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Sonbull [250]
3 years ago
8

Evaluate the square root of x^2 - 5x when x = 7. Round your answer to the nearest hundredth

Mathematics
2 answers:
Troyanec [42]3 years ago
5 0
X^2-5x, given x=7,

(7)^2-5(7)=14

sqrt(14)=3.74
sesenic [268]3 years ago
3 0
OK, <span>72</span>−<span><span>(5)</span><span>(7)</span></span><span>=<span>14
Its 14 because you plug in the sevens then you get 49-35 which is 14. Hope this answer helps you and mark as brainliest! :)</span></span>
You might be interested in
Which of the following points does not lie on the line whose equation is x+ y = 7?
makkiz [27]
The answer is <span>(-1, -6)
</span>
Let's go through all choices:
1. (x, y) = (-10, 17)
x + y = 7
-10 + 17 = 7
17 - 10 = 7
7 = 7
So, these points lie on the line.

2. (x, y) = (<span>13/3, 8/3)
</span>x + y = 7<span>
13/3 + 8/3 = 7
(13 + 8)/3 = 7
21/3 = 7
7 = 7
</span>So, these points lie on the line, too.

3. (x, y) = <span>(-1, -6)
</span>x + y = 7
-1 + (-6) = 7
-1 - 6 = 7
-7 ≠ 7
So, these points DO NOT lie on the line.
5 0
2 years ago
Given the function f(x) = 4(2)x, Section A is from x = 1 to x = 2 and Section B is from x = 3 to x = 4.
Dmitry [639]

Answer:

Step-by-step explanation:

I'm sure you want your functions to appear as perfectly formed as possible so that others can help you.  f(x) = 4(2)x should be written with the " ^ " sign to denote exponentation:  f(x) = 4(2)^x

                                                                                      f(b) - f(a)

The formula for "average rate of change" is a.r.c. = --------------

                                                                                           b - a

                                    change in function value

This is equivalent to  ---------------------------------------

                                            change in x value

For Section A:  x changes from 1 to 2 and the function changes from 4(2)^1 to  4(2)^2:  8 to 16.  Thus, "change in function value" is 8 for a 1-unit change in x from 1 to 2.  Thus, in this Section, the a.r.c. is:

                 8

               ------ = 8 units    (Section A)

                  1

Section B:  x changes from 3 to 4, a net change of 1 unit:  f(x) changes from

4(2)^3 to 4(2)^4, or 32 to 256, a net change of 224 units.  Thus, the a.r.c. is

        224 units

      ----------------- = 224 units (Section B)

            1 unit

The a.r.c for Section B is 28 times greater than the a.r.c. for Section A.

This change in outcome is so great because the function f(x) is an exponential function; as x increases in unit steps, the function increases much faster (we say "exponentially").

7 0
3 years ago
The unknown measures of one triangle are about:
olga_2 [115]
Answer: but I need the points sorri
8 0
3 years ago
Will mark brainliest for correct answer !!! &lt;3
jarptica [38.1K]

Answer:

Sudueuiwjdsvwjd dwksnswiwk

4 0
2 years ago
Read 2 more answers
Kevin wants to buy his mom a $35 necklace if the necklace is 40% off, how much will Kevin have to pay?
Sliva [168]

Answer:

21

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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