All categories

3 years ago

13. Solve –5√ x = –15. A. x = –9 B. x = –7 C. x = 9 D. x = 7

Mathematics

1 answer:

ddd [48]3 years ago

4 0

$Domain:x\geq0\\\\-5\sqrt{x}=-15\qquad\text{divide both sides by (-5)}\\\\\sqrt{x}=3\to \boxed{x=9}\to\boxed{C.}$

You might be interested in

What percent of 33 is 22

serious [3.7K]

Wait so are you asking what 22% of 33 is?
if so you cross multiply so
33 = 100%
? = 22%
then you times 33 x 22 = 726
then you divide 726 by 100 = 7.26
so 22% of 33 is 7.26

7 0

3 years ago

Read 2 more answers

PLEASE HELP THANKS, Scale factoring

Radda [10]

Answer:

17.5 or 35

Step-by-step explanation:

because 350/10=35

350/12=17.5

8 0

3 years ago

The sum of two and a number is at least 16

stich3 [128]

Answer:

Step-by-step explanation:

"Sum" means you add.

The equation is 2+x.

7 0

3 years ago

Read 2 more answers

Which of the following statements represents a correct relantionship

Nezavi [6.7K]

Hey there!

$\bold{345>354}$ is false because $\bold{345}$ is smaller/less than $\bold{354}$
$\bold{400$ is incorrect because $\bold{40}$ is smaller/lesser than $\bold{400}$
$\bold{4008$ is correct because $\bold{4080}$ is bigger than/ greater than $\bold{4008}$
$\bold{23,090=23009}$ is incorrect because $\bold{23090\neq23009}$

$\boxed{\boxed{\bold{Answer:C.)4008$

Good luck on your assignment and enjoy your day!

~ $\bold{LoveYourselfFirst:)}$

3 0

3 years ago

Solve for x in the equation x^2- 10x+ 25=35

DIA [1.3K]

Answer:

Step-by-step explanation:

x² - 10x + 25 = 35

Move 35 to the left side of the equation

That's

x² - 10x + 25 - 35 = 0

x ² - 10x - 10 = 0

Using the quadratic formula solve the equation

That's

From the question

a = 1 , b = - 10 , c = - 10

Substitute the values into the above formula and solve

That's

$x = \frac{ - - 10\pm \sqrt{( { - 10})^{2} - 4(1)( - 10) } }{2(1)} \\ = \frac{10\pm \sqrt{100 + 40} }{2} \\ = \frac{10\pm \sqrt{140} }{2} \\ = \frac{10\pm2 \sqrt{35} }{2} \\ = \frac{10}{2} \pm \frac{2 \sqrt{35} }{2} \\ = 5\pm \sqrt{35}$

We have the final answer as

Hope this helps you

7 0

3 years ago