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3 years ago

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 plxxxx 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

$-x^{2}-19x-1=0$

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

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

Read 2 more answers

What is the value of x ?

Dafna1 [17]

Answer:

Step-by-step explanation:

Given: AC is angle bisector of <BAD.

=> So, <BAC = <CAD

30° = x-1 °

30 +1 = x

31 = x

Then, X = 31

Hope this helps.. Good luck :)

7 0

3 years ago