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Anna007 [38]
3 years ago
13

Is 4 a solution of 2x = 8

Mathematics
2 answers:
Ivenika [448]3 years ago
6 0

Answer: yes

Step-by-step explanation:

2(4)=8

Reptile [31]3 years ago
6 0

Answer: yes

Step-by-step explanation:

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The engine torque y (in foot-pounds) of one model of car is given by y=−3.75x2+23.2x+38.8, where x is the speed (in thousands of
Stels [109]

Answer:

Step-by-step explanation:

If the engine torque y (in foot-pounds) of one model of car is given by y=−3.75x^2+23.2x+38.8

The engine speed is at maximum if dy/dx = 0

dy/dx = -2(3.75)x+23.2

dy/dx = -7.5x + 23.2

since dy/dx = 0

0 =  -7.5x + 23.2

7.5x = 23.2

x = 23.2/7.5

x = 3.093

Hence the maximum torque is 3.09 rev/min

8 0
3 years ago
A cone and a cylinder have equal radius, r, and equal altitudes, h. If the slant height of the cone is l, then the ratio of the
77julia77 [94]

Given:

radius of cone = r

height of cone = h

radius of cylinder = r

height of cylinder = h

slant height of cone = l

Solution

The lateral area (A) of a cone can be found using the formula:

A\text{ = }\pi rl

where r is the radius and l is the slant height

The lateral area (A) of a cylinder can be found using the formula:

A\text{ = 2}\pi rh

The ratio of the lateral area of the cone to the lateral area of the cylinder is:

\pi rl\text{ : 2}\pi rh

Canceling out, we have:

\begin{gathered} =\frac{\pi rl}{2\pi rh} \\ =\text{ }\frac{l}{2h}\text{  or l:2h} \end{gathered}

Hence the Answer is option B

3 0
1 year ago
A driver averaged 53 miles per hour and took 15 hours to travel between two cities. what is the distance between the two​ cities
Aneli [31]

Answer: 795 miles

Step-by-step explanation:

D = st

D = 53 m/h * 15 h

D = 795 miles

5 0
3 years ago
(x-4)^2+12(x-4)+20=0
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Answer:

x=2 or x=−6

Step-by-step explanation:

4 0
3 years ago
Please help I’ll give brainliest
Oksi-84 [34.3K]
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3 years ago
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