Có 30 đề thi trong đó có 10 đề khó và 20 đề trung bình. tìm xác xuất để

Mathematics

1 answer:

Dimas [21]3 years ago

8 0

Answer:

translate in english i can help

Step-by-step explanation:

You might be interested in

Help me... I did it again! I skipped the practice and study guides

Katyanochek1 [597]

Answer:

X = 1 3/4

Step-by-step explanation:

Hope this helps!

4 0

2 years ago

Define perpendicular bisector

tresset_1 [31]

Answer:

Step-by-step explanation:

A perpendicular bisector is a special kind of segment, ray, or line that. (1) intersects a given segment at a 90° angle, and. (2) passes through the given segment's midpoint. Segment CD is the perpendicular bisector to segment AB. We derive two important theorems from the characteristics of perpendicular bisectors.

7 0

3 years ago

Read 2 more answers

I will give brainliest if correct !!

qwelly [4]

Answer:

acute isosceles

Step-by-step explanation:

3 0

3 years ago

Write the equation x² + 6x + y² – 8y = 19 in standard form.

kirza4 [7]

Answer:

Formula used :

x²+2xy+y² = (x+y)²
x²-2xy+y² = (x-y)²

$→{x}^{2} + 6x + {y}^{2} - 8y = 19 \\ ({x}^{2} + 2.3.x + {3}^{2} ) +({y}^{2} - 2.4.y + {4}^{2} ) = 19 + {3}^{2} + {4}^{2} \\ {(x + 3)}^{2} + {(y - 4)}^{2} = 19 + 9 + 16 \\ \boxed{ {(x + 3)}^{2} + {(y - 4)}^{2} = 44}✓$

3) (x+3)²+(y-4)²=44 is the right answer.

8 0

2 years ago

Read 2 more answers

5u − –20u − u − 18u + –11u = 10 HURRRY PLEEEEESEEEE I ONLY HAVE 4 minutes left

drek231 [11]

5u - (-20u) - u - 18u + (-11u) = 10
5u + 20u - u - 18u - 11u = 10
-5u = 10
-5(-2) = 10

So, in conclusion, X, is equal to -2.

8 0

2 years ago