Answer:
x= 2 and y = -4
Step-by-step explanation:
8x + 3y = 4 ---------------------------------(1)
-7x + 5y = -34 -----------------------------(2)
Multiply through equation (1) by 5 and multiply through equation(2) by 3
40x + 15y = 20 ----------------------------(3)
-21x + 15y =-102----------------------------(4)
Subtract equation (4) from equation (3)
61x = 122
Divide both-side of the equation by 61
61x/61 = 122/61
(At the left-hand side of the equation 61 will cancel-out 61 leaving us with just x, while at the left-hand side of the equation 122 will be divided by 61)
x = 122/61
x=2
Substitute x= 2 into equation (1)
8x + 3y = 4
8(2) + 3y = 4
16 + 3y = 4
Subtract 16 from both-side of the equation
16-16 + 3y = 4-16
3y = -12
Divide both-side of the equation by 3
3y/3 = -12/3
y = -4
x= 2 and y = -4
Well I only know the first one
Answer:
Ethan
Question b is incomplete
Step-by-step explanation:
Given the masses of the 6 insects below :
Name of Insect ______ Mass (m)
Arthur _____________ 7.8259
Bethan ____________ 7.2659
Clarry ______________8.159
Deena _____________ 7.4559
Ethan ______________ 8.9459
Freya ______________ 7.0159
Write the name of the stick insect with m > 8.85g
Mass (m) greater than 8.55 g
From the table :
8.945 > 8.55 ;
Hence, Ethan
(b) Write the name of the stick insect with m s 7.155 g
Question b isn't complete
Answer:
I believe the answer would be 50.714 degrees, I'm not sure how they want you to round that though.
