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Black_prince [1.1K]
3 years ago
9

Need math help please!!

Mathematics
1 answer:
Eva8 [605]3 years ago
8 0

Answer:

  8

Step-by-step explanation:

The fact that DE is perpendicular to AC means triangles AED and CED are congruent and side AD is equal in length to side CD.

  5x -20 = 2x +4

  3x = 24 . . . . . . . add 20-2x

  x = 8 . . . . . . . . . .divide by 3

The value of x is 8.

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What is the midpoint of the segment
Solnce55 [7]

(-3,4)(-6,-1)

The easy way

look at the y's = 4 and -1 the difference is 5 now /2 = 2.5

so the y midpoint is 2.5 from each point or 1.5

look at the x's = -3 and -6 the differebce is 3 now /2 = 1.5

so its 1.5 from each point or -4.5

so midpoint is (-4.5, 1.5) or (-9/2, 3/2)  or C


the formula way:

for x

x1+x2/2

-3+-6/2

-9/2 (which is -4.5)

for y

y1+y2/2

4+-1/2

3/2 (which is 1.5)



4 0
2 years ago
In a city school, 60% of students have blue eyes, 55% have dark hair, and 35% have blue eyes and dark hair. What is the probabil
gulaghasi [49]

Answer:

58%

Step-by-step explanation:

This is a problem of conditional probability.

Let A represent the event that student has dark hair.

So P(A) = 55% = 0.55

Let B represents the event that student has blue eyes.

So, P(B) = 60% = 0.60

Probability that student has blue eyes and dark hairs = P(A and B) = 35% = 0.35

We are to find the probability that a randomly selected student will have dark hair, given that the student has blue eyes. Using the given formula and values, we get:

P(A|B)=\frac{P(A \cap B)}{P(B)}\\\\ P(A|B)=\frac{0.35}{0.60}\\\\ P(A|B)=0.58

Therefore, there is 0.58 or 58% probability that the student will have dark hairs, given that the student has blue eyes.

5 0
3 years ago
3/4÷1/5 gffgdfdgfggdggdgdgdfgdgdgdgdgdgdgdgdfgdfgdgd ancer
AlekseyPX

Answer:

improper fraction- 15/4

Mixed number-  3  3/4

Decimal- 3.75

Step-by-step explanation:

use K.C.F (Keep Change Flip)

7 0
3 years ago
Which point on the number line indicates a number that is less than 9.1 and greater than 6.5
Dahasolnce [82]

Answer:


Step-by-step explanation:


8 0
3 years ago
​ g(x)=−20−3x h(x)=( 2 1 ​ ) x ​ Evaluate. (g\circ h) (-2)=(g∘h)(−2)=left parenthesis, g, circle, h, right parenthesis, left par
malfutka [58]

Answer:

ion

Step-by-step explanation:

6 0
2 years ago
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