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erastova [34]
3 years ago
15

How is the expression 7^-4 written using a positive exponent?

Mathematics
1 answer:
Pavlova-9 [17]3 years ago
4 0
It would be written as a fraction to make the exponent negative put it over one : 1/7^4
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Help<br><br><br><br><br><br> plxxxx<br><br><br><br><br><br> thank you
Alecsey [184]
240 I believe



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5 0
2 years ago
The shapes below are similar. What does x have to be?
laila [671]
I think it is 3.5
if 8 is divided by 4, you get two since they are the same shape, 14 should be divided by 4 as well which is 3.5
7 0
3 years ago
Read 2 more answers
Which are the solutions of x2 = 19x + 1?
Finger [1]

Answer:

(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})

Step-by-step explanation:

we have

x^2=19x+1

we know that

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}

in this problem we have

-x^{2}-19x-1=0  

so

a=1\\b=-19\\c=-1

substitute in the formula

x=\frac{-(-19)\pm\sqrt{-19^{2}-4(1)(-1)}} {2(1)}

x=\frac{19\pm\sqrt{365}} {2}

x=\frac{19+\sqrt{365}} {2}

x=\frac{19-\sqrt{365}} {2}

(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})

therefore

StartFraction 19 minus StartRoot 365 EndRoot Over 2 EndFraction comma StartFraction 19 + StartRoot 365 EndRoot Over 2 EndFraction

6 0
3 years ago
Read 2 more answers
At 6:00 p.m. the temperature was –5°F outside. By midnight the temperature had dropped 12 degrees. What was the temperature at m
USPshnik [31]
-5 - 12 = -17

Starts at -5 degrees, then it drops another 12, so you subtract 12 from -5.
6 0
3 years ago
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What is the value of x ?
Dafna1 [17]

Answer:

<h2>X = 31°</h2>

Step-by-step explanation:

Given: AC is angle bisector of <BAD.

=> So, <BAC = <CAD

30° = x-1 °

30 +1 = x

31 = x

Then,<u> X = 31</u>

<em>Hope</em><em> </em><em>this helps</em><em>.</em><em>.</em><em> </em><em>Good</em><em> </em><em>luck</em><em> </em><em>:</em><em>)</em><em> </em>

7 0
3 years ago
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