12x x 7y = 178 6x x 4y = 48

I don't think you can solve that, have a look and tell me if I have made a mistake. To make the explanation quicker, I have just solved for xy: 1) 12x x 7y = 84xy = 178 <- Lets call this Equation 1 2) 6x x 4y = 24xy = 48 <- Lets call this Equation 2 3) xy = 178/84 = 89/42 <- Derived from Equation 1 4) xy = 48/24 = 2 <- Derived from Equation 2 Proof 89/42 ≠ 2 Therefore this equation cannot be solved. If I made a mistake somewhere, feel free to correct me!

first question, GIMME THE TEST!!

ok here is your question what is log(568) x pi x -13! x sin(987) LIM/cos(567) x 0.34 x 294/573 x 10! x tan(678) x the first unkown variable in the quadriratic formula x5 (if x then x 10 but if any other then x5) x the perimeter of the 3,4,5 triangle divided by the hypotnuse on the 3,4,5 triangle. No calculater allowed by the way :)

wait if 0 is nothing then is 0 and real number?

0 is used in place value, so it is a number, without it we would only have: 1,2,3,4,5,6,7,8,9.

I am doing calculus as 12 is that bad?

i'm doing it at 10 so i don't think so

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Course: PISA > Unit 1

Lesson 1: PISA practice quiz

Welcome!

Q: first question, GIMME THE TEST!!

ok here is your question what is log(568) x pi x -13! x sin(987) LIM/cos(567) x 0.34 x 294/573 x 10! x tan(678) x the first unkown variable in the quadriratic formula x5 (if x then x 10 but if any other then x5) x the perimeter of the 3,4,5 triangle divided by the hypotnuse on the 3,4,5 triangle. No calculater allowed by the way :)

Q: wait if 0 is nothing then is 0 and real number?

0 is used in place value, so it is a number, without it we would only have: 1,2,3,4,5,6,7,8,9.

Q: I am doing calculus as 12 is that bad?

i'm doing it at 10 so i don't think so

Google Classroom

An overview of this lesson

Welcome!

This fun five-question quiz lets you test your mathematics skills against nearly 700,000 15-year-old students who took the most recent Programme on International Student Assessment (PISA).

Take the test and learn about how astronauts, adventurers, educators and others use mathematics every day!

Start the journey now by exploring the practice questions featured in this lesson.

Onwards!

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Arman
Posted 5 months ago. Direct link to Arman's post “12x x 7y = 178 6x x 4y =...”
12x x 7y = 178

6x x 4y = 48
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(9 votes)
Answer
- 1 Prime
  Posted 10 days ago. Direct link to 1 Prime's post “I don't think you can sol...”
  I don't think you can solve that, have a look and tell me if I have made a mistake. To make the explanation quicker, I have just solved for xy:
  
  1) 12x x 7y = 84xy = 178 <- Lets call this Equation 1
  2) 6x x 4y = 24xy = 48 <- Lets call this Equation 2
  3) xy = 178/84 = 89/42 <- Derived from Equation 1
  4) xy = 48/24 = 2 <- Derived from Equation 2
  Proof 89/42 ≠ 2
  
  Therefore this equation cannot be solved. If I made a mistake somewhere, feel free to correct me!
  Comment on 1 Prime's post “I don't think you can sol...”
  (4 votes)
Bryan Ly ツ
Posted 5 months ago. Direct link to Bryan Ly ツ's post “first question, GIMME THE...”
first question, GIMME THE TEST!!
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(7 votes)
Answer
- Arman
  Posted 5 months ago. Direct link to Arman's post “ok here is your question ...”
  ok here is your question
  
  what is log(568) x pi x -13! x sin(987) LIM/cos(567) x 0.34 x 294/573 x 10! x tan(678) x the first unkown variable in the quadriratic formula x5 (if x then x 10 but if any other then x5) x the perimeter of the 3,4,5 triangle divided by the hypotnuse on the 3,4,5 triangle. No calculater allowed by the way :)
  Comment on Arman's post “ok here is your question ...”
  (3 votes)
Dev
Posted 5 months ago. Direct link to Dev's post “#5, how good at math are ...”
#5, how good at math are the 15 year olds?
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(4 votes)
Answer
D3ATH_N0TE
Posted 4 months ago. Direct link to D3ATH_N0TE's post “wait if 0 is nothing then...”
wait if 0 is nothing then is 0 and real number?
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(4 votes)
Answer
- A.S.K.
  Posted 2 months ago. Direct link to A.S.K.'s post “0 is used in place value,...”
  0 is used in place value, so it is a number, without it we would only have: 1,2,3,4,5,6,7,8,9.
  Comment on A.S.K.'s post “0 is used in place value,...”
  (2 votes)
s.p.pubuduharsha
Posted 5 months ago. Direct link to s.p.pubuduharsha's post “Why the entire moon was n...”
Why the entire moon was not explored even though it is the closest to earth?
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(4 votes)
Answer
xavier
Posted 3 months ago. Direct link to xavier's post “what are the digits of pi”
what are the digits of pi
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(2 votes)
Answer
Inotaarav
Posted 5 months ago. Direct link to Inotaarav's post “I dont know what to type”
I dont know what to type
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(3 votes)
Answer
- CALEBG
  Posted 3 months ago. Direct link to CALEBG's post “type your math test.”
  type your math test.
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  (0 votes)
DakotaB
Posted 3 months ago. Direct link to DakotaB's post “I am doing calculus as 12...”
I am doing calculus as 12 is that bad?
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(1 vote)
Answer
- crbin mclaughlin
  Posted 3 months ago. Direct link to crbin mclaughlin's post “i'm doing it at 10 so i d...”
  i'm doing it at 10 so i don't think so
  Comment on crbin mclaughlin's post “i'm doing it at 10 so i d...”
  (2 votes)
DakotaB
Posted 12 days ago. Direct link to DakotaB's post “I just graduated high sch...”
I just graduated high school at 13. Should I go to college?
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(2 votes)
Answer
- Aadhavshanjay
  Posted 10 days ago. Direct link to Aadhavshanjay's post “no because you would need...”
  no because you would need to develop skills to be ready for that college environment. I would suggest learning more before considering college and maybe going back to school.
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  (1 vote)
322068
Posted 3 months ago. Direct link to 322068's post “Why is math important”
Why is math important
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(2 votes)
Answer