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True [87]
2 years ago
5

I really need help on this!!! Someone please help?

Mathematics
2 answers:
Bond [772]2 years ago
5 0

Answer:

x= 3, y= -5

Step-by-step explanation:

siniylev [52]2 years ago
3 0

Answer:

(3,-4)

Step-by-step explanation:

or x = 3, y = -5

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A psychologist thinks that listening to Mozart helps people think. She gives subjects a set of puzzles and measure how many they
BigorU [14]

Answer: 0.8

Step-by-step explanation:

Let's assume that 5 puzzles were solved in 5mins. That is, 1min for each puzzle to be solved.

From our assumption, our sample size will be 5.

The probability that a subject will solve more than 1 puzzle will be number of occurrence from 2 to 5 which is 4.

This gives: 4/5 = 0.8 to one decimal place.

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4 years ago
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7 0
3 years ago
Sum10and product of 9​
AVprozaik [17]

Answer:

x+ y = 10  ---(1)\\ x\cdot y = 9 ---(2)\\\\from(2) \ y  = \frac{9}{x}\\\\substitute \ y \ in (1) \\x +  \frac{9}{x} = 10\\\\x^2 + 9 - 10x = 0\\x^2 -10x + 9 = 0\\x^2 -9x -x +9 = 0\\x(x-9)-1(x-9)=0\\(x-1)(x-9)=0\\x = 1 \ or \ 9\\

substitute x in y = 9/x

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6 0
3 years ago
Find the surface area of the triangular prism (above) using its net (below).
r-ruslan [8.4K]

Answer:

96 square units

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  Please have a look at the attached photo.

My answer:

  • The length of the large rectangle is: 5
  • The width of the large rectangle is: 7

=> Area of the large rectangle = length × width  = 7*5 = 35 square units

  • The length of the middle rectangle is: 7
  • The width of the middle rectangle is: 4

=> Area of the middle rectangle = length × width  = 7*4 = 28 square units

  • The length of the small rectangle is: 7
  • The width of the small rectangle is: 3            

=> Area of the small rectangle = length × width  = 7*3 = 21 square units

Area of top and the bottom triangles =2* \frac{1}{2}bh  = 4*3 =12  

Total surface area = 35 + 28 + 21 + 12 = 96 square units

3 0
4 years ago
Read 2 more answers
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