Answer:
3x + 4
Step-by-step explanation:
"the product of three and a number x" : This means you are multiplying 3 and an unknown number. Since the number is unknown, it's x!
"Four more than" : Adding 4 to the statement afterward, which is above! So it's just "+ 4"
After that, you put the two evaluated statements together, which makes your answer!
I hope this makes sense and that it helped! Have a great day c:
Since you are given a list of choices, you can go through each choice to plug them into the equations. It turns out that choice B is the answer
(3,1) means that a = 3 and b = 1
Plug in a = 3 and b = 1 into the first equation
2a - 5b = 1
2*3 - 5*1 = 1.... replace 'a' with 3, replace b with 1
6 - 5 = 1
1 = 1
we get a true equation, so we have confirmed the first equation
Do the same for the second equation
3a+5b = 14
3*3+5*1 = 14 .... replace 'a' with 3, replace b with 1
9+5 = 14
14 = 14
we get a true equation, so the second equation has been confirmed
Both equations are true when (a,b) = (3,1). So the answer (3,1) has been confirmed fully
Probability that student is taking English, P(E)=4/5
Probability that student is taking art, P(A)=2/9
Thus:
The probability that a student is taking English and Art will be:
P(A) and P(E)
=P(A∩E)
=P(A)×P(E)
=4/5×2/9
=8/45