle BAC )= 180 as a straight line has 180 degrees. So

angle BAC = 180 - 156 = 24

Substituting this in (***) above gives

x + 81 + 24 = 180 =>

x + 105 = 180   =>               (as 81 + 24 = 105)

x = 180  107 = 75


Check: Does

x + 81 + angle BAC = 180   ?

75 + 81 + 24 = 180.  Yes




Thank you,

MrB

7 0
3 years ago
Leah wants to carpet a room that is 12 feet wide and 15 feet long. Carpeting is sold by the square yard. Find the length and wid
Zigmanuir [339]

Answer:

length: 5 yd

width: 4 yd

area: 20 yd^2

Step-by-step explanation:

1 yd = 3 ft

15 ft * (1 yd)/(3 ft) = 5 yd

12 ft * (1 yd)/(3 ft) = 4 yd

A = LW

A = 5 yd * 4 yd = 20 yd^2

7 0
3 years ago
Read 2 more answers
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