Answer:
I am grade 5 and I don't know about what it is at all. but please make me as the brainliest
X^2-2x-168=0(x-14)(x-12)=0x=14 or -12since we want a negative number, -12-12 -28
I believe it is 8x.
Use the formula A=1/2(b*h)
A=1/2(4x(5x-1))
A=1/2(20x-4x)
A=1/2(16x)
A=8x
There are two statements that are true: the angle at vertx D is acute and triangle DEF is a right triangle.
Answer: 10 : t = 16 11 : x = -8 13 : x = 0
Step-by-step explanation: Im sure about 10 and 11 but not too sure about 13 and explanations are too hard for me to explain