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valkas [14]
3 years ago
5

What are the solutions to the equation x2 = 81?   A. 40.5 only   B. 40.5 and –40.5   C. 9 and –9   D. 9 only

Mathematics
2 answers:
Tema [17]3 years ago
5 0
x^2=81\ then\ x=9\ and\ x=-9\\\\because:(-9)^2=81\ and\ 9^2=81


x^2=81\to x=-\sqrt{81}\ and\ x=\sqrt{81}\to x=-9\ and\ x=9
Andreyy893 years ago
4 0

Answer:

C. 9 and -9

Step-by-step explanation:

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olga nikolaevna [1]

Answer:

(4−3i)x^2

=4x^2 - 3ix^2

3 0
2 years ago
Read 2 more answers
For the function y = -10x find the matching y-value when x = 3​
Alchen [17]

Answer:

y= -30

Step-by-step explanation:

THis is because you substitue 3  for X and then multiply -10 and 3 and a negative times a positive is a negative so -10 times 3 is -30

6 0
3 years ago
Read 2 more answers
Points and their residual values are shown in the table. a 3-column table with 5 rows. the first column is labeled x with entrie
maksim [4K]

The residual value, which is the farthest from the line of best fit for the table which shows points and their residual values, is 0.7.

<h3>What is residual value?</h3>

The residual value is the estimated value which is calculated for the end of the lease terms for a fixed asset.

Points and their residual values are shown in the table. A 3-column table with 5 rows.

  •  x                               1,     2,     3,     4,     5.
  •  y                               2,   3.5,   5,    6.1,    8.
  • Residual Value       -0.4, 0.7,  -0.2, -0.6   0

The simple regression line can be represented as,

\hat y=\alpha +\beta X+\hat e

Here α is the constant, β is the slope and <em>e </em>is the residue.

The point which is farthest from the best fit of the line is 3.5. At y=3.5, the value of residue is 0.7.

Thus, the residual value, which is the farthest from the line of best fit for the table which shows points and their residual values, is 0.7.

Learn more about the residual value here;

brainly.com/question/1168961

6 0
2 years ago
What is the distributive property of 5(12x -3) -7(2x +1)
Fed [463]

Answer:

46x-22

Step-by-step explanation:

5(12x-3)-7(2x+1)

60x-15-14x-7

60x-14x-15-7

46x-15-7

46x-22

8 0
3 years ago
Read 2 more answers
Find the equation of the line passing through the points (3,-2) and (4,6) in slope intercept form.​
noname [10]

Hey!

------------------------------------------------

They already give us the slope, so we can solve the y-intercept.

We can use (3, -2).

y = 8x + b

-2 = 8(3) + b

-2 = 24 + b

-2 - 24 = 24 + b - 24

-26 = b

------------------------------------------------

Hence, the answer is \Large\boxed{\mathsf{y~=~8x~+~-26}}

------------------------------------------------

Hope This Helped! Good Luck!

4 0
3 years ago
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