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konstantin123 [22]
2 years ago
14

Evaluate 1/x^-2 for x= 7. -49 49 1/49 Please help And thx but HURRY

Mathematics
2 answers:
Oxana [17]2 years ago
8 0

Answer:

49

Step-by-step explanation:

<u />

Simplify the expression such that the variable has a positive exponent.

  • \frac{1}{x^{-2} }
  • x² [negative exponent is taken to the other side]

Substitute x = 7.

  • (7)²
  • 49
ella [17]2 years ago
5 0
Answer: 49

Step-by-Step Explanation:

As we can see, we have been given a negative exponent for “x”. Hence we have to take the reciprocal which would be x squared.


Therefore, x = 7
= x^2 = 7 * 7
= 49
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The graph shows how the height of a balloon is changing over time.
Inessa05 [86]

Answer:

B. The rate at which the balloon is rising.

Step-by-step explanation:

Mathematically speaking, the slope of the line represents the change in dependent variable (Height) divided by the change in independent variable (Time). According to the graph, a postive change in time leads to a positive change in height, meaning that slope is positive. Physically speaking, the slope represents the rate of change at which the height of the ballon is rising.

Hence, correct answer is B.

8 0
3 years ago
3 is what percent of 5?
kkurt [141]
  • <em>Answer:</em>

<em>60%</em>

  • <em>Step-by-step explanation:</em>

<em>Hi there ! </em>

<em>5 ........... 100%</em>

<em>3 .................x%</em>

<em>x = 3×100/5</em>

<em>= 300/5</em>

<em>= 60%</em>

<em>Good luck ! </em>

8 0
3 years ago
Aidan drives to school and back each day. The school is 16 miles from his home. He averages 40 miles per hour on his way to scho
evablogger [386]
The correct answer is 40 miles per hour because it would be the same as on the way to school as it is on the way home

3 0
3 years ago
I NEED THE ANSWER QUICK
gladu [14]

9514 1404 393

Answer:

  4^0

Step-by-step explanation:

The rules of exponents are ...

  (a^b)(a^c) = a^(b+c)

  (a^b)/(a^c) = a^(b-c)

So, your expression simplifies to ...

  4^5\times4^{-7}\div4^{-2}=4^{5-7-(-2)}=\boxed{4^0}

6 0
3 years ago
Pleaseeeeeeee I need help nowwwww
Tanya [424]

Answer:

(2)

Step-by-step explanation:

One property of a parallelogram is

• opposite angles are congruent, hence

∠L = ∠N and ∠M = ∠P

Using ∠L = ∠N, then

8x - 41 = 6x + 3 ( subtract 6x from both sides )

2x - 41 = 3 ( add 41 to both sides )

2x = 44 ( divide both sides by 2 )

x = 22

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

∠M = 2x + 1 = (2 × 22) + 1 = 44 + 1 = 45°

∠P = ∠M = 45° → (2)

6 0
4 years ago
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