Question

Need some help with some questions:

1) What is the simplified form of:
$\sqrt{8} + 5 \sqrt{2}$

2) Which fraction is equal to:
$\frac{ \sqrt{3} + \sqrt{5} }{ \sqrt{3} }$

A.
$3 + \sqrt{5}$
B.
$\frac{2 \sqrt{3} + \sqrt{5} }{ \sqrt{3} }$
C.
$\frac{3 + \sqrt{15} }{3}$
D.
$\frac{3 + \sqrt{5} }{3}$

3) How many solutions are there for x if
$y = {x}^{2} - 2 \: and \: 2x + y + 6 = 0$


4) Which equation has no simultaneous solution with:
$y = {x}^{2} + 4$
A.
$x = - 3$
B.
$y = x + 4$
C.
$y = 3x + 2$
D.
$y = 2 - x {}^{2}$


5) Which one of these expressions is not rational?

A.
$2 \sqrt{3} \times \sqrt{27}$
B.
$\frac{2}{ \sqrt{8} } \times \sqrt{18}$
C.
$\frac{3 \sqrt{42} }{ \sqrt{3} }$
D.
$\sqrt{ \frac{4}{9} }$


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Answer 1

Answer:

Question 1) 7 root 2

Question 2 ) c

Question 3) ?

Question 4) A

Question ) D

Answer 2

Answer:

1) 7 Root 2

2) C

3) 4

4) A

5) D

Step-by-step explanation: