The answer is 200 because you multiply 20x12 you get 200
Answer:
<u>x= -7 , y= 9</u>
Steps:
4x+3y=-1
5x+4y=1
First, multiply the top equations by -5, and the bottom by 4 to get :
-20x-15y=5
20x+16y=4
Then, you’re going to add the two equations with them being on top of each other so you can easily see what cancels out :
-20x-15y=5
+ 20x+16y=4
———————
0+1y=9
From this, you get :
y=9
Now that you have one variable, find x by substituting 9 for y in one of the equations, I choose :
4x+3y=-1
So :
4x+3(9)=-1
Then simplify by multiplying 3 and 9 :
4x+27=-1
Then subtract 27 on each side :
4x=-28
Then, divide by 4 to get that :
x= -7
Hope this helps!!
Answer:120
Step-by-step explanation:
because the triangle is a right angel which is 30 multiplied by 40 is 120its like 3 by 4 12 just add a 0
Answer:
5
Step-by-step explanation:
Find the z-scores.
z = (x − μ) / σ
z₁ = (92 − 82) / 5
z₁ = 2
z₁ = (97 − 82) / 5
z₂ = 3
Find the probability:
P(92 < X < 97)
P(2 < Z < 3)
P(Z < 3) − P(Z < 2)
0.9987 − 0.9772
0.0215
Find the number of tests:
0.0215 (241) ≈ 5
Answer: 6
Step-by-step explanation: