Answer:
f = -4
Step-by-step explanation:
2f-8= -16
2f = -16+8
2f = -8
f = -8/2
f = -4
Density is a property of a material which describes the mass of a material per unit volume. It can be calculated by dividing the mass of the object with its volume. We calculate as follows:
Density = mass / volume = 400 / (8^3) = 0.78125 g/cm^3
Since the whole segment is 18, we can add the 4x and 2x and set it equal to 18.
Combine like terms.
Divide both sides by 6 to isolate x:
Answer:
angle 1: 44 degrees
Angle 2: 44 degrees
Angle 3: 68 degrees
Step-by-step explanation:
since these triangles are isosceles the 2 bottom angles are equivalent
Also sup um of all three angles of a triangle equal 180 degrees
We know 2 angles of the triangle to the left and they are both 68 degrees so to find angle 1 we multiply 68 by 2 first
68x2
136
Now subtract 180 from that
180-136
44 degrees is angle 1
Angle 2 is equal to angle 1 since it’s across like that
So angle 2 is 44 degrees
And since they both are isosceles we know angle 3mis 68 degrees also since the 2 bottom angles have to be the same
Hopes this helps please mark brainliest
Answer:
0.1469
Step-by-step explanation:
Given from the question;
Mean=8.4 hrs=μ
Standard deviation=1.8 hrs=δ
Sample size, n=40
Let x=8.7
z=(x-μ)÷(δ÷√n)
Find z(8.7)
z=(8.7-8.4)÷(1.8÷√40)
z={0.3×√40}÷1.8=1.05409
z=1.0541
Read from the standard normal probabilities table
P(z>1.0541)
=0.1459