Question

Help me plz 50 points and ill give brainliest if you answer all​

Answer 1

Answer:

11) $2x=-4$

Divide both sides by 2:

$\frac{2x}{2}=\frac{-4}{2}$

$x=-2$

12) $2^3\cdot \:2^1=2^{3+1}=2^4$

($2^4=16)$ if you wanted the exact value.

13) $-3+10=x$

Switch sides:

$x=-3+10$

Rearrange:

$x=10-3$

$x=7$

14) $10^2-64$

$10*10-64$

$100-64$

$36$

15) $\sqrt{100}-5^2$

$10-5^2$

$10-5*5$

$10-25$

$-15$

16) $\frac{1}{4}x=-10$

Multiply both sides by 4:

$4\cdot \frac{1}{4}x=4\left(-10\right)$

$x=-40$

17) $\left(2^3\right)^2=2^{3*2}=2^6$

$(2^6=64)$ if you wanted the exact value.

18) $\left(2^3\right)\left(2^2\right)=2^{3+2}=2^5$

$(2^5=32)$ if you wanted the exact value.

Bonus Question:

Terrorist attacks took place against the United States in September 11 2001.

This is named "September 11 attacks" and you can search more about it online.

Answer 2

Answer:

10. x = -2

12. 16

13. x = 7

14. 36

15. -15

16.  x = -40

17. 64

18. 32

Friday 9/11 The plane hijackings that struck the World Trade Center, the Pentagon, and a Pennsylvania field killed 2,977 people.

Step-by-step explanation: