Help please y'all .......

If h(x) = x – 7 and g(x) = x2, which expression is equivalent to (gxh)(5)??

vovikov84 [41]

We want g(h(5)).

First find h(5).

h(5) = 5 - 7

h(5) = -2

We now find g(-2).

g(x) = x^2

g(- 2) = (-2)^2

g(-2) = 4

In conclusion, g(h(5)) = 4.

7 0

3 years ago

-15x+3.2y+7x+3y i need help with this question

Natali5045456 [20]

The answer is -8x+6.2y

6 0

3 years ago

Which system of equations has only one solution? 4 x + 2 y = 8. Negative 4 x minus 2 y = 3. Negative 5 x + y = 6. 5 x minus y =

madam [21]

Answer:

Following system of equations have exactly one solution:

$2 x + 4 y = 6\\ 3 x - 4 y = 9$

Step-by-step explanation:

Given 4 system of equations:

1st

$4 x + 2 y = 8\\ -4 x -2 y = 3$

2nd

$-5 x + y = 6\\ 5 x - y = - 6$

3rd

$- 3 x + 4 y = 2\\ 3 x - 4 y = 0$

4th

$2 x + 4 y = 6\\ 3 x - 4 y = 9$

To find: Which system of equations has only one solution?

Solution:

First of all, let us learn the concept.

Let the equation of lines be:

$a_1x+b_1y+ c_1=0$ and $a_2x+b_2y+ c_2=0$

1. No solution:

There exists no solution if:

$\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}\neq\dfrac{c_1}{c_2}$

2. Infinite solutions:

There exist infinitely many solutions if:

$\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}=\dfrac{c_1}{c_2}$

3. One solution:

There exists one solution if:

$\dfrac{a_1}{a_2}\neq\dfrac{b_1}{b_2}$

Now, let us consider the given equations one by one.

1st system of equations:

The ratio is:

$\dfrac{4}{-4} , \dfrac{2}{-2} , \dfrac{8}{3}\\-1 =-1\neq \dfrac{8}{3}$

So, no solution.

2nd system of equations:

The ratio:

$\dfrac{-5}{5} , \dfrac{-1}{1} , \dfrac{6}{-6}\\-1 =-1=-1$

So, infinitely many solutions.

3rd system of equations:

$\dfrac{3}{-3} , \dfrac{-4}{4} , \dfrac{0}{2}\\-1 =-1\ne0$

So, no solution.

4th system of equations:

$\dfrac{2}{3} , \dfrac{4}{-4} , \dfrac{6}{9}\\\dfrac{2}{3} \ne-1$

Hence, only one solution.

So, the answer is:

Following system of equations have only one solution:

$2 x + 4 y = 6\\ 3 x - 4 y = 9$

8 0

3 years ago

Arrange the following in ascending order 15, 5, - 10, - 18, - 35

grigory [225]

It’s literally it except it’s the other way around so it’s: -35, -18, -10, 5, 15

3 0

3 years ago

Read 2 more answers

Find the center and the radius

Paha777 [63]

Answer:

Center: $(0,9)$

Radius: $15$

Step-by-step explanation:

-According to the following equation, the center would be $(0,9)$ , because the center is known as $(h,k)$ from the equation of a circle. To find the radius, you would only need to square root the simplified radius from the following the equation and you would get the radius 15:

The equation of a circle:

$(x-h)^2+(y-k)^2 =r^2$

The following equation:

$x^2+(y-9)^2 =225$

Center: $(0,9)$ Radius: $\sqrt{225} = 15$

5 0

3 years ago