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Mama L [17]
3 years ago
14

A triangle has sides of lengths 9, 7, and 12. Is it a right triangle? Explain.

Mathematics
1 answer:
Tresset [83]3 years ago
8 0

Answer:

No, 9^2 +7^2 \neq 12^2

Step-by-step explanation:

9^2 +7^2 = 81+ 49 =130...(1)

12^2 = 144...(2)

From equations (1) & (2) it is obvious that:

9^2 +7^2 \neq 12^2

Thus, the given is not a right triangle.

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Todd earned some money doing chores. He spent one-fourth of his money see a movie. Then he spent $6.00 on popcorn and drinks. Wh
Vsevolod [243]

Answer: Todd earned $40 mowing the neighbor's lawn.

Step-by-step explanation:

Let x represent the amount of money that Todd earned, mowing his neighbor's lawn.

He spent one-fourth of his money see a movie. It means that the amount spent in seeing a movie is x/4

Then he spent $6.00 on popcorn and drinks. It means that the total amount spent is

x/4 + 6

The amount left would be

x - (x/4 + 6) = x - x/4 - 6

When he went home, he had $24.00 left. It means that

x - x/4 - 6 = 24

x - x/4 = 24 + 6

x - x/4 = 30

Cross multiplying by 4, it becomes

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x = 120/3

x = $40

7 0
3 years ago
Kaley reads 12 1/4 pages in 1/3 hour
nikklg [1K]
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• 36.75
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3 0
3 years ago
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The population of bacteria in a petri dish doubles every 12 h. The population of the bacteria is initially 500 organisms. How lo
Alenkasestr [34]

Answer:

The answer is 8.1 h




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6 0
3 years ago
2. Find the compound interest on Rs.25, 000 after 2 years compounded
Allushta [10]

Answer:25,000 in 2 years at annual compound interest, if the rates for the successive years be 4% and 5% per annum respectively is: (1) Rs. 30,000 (2) Rs. 26,800 fa) Rs.

A=P[1+  

100

r

​  

]  

n

 

⇒  A=Rs.25,000×(  

100

106

​  

)  

3

 

⇒  25,000×  

50

53

​  

×  

50

53

​  

×  

50

53

​  

 

⇒  A=Rs.29,775.40

⇒  CI=A−P

⇒  Rs.29,775.40−Rs.25,000

∴   CompoundInterest=Rs.4775.40.

6 0
3 years ago
Round 2. 873 to the nearest tenth
PtichkaEL [24]
2.873 ≈2.9 (nearest tenth)
6 0
3 years ago
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