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sergiy2304 [10]
4 years ago
15

A​ multiple-choice test has five​ questions, each with five choices for the answer. only one of the choices is correct. you rand

omly guess the answer to each question. what is the probability that you answer the first two questions​ correctly?
Mathematics
1 answer:
strojnjashka [21]4 years ago
6 0

The probability is 1/5 you will answer the first question correctly.

The probability is 1/5 you will answer the second question correctly.

The probability you will answer both correctly is (1/5)·(1/5) = 1/25.

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Solve the system of linear equations by substitution.<br><br> x=2y+7<br> 3x−2y=3
Murljashka [212]
<u>The system of equation</u>
First equation
x = 2y + 7
Second equation
3x - 2y = 3

<u>Substitute x with (2y + 7) in the second equation</u>
3x - 2y = 3
3(2y + 7) - 2y = 3

use distributive property
3(2y) + 3(7) - 2y = 3
6y + 21 - 2y = 3

add like terms
6y - 2y + 21 = 3
4y = 3 - 21
4y = -18
  y = -18/4
  y = -4.5

<u>Substitute y with its value, which is -4.5, in the first equation</u>
x = 2y + 7
x = 2(-4.5) + 7
x = -9 + 7
x = -2

<u>The solution is</u>
<u />(x,y) = (-2, -4.5)
6 0
4 years ago
IS this corretct ? THANKYOU! :D WILL REWARD BRAINLIEST ANSWER!
AlladinOne [14]
No, the answers are incorrect.
When reflected over the y-axis, if the x is positive, then it becomes negative, but if the x is negative, then it becomes positive. Also, the y will not change.
The answer should be 
X prime: (0,-6)
Y prime: (10,4)
Z prime: (-3,-1)
5 0
3 years ago
Find the value of 4^2 + 6 ÷ 2
lorasvet [3.4K]

Answer:

19

Step-by-step explanation:

Follow PEMDAS

4^2 + 6 ÷ 2

16 + 6 ÷ 2

16 + 3

19

4 0
4 years ago
Read 2 more answers
What is the answer to 0.08 is 10 times as great as?
DiKsa [7]

0.08 is 10 times greater than 0.008, becase 0.008 · 10 = 0.08

3 0
3 years ago
charlene makes $10 per hour babysitting and $5 per hour gardening. She wants to make at least $80 a week, but can work no more t
swat32
10x+5y = 80
x+y <=12

Hope that this helps! 
7 0
3 years ago
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