3n/7=24 multiply both sides by 7

3n=168 divide both sides by 3

n=56

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Personally, learning the material in any way possible is a good thing to me.

4 0

3 years ago

What number replaces the Δ?

OleMash [197]

1 + 3 = Δ + 3

By comparing

Δ = 1.

Option A.

3 0

3 years ago

Help please? .....................

Ksenya-84 [330]

$2x^2+6x-10=x^2+6\qquad\text{subtract}\ x^2\ \text{and 6 from both sides}\\\\x^2+6x-16=0\\\\x^2+8x-2x-16=0\\\\x(x+8)-2(x+8)=0\\\\(x+8)(x-2)=0\iff x+8=0\ \vee\ x-2=0\\\\x+8=0\qquad\text{subtract 8 from both sides}\\\boxed{x=-8}\\\\x-2=0\qquad\text{add 2 to both sides}\\\boxed{x=2}\\\\Answer:\ \boxed{B.\ -8\ and\ C.\ 2}$

8 0

4 years ago