What is the value of t?

C.) y=x2 + 4x - 1 a= b = c. Vertex Axis of Symmetry:

Savatey [412]

Answer:

a=1

b=4

c=-1

Axis of cemetry and vertex:x=-2

Step-by-step explanation:

x=-b/2a

x=-4/2(1)

x=-2

3 0

4 years ago

The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5. What proportion of weeks would you exp

julia-pushkina [17]

Answer:

0.17619

Step-by-step explanation:

We solve using z score formula

= z = (x-μ)/σ,

where x is the raw score = 5 accidents

μ is the population mean = 6.4 accidents

σ is the population standard deviation = 1.5

z = 5 - 6.4/1.5

= -1.4/1.5

= -0.93333

Approximately to 2 decimal places = -0.93

Determining the probability value from Z-Table:

P(x< 5) = P(z = -0.93) = 0.17619

Converting this to percentage =

The probability of weeks you would expect to have less than 5 accidents is

0.17619

We are asked in the question:

What proportion of weeks would you expect to have less than 5 accidents?

Proportion is also the same as:

Therefore, the proportion of weeks that you expect to have less than 5 accidents = 0.17619

3 0

4 years ago

PLEASE UELP IF YOU CAN DO THESE TWO. YOU WILL RECOVE BRAINLIST

sergeinik [125]

Answer:

See the answers below.

Step-by-step explanation:

An exponential model is the best representation of the given model.

$f(t) = 500(0.5)^{\frac{t}{10}}$ (where t is given in minutes)

$f(120) = 500(0.5)^{\frac{120}{10}}\\\\=0.12\:g$

Best Regards!

7 0

3 years ago

Please help me out it would be greatly appreciated

Dmitry_Shevchenko [17]

The area of the given parallelogram is 120.

Step-by-step explanation:

Step 1:

The parameters needed to determine the area of a parallelogram are the base length and height.

The base length of this parallelogram is 15 inches while its height is 8 inches.

The area of a rectangle is determined by multiplying the base length with the height.

Step 2:

The area of the parallelogram $= (b)(h).$

Here the base length is 15 inches and the height is 8 inches.

The area of the parallelogram $=(15)(8) = 120.$

So the area of the given parallelogram is 120.

5 0

3 years ago

Find the equation of the exponential function represented by the table below:

kondor19780726 [428]

Answer:

y = 0.2(0.5)^x

Step-by-step explanation:

Exponential function are of the form

y = ab^x

----------------------

To find "a" plug in x = 0 y = 0.2

0.2 = a(0.2)^0

0.2 = a

-------------------------

To find "b" plug in another point and a = 0.2

using x = 2, b = 0.05

0.05 = 0.2b^2

Divide both sides by 0.20

.25 = b^2

Take the square root of both sides

0.5 = b

-----------------------------

With a = 0.2 and b = 0.5 the equation becomes

y = 0.2(0.5)^x

8 0

3 years ago