Answer:
30.
Step-by-step explanation:
The total degree of a triangle is 180.
They give you 60.
The center line coming down creates a 90 degree angle.
So 60+90=150.
180-150=30.
So the top angle is 30 degrees on both sides.
Your answer is x equals 2
The answer is 8
Order of operations:(Please Excuse My Dear Aunt Sally)
Parentheses
Exponents
Multiplication
Division
Add
Subtract
When it comes down to multiplication and division you do whichever comes first , left to right same with add and subtract so..
Step1: 2 squared = 4
Step2: 4/4=1
Step3: 1x10=10
18-10=8 . Final answer is 8
Answer:
x = - 4 ± 2
Step-by-step explanation:
Given
f(x) = x² + 8x + 4
To find the zeros let f(x) = 0, that is
x² + 8x + 4 = 0 ( subtract 4 from both sides )
x² + 8x = - 4
To solve using the method of completing the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(4)x + 16 = - 4 + 16
(x + 4)² = 12 ( take the square root of both sides )
x + 4 = ± 
= ± 2 ( subtract 4 from both sides )
x = - 4 ± 2
Thus the zeros are
x = - 4 - 2 and x = - 4 + 2
Answer:
5
Step-by-step explanation:
If we call A the group that has a tablet computer and B the group that has a smartphone. In this case we can apply a formula that tells us that:
# (AUB) = #A + #B - #AnB - NoANoB
We know all these values except the one that has neither A nor B.
# (AUB) = the number of respondents, that is 117.
#A = The number of people who have a tablet, that is 81.
#B = The number of people who have a smarphone, that is, 70.
#AnB = intersection of both groups, that is, they have both, that is 29.
Replacing:
117 = 81 + 70 - 29 - NoANoB
NoANoB = 81 + 70 - 29 - 117
NoANoB = 5
Which means that 5 people have neither a tablet nor a smartphone.
