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Andru [333]
3 years ago
8

I don’t get this Help!!! Plz help ASAP!I’m like ligiterally freaking out rn

Mathematics
2 answers:
Sindrei [870]3 years ago
8 0

Answer:

-0.5

Step-by-step explanation:

-0.7 +0.5 = (-0.2)

-0.2-(-0.3)= -0.5

sorry if you dont get meh explantions T^T

Morgarella [4.7K]3 years ago
7 0
Answer: -0.5 kg
Step by step explanation:
the negative value means that the cats weight decreased from the previous months and the positive values means that the cats weight increased

we’re trying to find how much change the car went through in the last 3 months

so we just add up the changes
-0.7+0.5-0.3=-0.5

This tells us that in 3 months the cats total weight change is a decrease of 0.5 ponds therefore the answer is -0.5
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After a baseball is hit, the height h (in feet) of the ball above the ground t seconds after it is hit can be approximated by th
lubasha [3.4K]

Answer:

The ball will take 4.05 seconds to hit the ground.

Step-by-step explanation:

we have

h=-16t^{2}+64t+3

This is a quadratic equation (vertical parabola) open down

The vertex is a maximum

we know that

The ball hit the ground when h=0

Solve the quadratic equation

For h=0

-16t^{2}+64t+3=0

The formula to solve a quadratic equation of the form

at^{2} +bt+c=0 is equal to

t=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

-16t^{2}+64t+3=0  

so

a=-16\\b=64\\c=3

substitute in the formula  

t=\frac{-64(+/-)\sqrt{64^{2}-4(-16)(3)}} {2(-16)}

t=\frac{-64(+/-)\sqrt{4,288}} {-32}

t=\frac{64(-)\sqrt{4,288}} {32}=-0.05\ sec  ---> the time cannot be a negative number

t=\frac{64(+)\sqrt{4,288}} {32}=4.05\ sec

therefore

The ball will take 4.05 seconds to hit the ground.

4 0
3 years ago
EB = 33, BD = 5x - 10 and ED = 9x + 3. Find x.
serious [3.7K]
X=11
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3 0
3 years ago
Change the following expression to an equivalent expression in exponential form
Sever21 [200]

Answer:

12^4/5

Step-by-step explanation:

When doing this you put the number the base is raised to on top of the fraction and the root number on the bottom

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3 years ago
SI unit of areaWhat is the SI unit of area ​
Contact [7]

square meter is the SI unit of area.

5 0
3 years ago
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Find the distance between the points.<br> (r, s) and (0, 0)
zhenek [66]

Answer:  \sqrt{r^2+s^2

=====================================================

Reason:

Plot the points (0,0) and (r,s). You can place (r,s) anywhere you want.

Connect the two points mentioned and form a right triangle such that the segment from (0,0) to (r,s) is the hypotenuse of said right triangle.

The horizontal leg has a length of r-0 = r units, while the vertical leg will be 's' units.

Check out the diagram below.

We then apply the pythagorean theorem to say r^2+s^2 = h^2 where h is the hypotenuse. Solving for h gets us h = \sqrt{r^2+s^2}. We only focus on the positive square root since a negative hypotenuse makes no sense.

Since we made the hypotenuse the segment with endpoints (r,s) and (0,0), this means the hypotenuse length and the distance are the same thing.

Therefore, the distance from (r,s) to (0,0) is \sqrt{r^2+s^2}

As an alternative, you can use the distance formula to get the same answer. The distance formula is effectively the pythagorean theorem phrased a different way.

5 0
2 years ago
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