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Nat2105 [25]
3 years ago
8

If DF = 9x - 39, find Ef

Mathematics
1 answer:
Leviafan [203]3 years ago
4 0
|DF| = |DE| + |EF| |DF| = 9x -36 |DE| = 47 |EF| = 3x+10 Substitute: 9x - 39 = 47 + 3x + 10 9x - 39 = 3x + 57 |+39 9x = 3x + 96 |-3x 6x = 96 |:6 x = 16 Put the value of x to the equation |EF| = 3x + 10 |EF| = (3)(16) + 10 = 48 + 10 = 58 Answer: |EF| = 58

Read more at Answer.Ya.Guru – https://answer.ya.guru/questions/4046336-if-df-9x-39-find-ef.html
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10. The probability of buying pizza for dinner is 34% and the probability of buying
kipiarov [429]

Answer:

The probability of eating pizza given that a new car is bought is 0.952

Step-by-step explanation:

This kind of problem can be solved using Baye’s theorem of conditional probability.

Let A be the event of eating pizza( same as buying pizza)

while B is the event of buying a new car

P(A) = 34% = 0.34

P(B) = 15% = 15/100 = 0.15

P(B|A) = 42% = 0.42

P(B|A) = P(BnA)/P(A)

0.42 = P(BnA)/0.34

P(B n A) = 0.34 * 0.42 = 0.1428

Now, we want to calculate P(A|B)

Mathematically;

P(A|B = P(A n B)/P(B)

Kindly know that P(A n B) = P(B n A) = 0.1428

So P(A|B) = 0.1428/0.15

P(A|B) = 0.952

4 0
3 years ago
Help me please #7!!!!!!
MatroZZZ [7]

Applying parallel line postulate twice

36degree=3x degree +2y degree

126 degrees=12 x degree + 2y degree

So, the two equations are:

3x + 2y = 36

and

12x + 2y = 126

Eliminate x to solve for y

-(3x + 2y)= -(36)

-3x - 2y = -36

Combine the equations

(-3x - 2y)+ (12x + 2y) = (-36) + (126)

-3x -2y + 12x + 2y = -36 + 126

9x = 90

x = 10

Plug value of x back into to the equations to solve for y

3(10) + 2y = 36

30 + 2y = 36

2y =6

y = 3

Optional

Plug x into the other equation to check for error

12(10) +2y = 126

120 + 2y =126

2y = 6

y = 3

4 0
4 years ago
Ms. Ramo's thumb measures 4 cm. Express this length in meters
Natalija [7]

Answer: 0.04 meters

Step-by-step explanation:

Convert cm to meters by dividing the length by 100.

4/100= = 0.04

6 0
4 years ago
Read 2 more answers
Who defeated Rommel during WWII?
Firdavs [7]

Answer:

General Patton

Step-by-step explanation:

He kicked Rommel into next year. Simple as that.

5 0
3 years ago
3/10 in = 7/8 miles how many inches represent one mile?
frutty [35]
3/10:7/8=3/10*8/7=3*8/10*7=24/70=12/35

The answer is  12/35
7 0
3 years ago
Read 2 more answers
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