1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MrMuchimi
2 years ago
7

X²-7=0 extracting square roots​

Mathematics
1 answer:
Irina-Kira [14]2 years ago
4 0

Answer:

x = ± \sqrt{7}

Step-by-step explanation:

Given

x² - 7 = 0 ( add 7 to both sides )

x² = 7 ( take the square root of both sides )

x = ± \sqrt{7}

You might be interested in
Find the slope of the line passing through the pairs of points and describe the line as rising, falling, horizontal or vertical.
Anna [14]

Answer:

a.\ m=2,\ \text{the line is rising}\\\\b.\ m=-\dfrac{5}{4},\ \text{the line is falling}\\\\c.\ m=0,\ \text{the line is horizontal}\\\\d.\ m\ is\ unde fined,\ \text{the line is vertical}

Step-by-step explanation:

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

If

m > 0, then a line is rising

m < 0, then a line is falling

m = 0, then a line is horizontal

m is undefined, then a line is vertical

<h2>a.</h2>

(2, 1) and (4, 5)

m=\dfrac{5-1}{4-2}=\dfrac{4}{2}=2>0\to\text{rising}

<h2>b.</h2>

(-1, 0) and (3, -5)

m=\dfrac{-5-0}{3-(-1)}=\dfrac{-5}{4}=-\dfrac{5}{4}

<h2>c.</h2>

(2, 1) and (-3, 1)

m=\dfrac{1-1}{-3-2}=\dfrac{0}{-5}=0\to\text{horizontal}

<h2>d.</h2>

(-1, 2) and (-1, -5)

m=\dfrac{-5-2}{-1-(-1))}=\dfrac{-7}{0}\ \text{UNDEFINED}\to\text{vertical}

7 0
3 years ago
Table of values 3x+2y=24
Mekhanik [1.2K]

3
x
+
2
y
>
24
3
x
+
2
y
>
24
Solve for
y
y
.
Tap for more steps...
y
>
−
3
x
2
+
12
y
>
-
3
x
2
+
12
Use the slope-intercept form to find the slope and y-intercept.
Tap for more steps...
Slope:
−
3
2
-
3
2
Y-Intercept:
12
12
Graph a dashed line, then shade the area above the boundary line since
y
y
is greater than
−
3
x
2
+
12
-
3
x
2
+
12
.
y
>
−
3
x
2
+
12
y
>
-
3
x
2
+
12
4 0
3 years ago
A rectangle has a length of 4 feet and a perimeter of 16 feet. What is the perimeter of a similar rectangle with a length of 9 f
kompoz [17]
The answer is 42 feet I use substitution and subtract by 8
7 0
3 years ago
Which system of linear equations represents another pair of parallel lines?
vesna_86 [32]

Answer:

The answer is C. 3x+y=7, 6x+2y=10

Step-by-step explanation:

7 0
2 years ago
D2-9k+3 for d=10 and k=9
AVprozaik [17]

Answer:

22

Step-by-step explanation:

10^2-9(9)+3

100-81+3

19+3

22

8 0
3 years ago
Other questions:
  • A video game randomly chooses your car color and type. The probability of getting a red car is 0.25, and the probability of gett
    12·2 answers
  • Can anyone plzzzz helpn<br> Thank you
    5·1 answer
  • What is the difference between 4/5 and 1/4
    6·2 answers
  • What does 10-|-5|=? please answer that would be appreciated
    12·1 answer
  • How do you prove #sin 5pi/12 = sin pi/6 cos pi/4 + cos pi/6 sin pi/4#?
    12·1 answer
  • WHAT IS ANOTHER WAY TO EXPRESS 52+24
    7·1 answer
  • What is the answer to this algebra question
    15·1 answer
  • Apple weights in an orchard are normally distributed. From a sample farmer Fred determines the mean weight of a box of apples to
    9·2 answers
  • Will mark brainliest! Solve for the measure of angle Y.
    13·1 answer
  • Which expression is equivalent to 16x^4 - 64?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!