Answer:
x=−9 and y=−2
Step-by-step explanation:
Multiply the first equation by 2,and multiply the second equation by -5.
2(1/3x−y=−1)
−5(1/5x−2/5y=−1)
Becomes: 2/3x−2y=−2
−x+2y=5
Add these equations to eliminate y:
−1/3 x=3
Then solve −1/3x=3 for x:
−1/3x 3
−1/3 = −1/3
(Divide both sides by (-1)/3)
x=−9
Now that we've found x let's plug it back in to solve for y.
Write down an original equation:
1/3x−y=−1
Substitute−9 for x in 1/3x−y=−1:
1/3(−9)−y=−1
−y−3=−1(Simplify both sides of the equation)
−y−3+3=−1+3(Add 3 to both sides)
−y=2
−y
−1=
2
−1
(Divide both sides by -1)
y=−2
4,2
Im pretty sure that’s right
Answer:
D) 5
Step-by-step explanation:
Using cosine law
b² = 10² + 12² - 2(10)(12)cos(24)
b² = 24.74909017
b = 4.974845743
ANSWER
a. 6
EXPLANATION
On a dot plot , we use dots to represent frequencies.
The frequency 6, is represented by 6 dots.
The frequency 7, is represented by 7 dots.
The frequency 9, is represented by 9 dots.
The frequency 8, is represented by 8 dots.
The smallest number of dots is represented by 6.
Answer: 17/60 = 0.283333333333
25/60 = 0.416666666667
54/72 = 0.75
31/44 = 0.704545454545
Step-by-step explanation: