3x + 4y = 38 ( equation 1) ----> ×5
5x - 5y = -30 ( equation 2) ----> ×3
When you multiply eqn 1 by 5 you get, 15x + 20y = 190
And when you multiply eqn 2 by 3, you get, 15x - 15y = -90
Then you solve both equations by subtracting eqn 2 from eqn 1
15x + 20y = 190
15x - 15y = 90
Then 15x - 15x gets cancelled and 20y - (-15y) gives 35y and 190 - (-90) gives 280.
So that gives 35y = 280
y = 8
And when you replace y = 8 in any of the two equations, x = 2
Since he got 24 quizes in 6 weeks that means he gets 4 every week
24/6=4
so what is 32/4=?
32/4=8
the answer is 8
Answer:
A med - A small = (36 - 16)pi inch^2
= 20 pi inch^2
Step-by-step explanation:
Area of medium pizza = 6^2 pi
Area of small pizza = 4^2 pi
A med = 36 pi inch^2
A small = 16 pi inch^2
A med - A small = (36 - 16)pi inch^2
Edited :sorry i thought that 8 and 12 where radiuses
Answer:
area = 10 units ^2
Step-by-step explanation:
rectangular area = 2x2 = 4
left side triangle area = 2x2x0.5 = 2
right side triangle area = 4x2x0.5 = 4
4+2+4 = 10
Answer:
t = -18, 18
Step-by-step explanation:
Take the square root of both sides of the equation.
... t = ±√324 = ±18
