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ad-work [718]
3 years ago
5

In a classroom,

Mathematics
1 answer:
kobusy [5.1K]3 years ago
5 0

Answer:

3 i think.....

Step-by-step explanation:

Hope this helps

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How to solve 4n²-3n-7=0
almond37 [142]
4n^2-3n-7=0\\ \\ a=4, \ \ b=-3 \ \ c=-7\\ \\ \Delta = b^{2}-4ac = (-3)^{2}-4*4* (-7)= 9+112=121

x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{ 3-\sqrt{ 121}}{2*4}=\frac{ 3-11}{8}= \frac{-8 }{ 8}=-1 \\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} =\frac{ 3+\sqrt{ 121}}{2*4}=\frac{ 3+11}{8}= \frac{14 }{ 8}= \frac{7}{4}=1\frac{3}{4}


4 0
4 years ago
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(Can someone help I'm taking a math quiz.) Seventy parents showed up for a parent meeting at school. Mrs. Quinn set up 12 tables
il63 [147K]

Answer:

for every 2 tables there are 10 chairs, so for 12 tables there are 60 chairs

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3 years ago
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5. Kalen is trying to find the average of three measurements. The measurements are 13.8, 15.64, and 22.51. He adds the
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Answer:

if rounding by tenths 17.3 i’d rounding by hundredths 17.31 and thousandths 17.316

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most teachers say but off is thousandths be careful look what it’s asking for exactly

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4 years ago
Look at each situation. Is it represented by the equation -3 + 3 = 0? Determine yes or no for each. If NO, explain why not.**
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6 0
3 years ago
Help, No links please!!!!!!
jolli1 [7]

Answer:

I think 60 because say u do 2×3 you get 6 but do 20×3 and it's 60 so I think it's 60 so sorry if I'm wrong.

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3 years ago
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