All categories

3 years ago

Evaluating Expressionsx-7 for x=-8 for x=-11for x= 16

1 answer:

4 0

You just substitute in what x equals. ex. x=16, x-7 : 16-7=9.

x-7

1. x= -8; -8-7= -15
2. x= -11; -11-7= -18
3. x=16; 16-7= 9

You might be interested in

Solve for x A)9 B)33 C)45 D)62

sattari [20]

Answer:

A) 9

Step-by-step explanation:

R=7x+17

S=4x-6

Q=180-110=70

4x-6+7x+17+70=180
11x+81=190
11x=180-81
11x=99
x=99/11
x=9

3 0

3 years ago

PLEASE HELP (30 POINTS) Solve the rational equation x/3 = x^2/x + 5 , and check for extraneous solutions.

anygoal [31]

Option C: $x=0$ and $x=\frac{5}{2}$ are the solutions.

Explanation:

The equation is $\frac{x}{3} =\frac{x^{2} }{x+5}$

We shall determine the value of x, by simplifying the equation.

$\begin{aligned} x(x+5) &=3 x^{2} \\ x^{2}+5 x &=3 x^{2} \\ 2 x^{2}-5 x &=0 \\ x(2 x-5) &=0 \end{aligned}$

Thus, $x=0$ and $x=\frac{5}{2}$ are the solutions.

Now, let us check whether the solutions are extraneous solutions.

Let us substitute $x=0$ in the original equation to check whether both sides of the equation are equal.

$\begin{aligned}&\frac{0}{3}=\frac{0^{2}}{0+5}\\&0=\frac{0}{5}\\&0=0\end{aligned}$

Thus, both sides of the equation are equal.

Hence $x=0$ is a true solution.

Now, Let us substitute $x=\frac{5}{2}$ in the original equation to check whether both sides of the equation are equal.

$\begin{aligned}\frac{\left(\frac{5}{2}\right)}{3} &=\frac{\left(\frac{5}{2}\right)^{2}}{\left(\frac{5}{2}\right)+5} \\\frac{5}{6} &=\frac{\left(\frac{25}{4}\right)}{\left(\frac{15}{2}\right)} \\\frac{5}{6} &=\frac{5}{6}\end{aligned}$

Thus, both sides of the equation are equal.

Hence, $x=\frac{5}{2}$ is a true solution.

Thus, solutions are not extraneous.

Hence, Option C is the correct answer.

8 0

3 years ago

the chorus has 35 members. which expression represents the number of ways a group of 6 members can be chosen to do a special per

zimovet [89]

You have to choose $6$ members from the group of $35$ people. So there are $\binom{35}{6}$ ways to do it.

3 0

3 years ago

Read 2 more answers

Solve the inequality for the missing variable 24 -1t 1/5

Scorpion4ik [409]

Answer:

−t+24

Step-by-step explanation:

8 0

3 years ago

How do you factor 45x^2+295x-140

Vaselesa [24]

I could explain it, but you have to ask me, other than that the answer is 5(x+7)(9x-4).

8 0

3 years ago