If 6 is subtracted from 3 times a certain number, the result is 84. Find the number.

Mathematics

2 answers:

Soloha48 [4]3 years ago

7 0

Answer:

Step-by-step explanation:

So to do this you would set up the equation $3x-6=84$ than you would add 6 to both sides so you would get $3x=90$ than you would divide 3 from both sides so $x=30$ and that is the final answer which is correct

Mazyrski [523]3 years ago

6 0

3x-6=84
3x=90
x=30
The number is 30.

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Pls help me with this

grin007 [14]

Answer:

k=8

Step-by-step explanation:

divide both sides by 11 to get nine

then subtract 1 from both sides to get

7 0

3 years ago

Could 7.7 cm, 4.0 cm, and 1.7 cm be the side lengths of a triangle?

Sedbober [7]

Triangle Inequality Theorem: States that the sum of any two sides of a triangle is greater than the length of the third side; $A+B>C\\B+C>A\\A+C>B$

So for this, we are applying the triangle inequality theorem. If any of the inequalities are not true, then this cannot be a triangle. (Let A = 7.7, B = 4.0, and C = 1.7)

$7.7+4.0>1.7\\11.7>1.7\ \textsf{(true)}\\\\4.0+1.7>7.7\\5.7>7.7\ \textsf{(false)}\\\\7.7+1.7>4.0\\9.4>4.0\ \textsf{(true)}$