All categories

2 years ago

Which of the following equations shows how substitution can be used to solve the following

Mathematics

1 answer:

slega [8]2 years ago

8 0

Answer:

Step-by-step explanation:

the y= equation shows how... b/c we can just plug y into the 2nd equation and eliminate y and have one variable, x , to solve for :)

You might be interested in

[Quick Answer Needed] Which of the following shows the extraneous solution to the logarithmic equation?

Nitella [24]

Answer:

Step-by-step explanation:

Given the logarithmic equation

$\log_4x+\log_4(x-3)=\log_4(-7x+21)$

First, notice that

$x>0\\ \\x-3>0\Rightarrow x>3\\ \\-7x+21>0\Rightarrow 7x$

So, there is no possible solutions, all possible solutions will be extraneous.

Solve the equation:

$\log_4x+\log_4(x-3)=\log_4x(x-3),$

then

$\log_4x(x-3)=\log_4(-7x+21)\\ \\x(x-3)=-7x+21\\ \\x^2-3x+7x-21=0\\ \\x^2+4x-21=0\\ \\D=4^2-4\cdot 1\cdot (-21)=16+84=100\\ \\x_{1,2}=\dfrac{-4\pm 10}{2}=-7,\ 3$

Hence, $x=3$ and $x=-7$ are extraneous solutions

6 0

3 years ago

Simplify <br> Rewrite the expression in the form z^n<br><br> z^5•z^6= ______

gtnhenbr [62]

Answer:

z²^30

Step-by-step explanation:

This is it enjoy.

4 0

3 years ago

Which number is divisibly by both 3 and 4?

STatiana [176]

The answer is c) 118,764

8 0

3 years ago

Read 2 more answers

The x-coordinate of the point (50, 55) is ___________.

marysya [2.9K]

The x-coordinate of the point (50, 55) is 50

<h3>What is graph?</h3>

A graph can be defined as a pictorial representation or a diagram that represents data or values.

The distance of point (50, 55) perpendicular to y-axis

Thus, perpendicular distance = 50 units

The x-coordinate of the point (50, 55) is 50

Learn more about graph

brainly.com/question/16608196

#SPJ2

8 0

2 years ago

Read 2 more answers

Using the distributive property method on 6x32 and 7x29

Maru [420]

$6\cdot32=6(30+2)=(6)(30)+(6)(2)=180+12=192\\\\7\cdot29=7(30-1)=(7)(30)-(7)(1)=210-7=203$

6 0

3 years ago

Read 2 more answers