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3 years ago

75 people to 25 people

1 answer:

4 0

Percent decrease { (original number - new number) / original number....x 100

percent decrease : (75 - 25) / 75....x 100
50 / 75...x 100
0.666 x 100
66.6% decrease <==not sure if u need it rounded ?

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Helppppppp me please

STALIN [3.7K]

Given:

In $\Delta QRS, \overline{QR}\cong \overline{SQ}$ and $m\angle Q=114^\circ$ .

To find:

The $m\angle S$ .

Solution:

In $\Delta QRS$ ,

$\overline{QR}\cong \overline{SQ}$

It means the triangle QRS is an isosceles triangle. We know that the base angles of an isosceles triangle are congruent and their measures are equal.

$\angle R\cong \angle S$ [Base angles of isosceles triangle QRS]

$m\angle R=m\angle S$ ...(i)

In $\Delta QRS$ ,

$m\angle Q+m\angle R+m\angle S=180^\circ$

$m\angle Q+m\angle S+m\angle S=180^\circ$ [Using (i)]

$114^\circ+2m\angle S=180^\circ$

$2m\angle S=180^\circ-114^\circ$

$2m\angle S=66^\circ$

Divide both sides by 2.

$m\angle S=\dfrac{66^\circ}{2}$

$m\angle S=33^\circ$

Therefore, the $m\angle S$ is 33 degrees.

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