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Snowcat [4.5K]
3 years ago
7

Simplify the following expression: NEED HELP QUICK PLZ :(

Mathematics
1 answer:
Anna71 [15]3 years ago
5 0
The answer is B

-8y + 7y = -y

When the signs are different, subtract and take the sign of the bigger number.
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Algebra help needed
lesantik [10]

Answer:

The ball will reach the ground when h=0.

Set the equation equal to 0.

0=-8(2 t-4)(t+1)

t=-1,2

Step-by-step explanation:

The height of a golf ball after it has been hit from the top of a hill can be modeled by the equation

h=-8(2 t-4)(t+1),

where h is the height in feet and t is time in seconds.  

When ball will reach the ground the distance between ball and ground is 0. So, the ball will reach the ground when h=0.

To find the time it takes for the ball to reach the ground,  set the equation equal to 0 and use the Zero Product Property to solve for $t$.

h=-8(2 t-4)(t+1)

\Rightarrow 0=-8(2 t-4)(t+1)

Solve the equation using the Zero Product Property.

2t-4=0\Rightarrow t=\dfrac{4}{2}=2

t+1=0\Rightarrow t=-1

So, t=-1,2

7 0
3 years ago
Pls help me give u a brainlest
Ksivusya [100]

Answer:

1. 3375 ft cubed

2. 200 cm cubed

Step-by-step explanation:

btw in the image the shapes are not drawn to scale

:D brainliest?

4 0
2 years ago
Read 2 more answers
4(x−2+y)<br> It's for khan academy
inessss [21]
The answer is 4x-8+4y i think?
4 0
2 years ago
6x-12+2x=3+8x-15 please
andreev551 [17]
6x-12+2x=3+8x-15 \\ \\ 8x-12=8x-12 \\ \\ 8x-8x=-12+12 \\ \\ \boxed{0=0}
5 0
3 years ago
Read 2 more answers
The cost of 90 kg of rice is 4500. what is the cost of 2 quintal of rice?​
gayaneshka [121]

Answer:

The cost of 2 quintal of rice is $10,000.

Step-by-step explanation:

To determine the cost of 2 quintals of rice, knowing that 90 kilos of said product is worth $ 4,500, it is first necessary to establish the equivalence between quintals and kilograms. In this regard, a quintal is equivalent to 100 kilograms, so 2 quintals are equivalent to 200 kilos.

Now, to determine the cost per kilogram of rice, the following calculation is required:

4,500 / 90 = X

50 = X

Therefore, 1 kilogram of rice costs $ 50. Thus, since 200 x 50 equals 10,000, 2 quintals of rice will cost $ 10,000.

5 0
3 years ago
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