3 years ago

Just help me out with this

Mathematics

1 answer:

Liula [17]3 years ago

5 0

1st and 3rd and 4th are yes
2nd and 5th are totally incorrect

You might be interested in

5+2 root 3 / 7+4 root 3 =a-6root3

STALIN [3.7K]

Answer:

Step-by-step explanation:

$\dfrac{5+2\sqrt3}{7+4\sqrt3}\qquad\text{use}\ (a+b)(a-b)=a^2-b^2\\\\=\dfrac{5+2\sqrt3}{7+4\sqrt3}\cdot\dfrac{7-4\sqrt3}{7-4\sqrt3}=\dfrac{(5+2\sqrt3)(7-4\sqrt3)}{7^2-(4\sqrt3)^2}\qquad\text{use FOIL}\\\\=\dfrac{(5)(7)+(5)(-4\sqrt3)+(2\sqrt3)(7)+(2\sqrt3)(-4\sqrt3)}{49-4^2(\sqrt3)^2}\\\\=\dfrac{35-20\sqrt3+14\sqrt3-8(3)}{49-(16)(3)}=\dfrac{(35-24)+(-20\sqrt3+14\sqrt3)}{49-48}\\\\=\dfrac{11-6\sqrt3}{1}=11-6\sqrt3$

8 0

3 years ago

State whether the lines are parallel, perpendicular, or neither. Show your work.

taurus [48]

Answer:

-5y=-10x+100

y=2x-20

6y=-3x-7

y=-1/2x-7/6

Perpendicular because the slopes are opposite

7 0

3 years ago

Last one and im done so act fast

Natali5045456 [20]

Answer:

the answer is 22

Step-by-step explanation:

it just each time add 53

your welcome

4 0

3 years ago

Rounding in the calculation of monthly interest rates is discouraged. Such rounding can lead to answers different from those pre

Stella [2.4K]

Answer:

111.35

Step-by-step explanation:

effective rate: .085/12= .00708333333333

$3000=x\frac{1-(1+.00708333333333)^{-30}}{.00708333333333}\\x=111.35$

5 0

3 years ago

Enter an inequality that represents the description, and then solve.

natta225 [31]

Answer:

X >= 7

Step-by-step explanation:

7x + 8 >= 57

7x >= 57-8

7x >= 49

x >= 49/7

x >= 7

5 0

3 years ago

Just help me out with this ​

Just help me out with this