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Liula [17]
3 years ago
12

Susan solved 200-91 and decided o add her answer to 91 to check her work. Explain why this strategy works

Mathematics
2 answers:
Finger [1]3 years ago
6 0
This strategy works because you would want to make sure that the two numbers add up to the number you subtracted it from. Hope this helped and have an awesome day!
kaheart [24]3 years ago
4 0
109+91=200 it works because of the missing number is now placed in the equation
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Step-by-step explanation:

3 0
3 years ago
2x+3y=10<br> -6x-9y=30<br> elmantation method
Assoli18 [71]

Answer:

• First assign any label to the equations:

{ \tt{2x + 3y = 10 -  -  -  \{eqution \: (a) \}}} \\ { \tt{ - 6x - 9y = 30 -  -  -  \{equation \: (b) \}}} \\

• Multiply equation (a) by 3

\dashrightarrow \: { \tt{3 \times (2x + 3y = 10)}} \\  \dashrightarrow \: { \tt{6x + 9y = 30}}

• Sum up the result with equation (b)

{ \underline{ + { \tt{ \binom{6x + 9y = 30}{ - 6x - 9y = 30} }}}} \\ { \tt{0x + 0y = 60}}

Answers:

No solutions

5 0
2 years ago
11. Macy has a circular pool with a diameter of 18 feet. If she swims around the pool 4 times, find the distance she will travel
Paul [167]

Answer:

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Step-by-step explanation:

To solve this, first find the circumference of the pool: \pi * diameter or in this case 56.52. Now mutiply by 4 to get the answer of 226.08.

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3 years ago
Solve for x by factoring X2-2x=35
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4 years ago
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