Answer:
-8 = x
Step-by-step explanation:
-15 = 2x + 1
-1 - 1 Subtract 1 from both sides
-16 = 2x Divide both sides by 2
-8 = x
To make sure this answer is correct, plug it into the equation to see if it works.
-15 = 2(-8) + 1 Multiply
-15 = -16 + 1 Add
-15 = -15
ac8×b²
Step-by-step explanation:
I need help too 12+12=24 12 ×2=24
Because you follow wherever the evidence leads you.
Answer:
a) For this case we can see the distribution in the figure attached is a bell shaped graph and symmetrical around 71
b) 
We can see the value of 76 labeled in the second picture attached
c) 
And using the z score we have this using the normal standard table or excel:

d) 
We can say that about 154 and 155 students scored higher than Angelica
Step-by-step explanation:
We know that X represent the random variable scores of knowledge test and is given by:

Part a
For this case we can see the distribution in the figure attached is a bell shaped graph and symmetrical around 71
Part b
For this case the z score is given by:

And replacing we got:

We can see the value of 76 labeled in the second picture attached
Part c
We want this probability:

And using the z score we have this using the normal standard table or excel:

Part d
For this case we can find the number desired like this:

We can say that about 154 and 155 students scored higher than Angelica
The answer to your question is 448in squared