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3 years ago

Help please and explain

Mathematics

1 answer:

Ksenya-84 [330]3 years ago

5 0

Answer:

20x

Step-by-step explanation:

5x * 4 = 20x

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Please help.! Which of the following show an element of the sample space for first shooting a basketball and then rolling a die?

Allushta [10]

Answer:

A, B, and D

Step-by-step explanation:

E is discarded, since the number 7 does not exist on a die.

F is discarded because there are no letters in a die

C is discarded because the elements are placed backwards

7 0

3 years ago

Explain how you would solve the following system of equations using substitution. math step in your explanation, too!! This is t

aivan3 [116]

Answer:

$x=2\\y=3$

Step-by-step explanation:

Solve by substitution method

$y=4x-5\\y=3x-3$

First, solve $y=4x-5$ for $y$ :

Substitute $4x-5$ for $y$ in $y=3x-3$

$y=3x-3$

$4x-5=3x-3$

$4x-3x=5-3$

$x=2$

Now that we have the value of x

substitute $2$ for $x$ in $y=4x-5$

$y=4x-5$

$y=4(2)-5$

$y=8-5$

$y=3$

∴ The value of $x$ is $2$ and the value of $y$ is $3$

8 0

3 years ago

Please helpppp!!!<br><br><br> Solve: x^2 - 4x-5=0

PtichkaEL [24]

Answer:

$x=-1,5$

Step-by-step explanation:

$x^2-4x-5=0$

In order to solve this quadratic, we have many methods. We can factor, complete the square, or use the quadratic formula. I'm going to factor since it's the easiest method.

To factor, find two numbers that when multiplied equal a(c) and when added equal b.

a=1, b=-4, and c=-5.

So we want two numbers that when multiplied equals 1(-5)=-5 and when added equals -4.

-5 and 1 are the possible numbers. Therefore:

$x^2-4x-5=0\\x^2+x-5x-5=0\\x(x+1)-5(x+1)=0\\(x-5)(x+1)=0\\x=5, -1$

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3 years ago

-1+8v=2+8v what is the value of v?

Nesterboy [21]

Answer: There are no solutions.

Step-by-step explanation:

6 0

3 years ago

A person is strolling along a moving walkway at a constant velocity of +1.00 m/s with respect to the walkway, which moves at a c

Bezzdna [24]

Refer to the diagram shown below.

The velocity of the person on the walkway relative to the ground is the velocity of the walkway (relative to the ground) plus the velocity of the person relative to the walkway.
It is
1.0 + 0.5 = 1.5 m/s

The person on the ground moves at - 0.2 m/s, which is in the opposite direction to that of the walkway and the person on the walkway.
Therefore the velocity of the person on the walkway relative to the person on the ground is
105 - (-0.2) = 1.7 m/s

Answer: 1.7 m/s

7 0

3 years ago