(3a - 2)(4a + 5) = 12a^2 + 15a - 8a -10 = 12a^2 + 7a - 10
Answer:
0.5 probability of pressing the button that doesn't work GIVEN that no candy is received.
Step-by-step explanation:
1) The probability of pushing the button that never works: 1/10 = 0.1
2) The probability of pushing one of the buttons that work half the time:
2/10 = 0.2
The probability of (2) not working = 0.5
Overall probability of (2) pressed and not working = 0.5 * 0.2 = 0.1
Probability of non working button being pushed GIVEN no candy is received will be: 0.1 / (0.1+0.1) = 0.1/0.2 = 0.5
Answer:
{y,x} = {0,4}
Step-by-step explanation:
// Solve equation [2] for the variable y
[2] y = 2x - 8
// Plug this in for variable y in equation [1]
[1] (2x-8) + x = 4
[1] 3x = 12
// Solve equation [1] for the variable x
[1] 3x = 12
[1] x = 4
// By now we know this much :
y = 2x-8
x = 4
// Use the x value to solve for y
y = 2(4)-8 = 0
Answer:
343
Step-by-step explanation:
7 to the exponenet of 3 is multiply 7 3 times so 7*7*7 is what it looks like simplified because there are 3 7's.
Remember that percent means parts out of 100 so
x%=x/100
the easier way is to convert fractions to percent by making the bottom number 100 so
4/5 times 20/20=80/100=80%
so the equation is really
-80%-137.5%-20%=-237.5%