All categories

3 years ago

-3√45+3√20SHOW HOW YOU GOT YOUR ANSWER

Mathematics

1 answer:

Juli2301 [7.4K]3 years ago

4 0

-3√45 + 3√20 = -3√(9 · 5) + 3√(4 · 5) =

= -3√(3² · 5) + 3√(2² · 5) =

= -3 · 3√5 + 3 · 2√5 =

= -9√5 + 6√5 = -3√5 ← the end

You might be interested in

Write an equation of the line that passes through (2, -3) and is perpendicular to the line y=-2x-3

Natalija [7]

Answer:

$y=\frac{1}{2} (x-2)-3$ or $y=\frac{1}{2} x-4$

Step-by-step explanation:

The perpendicular slope is the opposite-reciprocal of the original slope:

Perpendicular slope of -2 is $\frac{1}{2}$

Write the equation in point-slope form ( $y=a(x-h)+k$ ):

$y=\frac{1}{2} (x-2)-3$

Convert to slope-intercept form if needed:

$y=\frac{1}{2} x-1-3$

$y=\frac{1}{2} x-4$

8 0

3 years ago

Read 2 more answers

if a scientist gets unexpected results during the first trail of an experiment what should he or she do next

Tasya [4]

If they get unexpected results they could note what they could've done wrong or what they could change in a next trail of experiments. Or look back and see what different happened to they could've hypothesized. There could be many different courses on what to do next.

4 0

2 years ago

If a=12 b=1 what is ab+20-b

Dmitriy789 [7]

Answer:

Step-by-step explanation:

(12)(1) + 20 - (1)

12 + 20 - 1

32 - 1

4 0

2 years ago

Read 2 more answers

These ordered pairs represent a function:(0,2), (1,-1), (2,-4), (3,-7). Write a function rule (equation) to represent this funct

inna [77]

Answer:

Step-by-step explanation:

I included the steps in the picture I attached. lmk if you need me to explain more

6 0

3 years ago

Given the two expressions shown below:

kobusy [5.1K]

<h2>Answer: A. Both are rational.</h2>

Step-by-step explanation:

Although both expressions have square roots, the result of each square root is an integer, which can be expressed as a fraction.

In this sense:

Rational numbers are all numbers that can be represented as the quotient (division) of two integer numbers. This means they can be represented as a fraction in which the denominator is nonzero.

If we solve both expressions, we will be able to see that the result is an integer that can be expressed as a fraction with two integers:

$\sqrt{4} + \sqrt{25}=2 + 5= 7$ The result is an integer

$7=\frac{7}{1}$

$\sqrt{4} + \sqrt{9}= 2 + 3=5$ The result is an integer

$5=\frac{5}{1}$

7 0

3 years ago

-3√45+3√20SHOW HOW YOU GOT YOUR ANSWER​

-3√45+3√20SHOW HOW YOU GOT YOUR ANSWER