How to solve these question?

Answers

Answer 1

Answer: 1a) Time = Distance/Speed

t= 20/x seconds

b) d=25m
s= x+0.5 m/s
t= d/s = 25/x+0.5

c) total time = 6 seconds
therefore, 20/x + 25/x+0.5 = 6
make a common denominator of x(x+0.5):

(20(x+0.5) + 25x)/x(x+0.5) = 6
move the demoninator to the other side, and expand to form:

20x+10+25x = 6x(x+0.5)
45x+10= 6x^2 +3x
tidying it up (moving everything to one side)
6x^2 - 42x-10 = 0
divide everything by 2
3x^2-21x-5= 0 (as required)

d) use quadratic formula to solve

e) therefore, what does x equal?

hope this helps

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What decimal is written in words “five and four hundred sixty-seven ten thousandths”? a. 5.467

b. 5.0467

c. 5,647,000

d. 0.5467

Answers

Answer:

five and four hundred sixty-seven ten thousandths

b. 5.0467

0 tenths

0 hundreds

0 thousands

0 ten thousands

~batmans wife dun dun dun....

: Resolver el sistema de ecuaciones por el método de reducción. -x + 3y = 6 x + y = 2

Answers

Answer:

$x=0\ny=2$

Step-by-step explanation:

El método de reducción también llamado Suma y Resta, consiste en multiplicar una o ambas ecuaciones de tal manera que los coeficientes de una de las incógnitas sean iguales y de signo contrario, de tal forma que se eliminen al sumar las ecuaciones.

Nuestras ecuaciones son:

$-x+3y=6\nx+y=2$

En este caso podemos observar que x y -x son iguales y de signo contrario así que no tendremos que multiplicar y podemos sumar ambas ecuaciones.

Al sumarlas tenemos que:

$4y=8\ny=2$

Ahora sustituímos el valor que encontramos de y en la segunda ecuación para poder obtener el valor de x.

$x+y=2\nx+2=2\nx=2-2\nx=0$

Por lo tanto, x = 0 y y = 2

The midpoint of AB is M(4,0). If the coordinates of A are (3, -1), whatare the coordinates of B?

Answers

Answer:

Step-by-step explanation:

B (5,1)

Final answer:

By using the midpoint formula in reverse, we calculate the coordinates of point B to be (5, 1), given the midpoint M(4,0) and one endpoint A(3,-1).

Explanation:

In mathematics, the midpoint formula is commonly used to determine the middle point between two given points. The formula is M = [(x1+x2)/2 , (y1+y2)/2]. In this scenario, we are given the midpoint M(4,0) and one endpoint A(3,-1). We need to find the coordinates of the other endpoint, B. By using the midpoint formula in reverse, we can calculate for x2 and y2. Thus, the x-coordinate of B would be 2x - x1, so 2*4 -3 = 5. The y-coordinate of B would be 2y - y1, so 2*0 - (-1) = 1. Therefore, the coordinates of B are (5, 1).

Learn more about Midpoint Formula here:

brainly.com/question/15085041

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The solution to an equation is 21

Answers

an solution to an equation = 21 would be something like 2p + 7

if you wanna know how to solve this
here is how:
Simplifying 2p + 7 = 21 Reorder the terms: 7 + 2p = 21 Solving 7 + 2p = 21 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 2p = 21 + -7 Combine like terms: 7 + -7 = 0 0 + 2p = 21 + -7 2p = 21 + -7 Combine like terms: 21 + -7 = 14 2p = 14 Divide each side by '2'. p = 7 Simplifying p = 7

F f(x) = 0, what is x?0 only
–6 only
–2, 1, or 3 only
–6, –2, 1, or 3 only

Answers

Final answer:

To find where f(x)=0, also known as the root or solution of the function, you need to know the specific function. With the specifics of the function, you could then solve for x using methods like factoring, completing the square, or the quadratic formula.

Explanation:

In mathematics, when we say f(x) = 0, we are seeking for the values of x that would make the function f(x) equal to zero. This is traditionally referred to as finding the root, zero or solution of the function. However, without a specific function, such as f(x) = x^2 - 4 for example, we can't specify which values x may take. If we knew more about the particulars of the function, we could use a variety of methods such as factoring, completing the square, or using the quadratic formula to solve for x.