3 years ago

Find the solution(s) to x^2- 14x + 49 = 0.

Mathematics

1 answer:

malfutka [58]3 years ago

3 0

Answer:

$\boxed{C. \: x = 7 \: only}$

Step-by-step explanation:

$= > {x}^{2} - 14x + 49 = 0 \\ \\ = > {x}^{2} - (7 + 7)x + 49 = 0 \\ \\ = > {x}^{2} - 7x - 7x + 49 = 0 \\ \\ = > x(x - 7) - 7(x - 7) = 0 \\ \\ = > (x - 7)(x - 7) = 0 \\ \\ = > {(x - 7)}^{2} = 0 \\ \\ = > x - 7 = 0 \\ \\ = > x = 7$

You might be interested in

What is 2m×2 to the 7 power

Nina [5.8K]

Answer:

256m

Step-by-step explanation:

not 100% sure but i hope this helps :)

8 0

3 years ago

Read 2 more answers

two angles form a straight angle. what is the one angle measures 89°. what is the measure of the other angle?

ICE Princess25 [194]

A straight line is = to 180 degrees (straight angle) so the formula would be
X+89=180
subtract the 89 from both sides and you get x=91
so the other angle is 91 degrees

4 0

3 years ago

Read 2 more answers

From a practice assignment:<br>solve the following differential equation given initial conditions

hodyreva [135]

If $y' = e^y \sin(x)$ and $y(-\pi)=0$ , separate variables in the differential equation to get

$e^{-y} \, dy = \sin(x) \, dx$

Integrate both sides:

$\displaystyle \int e^{-y} \, dy = \int \sin(x) \, dx \implies -e^{-y} = -\cos(x) + C$

Use the initial condition to solve for $C$ :

$-e^{-0} = -\cos(-\pi) + C \implies -1 = 1 + C \implies C = -2$

Then the particular solution to the initial value problem is

$-e^{-y} = -\cos(x) - 2 \implies e^{-y} = \cos(x) + 2$

(A)

4 0

2 years ago

There are 487 students using a chromebook 448 students not using a chromebook.What is the probability that a student is Not usin

gtnhenbr [62]

Answer:

The answer is 92%

Step-by-step explanation:

448/487=.92

8 0

3 years ago

Read 2 more answers

A school custodian waxed a gymnasium floor that measured 20 feet by 20 feet. How many square feet did she have to wax?

stealth61 [152]

A school custodian waxed a gymnasium floor that measured 20 feet by 20 feet. How many square feet did she have to wax?

If it's 20 feet * 20 feet = to
400 sq.ft

Hope this helps!

6 0

3 years ago