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3 years ago

9

Ethan throws a ball into the air from a cliff that is 152.4 m high with an initial velocity of 4 m/s. How long does it take for

the ball to hit the ground?

1 answer:

Daniel [21]3 years ago

3 0

38.1, all you have to do is divide the two numbers.

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Solve the system by using the technique of ‘elimination’: -2x+5y=-42,7x+2y=30

Gekata [30.6K]

Solve the following system using elimination:

{5 y - 2 x = -42 | (equation 1)

7 x + 2 y = 30 | (equation 2)

Swap equation 1 with equation 2:

{7 x + 2 y = 30 | (equation 1)

-(2 x) + 5 y = -42 | (equation 2)

Add 2/7 × (equation 1) to equation 2:

{7 x + 2 y = 30 | (equation 1)

0 x+(39 y)/7 = (-234)/7 | (equation 2)

Multiply equation 2 by 7/39:

{7 x + 2 y = 30 | (equation 1)

0 x+y = -6 | (equation 2)

Subtract 2 × (equation 2) from equation 1:

{7 x+0 y = 42 | (equation 1)

0 x+y = -6 | (equation 2)

Divide equation 1 by 7:

{x+0 y = 6 | (equation 1)

0 x+y = -6 | (equation 2)

Collect results:

Answer: {x = 6, y = -6

3 0

3 years ago

$900 for 9 months than for six months

MariettaO [177]

Then it would be 600

4 0

3 years ago

What is the greatest common factor of the terms of the polynomial below? 8x^4 - 12x^3 + 20x^2

Daniel [21]

Answer: I think the greatest common factor is 4x^2

Step-by-step explanation:

Find the numerical common factors. Which are 8, -12, and 20. Find the variable common factors for x^4, x^3, and x^2. Multiply them together. Then break down the factors on both sides and pick the biggest one. Finally multiply them together. (I’m sorry, I’m very bad at explaining things.)

7 0

3 years ago

What’s the answer to number 4 ?

Marizza181 [45]

Answer:

$4.36*10^-^1$

Step-by-step explanation:

Given:

$(3.6*10^-^2)+(4.0*10^-^1)$

Make the power of '10' equal by shifting the decimal place of any one value.

$(0.36*10^-^1)+(4.0*10^-^1)$

Taking the ' $10^-^1$ ' common

$10^-^1*(0.36+4.0)$

Adding the values in the bracket gives:

$4.36*10^-^1$

7 0

3 years ago

Read 2 more answers

Plz help meee!!!!!!!!!!!!!!11

Rudiy27

Answer: 15) 1 16) 30

Step-by-step explanation:

15 ) Since 15 you are shown that the larger has 30 & 5 so, if it has shrunk until now that 30 has turned into 6 that means it has shrunk by 5 times the original bigger triangle has (30 divided by 6 = 5). 5 can go into 5 1 time so you get 1

16) We have an isosceles triangle so all the sides will be equal. So If one side is 30 then the rest will be 30. This is also shown with the smaller triangle, with both sides equaling 6.

8 0

3 years ago