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3 years ago

When 5 is subtracted from the square of a number, the result is 4 times the number. Find the negative solution.

Mathematics

1 answer:

wariber [46]3 years ago

8 0

Answer:

-1

Step-by-step explanation:

You can write it as...

$x^{2} -5=4x$

Carry the 4x

$x^{2} -4x-5=0$

Then use the quadratic formula to solve, since you want to find the negative solution, you don't need to find the positive solution, so we will have

$(4-\sqrt{16+20}) /2=\frac{4-6}{2}=\frac{-2}{2} =-1$

Therefore our answer is -1

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-4x - 5y=-7<br> -x+5y=17

ahrayia [7]

Answer:

X=-2,y=3

Step-by-step explanation:

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3 years ago

The circle graph shows the percentage of time Jacob spent on homework in each subject last week.Time Spent on Homework12.5%25%ar

Goshia [24]

We are given a circle graph that shows the time spent on homework last week.

Jacob spent a total of 16 hours doing homework.

The time spent on doing science homework is given by

$\begin{gathered} t_{\text{science}}=25\%\: of\: 16 \\ t_{\text{science}}=\frac{25}{100}\: \times\: 16=4\: \text{hours} \end{gathered}$

The time spent on doing band practice is given by

$\begin{gathered} t_{\text{band}}=12.5\%\: of\: 16 \\ t_{\text{science}}=\frac{12.5}{100}\: \times\: 16=2\: \text{hours} \end{gathered}$

The difference between the time spent on science homework and band practice is

$difference=t_{\text{science}}-t_{\text{band}}=4-2=2\: \text{hours}$

Therefore, Jacob spent 2 more hours on science homework than band practice.

4 0

1 year ago

What is the limit of the function?

SCORPION-xisa [38]

Answer:

Step-by-step explanation:

i think both are false.

$\lim_{x \to - \infty} f(x)= \lim_{x \to- \infty} (4x^8-3x^7+2x-11)\\ = \lim_{x \to - \infty} x^8(4-\frac{3}{x}+\frac{2 }{x^7} -\frac{11}{x^8})\\=-\infty(4-0+0-0)\\=-4 \infty\\=- \infty\\similarly other$

5 0

3 years ago

How many triangles can be made if one angle is 95° and the other angle is obtuse?

kodGreya [7K]

Only one because a triangle has all together 180 degrees therefore even one is 91 degrees the other one would have to be less than 91 making it acute

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3 years ago

A cylinder has a height of 2 inches. What is the radius of the cylinder if its volume is 228π ?

lianna [129]

Answer:

r = 10.68 in

Step-by-step explanation:

V = Pi x r^2 x h

228 pi = pi x r^2 x 2

(228 pi)/(pi x 2) = r^2

228/2 = r^2

Sqrt 114 = r

r = 10.68 in

6 0

2 years ago