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4 years ago

√a=-2 find the extraneous solution

Mathematics

1 answer:

Hunter-Best [27]4 years ago

6 0

A=4 because √a=-2 the you square each side to make it a=4.

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How many solutions are there to the system of equations?

hichkok12 [17]

Answer: The system of equations has NO SOLUTION.

Step-by-step explanation:

The equation of the line in Slope-Intercept form is:

$y=mx+b$

Where "m" is the slope and "b" is the y-intercept.

Given the following system of equations:

$\left \{ {{4x-5y=5} \atop {-0.08x+0.10y=0.10}} \right.$

Write the first equation and solve for "y" in order to express it in Slope-Intercept form:

$4x-5y=5\\\\-5y=-4x+5\\\\y=\frac{-4x}{-5}+\frac{5}{-5}\\\\y=0.8x-1$

You can identify that:

$m=0.8\\b=-1$

Apply the same procedure with the second equation. Then:

$-0.08x+0.10y=0.10\\\\0.10y=0.08x+0.10\\\\y=\frac{0.08x}{0.10} +\frac{0.10}{0.10}\\\\y=0.8x+1$

You can identify that:

$m=0.8\\b=1$

The slopes of both lines are equal, therefore the lines are parallel and the system has NO SOLUTION.

7 0

4 years ago

Read 2 more answers

Help solve for r????

Aleonysh [2.5K]

$\ \frac{66(r)}{22} - ( \frac{16}{16} - 1) = r + \frac{72}{3} \div 3 \\ \frac{3r}{1} - 0 = r + 72 \\ 3r = r + 72 \\ r = 36$

3 0

4 years ago

What percent of 50 is 18?

ki77a [65]

18÷50×100%=36%
Ans : 36%
If you don't understand feel free to message me

4 0

3 years ago

Read 2 more answers

What should be done first to simplify the expression?

Olin [163]

Answer:

add 3+3

Step-by-step explanation:

8 0

4 years ago

PLEASE HELP D:

garik1379 [7]

Answer:

C. 40 ft²

Step-by-step explanation:

Triangle area formula:

A = bh/2, where b- base, h- height

We have:

b = 8 ft, h = 10 ft

The area is:

A = 8*10/2 = 40 ft²

Correct choice is C

4 0

3 years ago