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Dafna11 [192]
3 years ago
12

Determine whether the statement is true or false.

Mathematics
2 answers:
Vsevolod [243]3 years ago
8 0

Answer:

True

Step-by-step explanation:

The negative power property of exponents says that:

x^{-n}=\frac{1}{x^n}

And vice versa:

\frac{1}{x^{-n}}=x^n

Therefore, since our exponent is negative, we can change it to positive if we put it in the numerator. In other words:

\frac{1}{3^{-4}}=3^4

The statement is true.

amid [387]3 years ago
5 0

Answer:

False

Step-by-step explanation:

1/3^4=3^4

0.012346≠81

False

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What is the percent decrease from 95 to 68 round to the nearest percent
Setler79 [48]

The decrease is  (95-68) = 27 .

As a fraction, the decrease is  27/95  of the original amount.

To change any fraction to a decimal, do the division:

                            (27)  divided by  (95) = 0.2842...

To change any decimal to a percentage, move the

decimal point two places that ==> way:

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2 years ago
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Find the solution of the system of equations.<br><br> x-y=-3<br>-8x+y=45
mezya [45]

Answer:

x = 17, y = 28

Step-by-step explanation:

1. Isolate for x in "x - y = -3, -8":

x - y+y = -3, -8+y

x = -11 + y

2. Substitute "x = -11 + y" in for x in the second expression:

-11 + y + y = 45

3. Simplify:

-11 + 2y = 45

4. Isolate y:

-11+11 +2y = 45+11

2y = 56

\frac{2y}{2} = \frac{56}{2}

y = 28

5. Substitute the new y-value into the first equation:

x = -11 + 28

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hope this helps!

5 0
1 year ago
How many tablespoons is one dose
allochka39001 [22]

Answer:

usually 2 depending on age

7 0
2 years ago
Kate has 21 coins (nickels and dimes) in her purse. How many nickels and dimes does she have if she has $1.50? 3 nickels and 18
Brut [27]
It would be 12 nickels and 9 dimes

4 0
3 years ago
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Write an equation perpendicular to the line y = 3x + 5 through the point (6, -5). State your answer as y=mx+b.
liubo4ka [24]

Answer:

y=(-1/3) x - 3

Step-by-step explanation:

A line that is perpendicular to it has a slope that is an opposite reciprocal, which in this case is -1/3.  Now you use point slope form which is y-y1=m(x-x1) that would be y+5=-1/3(x-6).  Distribute the -1/3 and get y+5= -1/3 x+ 2.  Subtract 5 from both sides and get y=-1/3 x - 3

3 0
3 years ago
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