Mathematics's questions - English iziqna

Is 70 minutes an hour and 20 minutes?

18 answers · 24 hours ago


Best answer: Tell your parents and let your parents talk to the teacher and principal.


What s the square root of 9?

13 answers · 17 hours ago

Best answer: x = sqrt(2) + sqrt(17) x^2 = 2 + 2 * sqrt(2) * sqrt(17) + 17 x^2 = 19 + 2 * sqrt(34) x^2 - 19 = 2 * sqrt(34) x^4 - 38x^2 + 361 = 4 * 34 x^4 - 38x^2 + 361 = 136 x^4 - 38 * x^2 + 225 = 0 Now, if divisors of 225 can provide a solution for this polynomial, then sqrt(2) + sqrt(17) is rational. If not, then it... show more


Puzzler math question?

7 answers · 3 days ago
Start with 10,000 quarters, all “heads up” and lined up in a (long) row. Number each quarter starting from the left and working to the right (1st, 2nd, 3rd, etc…). Then carry out the following procedure: Step 1: Turn over every quarter Step 2: Turn over every second quarter (2nd, 4th, 6th,... show more

I only have a birthday every 4 years, I know 2004 was 15 years ago but would I be considered 15? since I don't have a birthday every year?



Prove that : x + yz = (x + y)(x + z)?

7 answers · 16 hours ago


Find the difference of 9 3/8 8 7/8?

13 answers · 5 days ago

If tanθ=-4/3, what is tan(4θ)?

5 answers · 4 days ago
Best answer: tan(4t) => 2 * tan(2t) / (1 - tan(2t)^2) tan(2t) => 2 * tan(t) / (1 - tan(2t)^2) => 2 * (-4/3) / (1 - (-4/3)^2) => (-8/3) / (1 - 16/9) => (-8/3) / (-7/9) => (-8/3) * (-9/7) => 72/21 => 24/7 2 * tan(2t) / (1 - tan(2t)^2) => 2 * (24/7) / (1 - (24/7)^2) => (48/7) / (1 - 576/49)... show more

Best answer: 100% is the same as 5/5. There are 5 20's in 100. So 120% is the same as 6/5. (30 x 6) / 5 = 36.

1 litre is 50ml?

14 answers · 4 days ago


F(x)=2x^3-9x+19


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