3 years ago

Write an equation to represent the following:

Mathematics

2 answers:

zlopas [31]3 years ago

7 0

1/3n-5=3 for the first one

Rudik [331]3 years ago

5 0

Answer:

Five less than 1/3 a number n is 3.

$\frac{1}{3}n-5=3$

Four more than twice a number x (2x+4) is greater than (>) the sum of three and a negative seven (3-7)

2x+4>3+(-7)

2x+4>3-7

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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

3 years ago

Read 2 more answers

I need help on this one please

zepelin [54]

Answer:

here is what i think