3 years ago

If the area of a rectangle equals 28 square centimeters what is the height?

Mathematics

1 answer:

Slav-nsk [51]3 years ago

3 0

So the length and width would be 7 and 4. hope that helped

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Choose all of the values for x that are solutions to x < -2.

OverLord2011 [107]

I think the answer is E

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2 years ago

3x -7= -5(x+3); x= -1

Inessa [10]

Answer:

-10

Step-by-step explanation:

-1+3= -2

-2 times -5= -10

3 times -1= -3

-3 -7=-10

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2 years ago

The kinetic energy (in joules) of a moving object can be calculated from the expression 1/2mv^2, where m is the mass of the obje

algol13

Answer: $116\text{ joules}$

Step-by-step explanation:

Given: Mass of baseball=0.145 kg

Speed of baseball=40 meters per second

Also it is given that The kinetic energy (in joules) of a moving object can be calculated from the expression $\frac{1}{2}mv^2$ , where 'm' is the mass of the object in kilograms and 'v' is its speed in meters per second.

Thus, the kinetic energy of baseball= $\frac{1}{2}(0.145)(40)^2$

$\frac{1}{2}(0.145)(1600)=116\text{ joules}$

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2 years ago

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A train travels 50 km in 1 hour and then 96 km in 4 hours what is its average speed

svet-max [94.6K]

Answer: 37 km per hour

Step-by-step explanation: 96/4=24

24+50=74

74/2=37

8 0

2 years ago

If an object is projected upward into the air from ground level, then the height h(t) of the object

AfilCa [17]

Answer:

21.5secs

Step-by-step explanation:

Given the function that models the height of an object as

h(t) = -16t^2+ 344t

The object hit the ground at h(t) = 0

Substitute

0 = -16t^2+ 344t

16t^2 = 344t

16t = 344

t = 344/16

t = 21.5

Hence it takes 21.5secs for the object to hit the ground

5 0

2 years ago