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VMariaS [17]
3 years ago
15

Which expression is equal to 4√20 - 3√45

Mathematics
1 answer:
zheka24 [161]3 years ago
3 0

Answer:

D.−√5

Step-by-step explanation:

4 sqrt(20) -3 sqrt(45)

We know that sqrt(ab) = sqrt(a) sqrt(b)

4 sqrt(4) sqrt(5) - 3 sqrt(9) sqrt(5)

4 *2 sqrt(5) - 3 *3 sqrt(5)

8 sqrt(5) - 9 sqrt(5)

- sqrt(5)

You might be interested in
The list below shows the different taco shells, fillings, and toppings sold at Rico's Taco Bar.
Pepsi [2]

Answer:

30 different types of tacos can Rico make.

Step-by-step explanation:

Given - The list below shows the different taco shells, fillings, and toppings sold at Rico's Taco Bar.

Taco Shells                 Fillings                           Toppings

Soft                              Chicken                           Cheese

Hard                             Beef                                 Lettuce

                                    Bean                               Sour Cream                      

                                                                           Onions  

                                                                            Salsa

To find - How many different types of tacos can Rico make using one taco shell, one filling, and one topping?

Proof -

Given that,

There are 2 different types of Taco shells, 3 different type of fillings and 5 different types of toppings.

So, by the fundamental principal of counting,

Total types of tacos Rico made = 2 × 3 ×5 = 30

7 0
3 years ago
Find the value of 10! / (10-2) !
Gnesinka [82]

Answer:

90

Step-by-step explanation:

10! / (10 - 2)!

=10!/8!

=10 * 9 * 8! /8!

=90 * 8!/8!

90

Hope this helps. Please mark as brainliest if possible. Have a nice day

3 0
3 years ago
Simplify 2(x + y) + 3(x + y). <br> 2xy + 3xy <br> 5xy <br> 5x + 5y
Flauer [41]
2(x + y) + 3(x + y)

first distribute:
(multiply 2 into everything in the first parenthesis, and 3 into everything in the second)
2x + 2y + 3x + 3y
Second simplify (add all like terms (adding in this case) )
(2x + 3x) + (2y +3y)
5x + 5y

your answer is: 5x + 5y

hope this helps
6 0
4 years ago
Read 2 more answers
Factorize x^2/16+xy+4y^2​
lisov135 [29]

Answer:

\frac{x^2}{16} +xy+4y^2 can be factored out as: (\frac{x}{4} +2\,y)^2

Step-by-step explanation:

Recall the formula for the perfect square of a binomial :

(a+b)^2=a^2+2ab+b^2

Now, let's try to identify the values of a and b in the given trinomial.

Notice that the first term and the last term are perfect squares:

\frac{x^2}{16} = (\frac{x}{4} )^2\\4y^2=(2y)^2

so, we can investigate what the middle term would be considering our a=\frac{x}{4}, and b=2y:

2\,a\,b=2\,(\frac{x}{4}) \,(2\,y)=x\,y

Therefore, the calculated middle term agrees with the given middle term, so we can conclude that this trinomial is the perfect square of the binomial:

(\frac{x}{4} +2\,y)^2

4 0
3 years ago
Help!<br>What is the answer to this question?<br><br>​
Nadya [2.5K]

Answer:

D

Step-by-step explanation:

8 0
3 years ago
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