All categories

2 years ago

When x=1/2, what is the value of 8x-3 over x?

Mathematics

2 answers:

leonid [27]2 years ago

8 0

Answer:

Step-by-step explanation:

$\begin{array}{rcl}f(x) & = & \dfrac{8x - 3}{x}\\\\f(\frac{1}{2}) & = & \dfrac{8(\frac{1}{2} - 3)}{x}\\\\ & = & \dfrac{4 - 3}{\frac{1}{2}}\\\\ & = & 1 \times 2\\& = & \mathbf{2}\\\end{array}$

IgorLugansk [536]2 years ago

5 0

Answer:

Step-by-step explanation:

(8(1/2)-3)/(1/2)

(4-3)/(1/2)

1/(1/2)

1*2

Your answer is 2, hope this helps

You might be interested in

One warehouse had 185 tons of coal, another one had 237 tons. The first warehouse delivered 15 tons of coal to its clients daily

LenKa [72]

Hello Archanavrane75p56yu7

The answer to this problem would be 9 days for the second warehouse if 1.5 times than the first one.

P.S (Dont cry)

7 0

2 years ago

Which graph represents the solution?

marusya05 [52]

Answer:

Step-by-step explanation:

Given the inequality :

v + 4 > 2 and 8v - 20 < 36

v + 4 > 2

v > 2 - 4

V > - 2

8v - 20 < 36

8v < 36 + 20

8v < 56

v < 56/8

v < 7

Hence,

v > - 2 and v < 7

-2 < v < 7

7 0

2 years ago

You measure 47 backpacks' weights, and find they have a mean weight of 79 ounces. Assume the population standard deviation is 13

ki77a [65]

Answer:

3.14

Step-by-step explanation:

Given that:

Mean weight (m) = 79 ounces

Population standard deviation (s) = 13.1

Sample size = 47

Maximal margin of error associated with 90% confidence interval.

The margin of error is given by:

Zcritical * (standard deviation / sqrt(sample size)

Z critical at 90% confidence interval = 1.645

Hence,

Zcritical * (standard deviation / sqrt(sample size)

1.645 * 13.1 / sqrt(47)

1.645 * (13.1 / 6.8556546)

1.645 * 1.9108313

Hence, the margin of error is :

3.1433174885

= 3.14

8 0

2 years ago

A 5.ft tall man casts a shadow along the ground that is 8 ft. long. At the same time a giraffe casts a shadow that is 12 ft. lon

forsale [732]

Answer : 7.5 ft

Step-by-step explanation:

when the length of the shadow is 8ft, the actual height of the man = 5ft

8:5

let the giraffe be 'x' ft tall.

if the length of the shadow is 12ft, actual height = x ft

12:x

8:5 x 12:x

$\frac{8}{5}$ × $\frac{12}{x}$

x= $\frac{15}{2}$

x=7.5 ft

Therefore, the giraffe is 7.5ft tall.

4 0

1 year ago

Read 2 more answers

Five spheres are being painted for a display at a store. If the diameter of each sphere is

ivanzaharov [21]

<h2>Hello!</h2>

The answer is:

The total area is:

$TotalArea=192.4cm^{2}$

To find the cloasest value to the total surface area that will be painted, we need to calculate the area of a single sphere, and then, multiply it by 5.

We know that the diameter of each sphere is 7 centimeters, so, calculating we have:

Calculating the radius we have,

$diameter=2*radius\\\\radius=\frac{diameter}{2}=\frac{7cm}{2}=3.5cm$