Can someone help? Need to find x, and measure of angle DEF

Mathematics

1 answer:

Leni [432]3 years ago

6 0

Step-by-step explanation:

(x+20)=9x

4x=20

x= 5°

because GEF AND DEG ARE EQUAL

THEN DEF= 2 * GEF

DEF = (9*5)*2=90

DEF= 90°

You might be interested in

23 times 58 divied by 23 minus 8 plus 5 times 1 dived by 7

cricket20 [7]

Answer:

355/7

50.7...

6 0

3 years ago

Read 2 more answers

Zachary says that the equation 0 =-1/2 (x – 4)(x –

melomori [17]

Answer:
c = 4

Explanation:
The number of solutions for any equation is equal to the degree of the equation.

The given equation is a second degree equation which means that it has two solutions.

The only possible way for it to have one unique real solution is that the two solutions are equal

This means that:
x - 4 = x - c
Now, we solve for c:
x - 4 - x = x - c - x
-4 = -c
c = 4

Hope this helps :)

6 0

3 years ago

Read 2 more answers

What are the solutions if the equation x^2+4x+4=25

tatiyna

$\text{Use}\ (a+b)^2=a^2+2ab+b^2\\\\x^2+4x+4=25\\\\x^2+2(2)(x)+2^2=25\\\\(x+2)^2=25\iff x+2=\pm\sqrt{25}\\\\x+2=-5\ \vee\ x+2=5\qquad\text{subtract 2 from both sides}\\\\\boxed{x=-7\ \vee\ x=3}$

Other method:

$x^2+4x+4=25\qquad\text{subtracr 25 from both sides}\\\\x^2+4x-21=0\\\\x^2+7x-3x-21=0\\\\x(x+7)-3(x+7)=0\\\\(x+7)(x-3)=0\iff x+7=0\ \vee\ x-3=0\\\\x+7=0\qquad\text{subtract 7 from both sides}\\\boxed{x=-7}\\\\x-3=0\qquad\text{add 3 to both sides}\\\boxed{x=3}$