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3 years ago

I need help please.

Mathematics

2 answers:

Romashka-Z-Leto [24]3 years ago

8 0

Answer:

The answer is

d 32.1 units

jeyben [28]3 years ago

4 0

Answer:

32.1 (d)

Step-by-step explanation:

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Which of the following is an extraneous solution of sqrt 4x + 41 = x+5

stiv31 [10]

Answer:

x=-8

Step-by-step explanation:

$\sqrt{4x+41}=x+5$

on squaring both sides

$4x+41=(x+5)^2\\\\4x+41=x^2+10x+25\\\\x^2+6x-16=0\\\\x^2+8x-2x-16=0\\\\x(x+8)-2(x+8)=0\\\\(x-2)(x+8)=0$

either x-2=0 or x+8=0

either x=2 or x=-8

Putting x=2 in original equation, we get

$\sqrt{4\times 2+41}=2+5$

7=7 hence, it is not an extraneous solution

Putting x=-8 in original equation

$\sqrt{4\times (-8)+41}=-8+5$

i.e. 3=-3

Hence, x=-8 is an extraneous solution (since it doesn't satisfy the original equation)

3 0

3 years ago

Read 2 more answers

Lin has a drawing with an area of 18 square inches. If she increases all the sides by a scale factor of 3, what will the new are

Amiraneli [1.4K]

Answer:

2/3

Step-by-step explanation:

the slope of a line is equal to the rise/run. in this case the line rises 2 units for every +3 units it moves

sry if wrong but i hope it helps

3 0

3 years ago

Name the subset(s) of real numbers to which each number belongs. Then order the numbers from least to greatest.

barxatty [35]

Answer:

I'm assuming 45−−√ is $\sqrt{45}$ , and that it belongs to the subset of irrational numbers.

16/5 is a rational number, and -1 is an integer.

All numbers belong to the subset of real numbers.

Step-by-step explanation:

Hope this helped!

7 0

3 years ago

A swimming pool is 65.25 feet long and 40.5 feet wide. How much longer is the pool than it is wide?

melamori03 [73]

65.25 - 40.50 = How much longer the pool is than wide

= 24.75 longer

It is also or about 38%.

7 0

4 years ago

What is the system of inequalities associated with the following graph?

slamgirl [31]

One line passes through the points (-2,3) and (0,-3) , it means the y intercept is b=-3

and slope m = $\frac{(-3-3)}{0-(-2)}$

$= \frac{-6}{2}= -3$

So the equation of line will be $y= -3x -3$

And the inequality should be $y\geq -3x-3$

Or $3x +y \geq -3$

And the other line passes through (-2,3) and (0,2)

So the y intercept is b=2

and the slope is $m= \frac{2-3}{0-(-2)} = \frac{-1}{2}$

So the equation of line will be $y= \frac{-1}{2} x +2\\and the inequality should be y \leq \frac{-1}{2} x+2$

$2y +x \leq 4$

So answer is $3x +y \geq -3, x+2y\leq 4$

6 0

4 years ago

Read 2 more answers

I need help please.​

I need help please.