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3 years ago

Please help me on this. 18 pts.

Mathematics

1 answer:

Dovator [93]3 years ago

6 0

We can’t see half of it sorry

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Please answer this question

Vladimir [108]

Answer:

a = 3/2
b = -1/2

Step-by-step explanation:

$\dfrac{\sqrt{5}-1}{\sqrt{5}+1}=\dfrac{(\sqrt{5}-1)(\sqrt{5}-1)}{(\sqrt{5}+1)(\sqrt{5}-1)}\\\\=\dfrac{5-2\sqrt{5}+1}{5-1}=\dfrac{6-2\sqrt{5}}{4}\\\\=\dfrac{3}{2}-\dfrac{1}{2}\sqrt{5}$

Comparing this to the form a+b√5, we see that ...

a = 3/2

b = -1/2

8 0

3 years ago

Estimate the difference 610-187

Tresset [83]

610-187 is 423 but when you estimate it would be 400 this is your answer

3 0

3 years ago

Read 2 more answers

PLZ HELP ME Solve -2z – 5 > 3 for z.

Evgen [1.6K]

Answer:

z<-4

Step-by-step explanation:

-2z-5>3

Add 5 to both sides.

-2z>8

Divide both sides by -2.

Z<-4

The sign must change because you are dividing by a negative.

7 0

3 years ago

Hey can you help me fast I need to get this grade to a 90 by 12:00 I have an 83 rn.

Nesterboy [21]

Answer:

30/50

Step-by-step explanation:

because there is a y distance of 30 and x distance of 50 from point to point.

3 0

2 years ago

84. Use properties of exponents to rewrite each expression with only positive, rational exponents. Then find the numerical value

Yakvenalex [24]

Answer:

a) 1/27

b) 16

c) 1/8

Step-by-step explanation:

a) $x^{-3/2}$

One of the properties of the exponents tells us that when we have a negative exponent we can express it in terms of its positive exponent by turning it into the denominator (and changing its sign), so we would have:

$x^{-3/2}=\frac{1}{x^{3/2} }$