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lidiya [134]
3 years ago
10

ILL GIVE BRAINLIEST

Mathematics
1 answer:
weqwewe [10]3 years ago
5 0

Answer:

See below

Step-by-step explanation:

I'll provide an example to help you. Let's say we were solving x^2+5x-7=0 and we wanted to factor the quadratic on the left side. We can't do that because the factors of -7 don't add up to 5. So we'd have to use the quadratic formula. The quadratic formula is essentially the last resort that will solve all quadratic equations, so it could be seen as a preferred method. But, unless you can factor the quadratic, it's much easier to solve.

Now let's do another one. x^2+5x+6=0 for example can be written as (x+2)(x+3)=0 and we can easily get x=-2 and x=-3 as solutions since plugging them into the factors would produce 0 (from the Zero Product Property). If we used the quadratic formula, it would take more time to plug in the variables and solve when we can just simply factor.

Hopefully, this explanation helps you to think of your discussion post!

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What condition renders this true, where S and T are sets?
daser333 [38]

Answer:

There are no sets S, T for which

S \cup T^c=S^c\cap T

holds

Step-by-step explanation:

Let the set A be

A=S\cup T^c

By de De Morgan's Law

A^c=S^c\cap ((T)^c)^c

But

((T)^c)^c=T

A^c=S^c\cap T

We conclude that

S \cup T^c=S^c\cap T\Rightarrow A=A^c

which is a contradiction because no set is equal to its complement.

3 0
3 years ago
You increase the amounts of ingredients in a recipe to make a proportional recipe. The original recipe uses three avocados and 0
butalik [34]

Answer:

9 : 1.5

9 avocados

Step-by-step explanation:

the original is 3:0.5, this means for every 3 avocados you need 0.5 cups of minced onions.

the new proportion would be ?:1.5

meaning it is not 9:1.5, since 1.5 is 3 times more than 0.5, therefore 3 avocados would also have to be multiplied by 3. giving you 9 avocados.

5 0
3 years ago
Cos45*/sec30*+cosec60*​
Lera25 [3.4K]

Answer:

= (√3+4√2)/2√6

Step-by-step explanation:

To evaluate cos45*/sec30*+cosec60*​

First according to trigonometry identity

sec 30 = 1/cos30

cosec 60 = 1/sin60

Substitute

cos45*/sec30*+cosec60*​

= cos45/(1/cos30) + 1/sin60

= cos45coss30 + 1/sin60

= 1/√2 * √3/2 + 1/(√3/2)

= √3/2√2 + 2/√3

= (√9+4√2)/2√6 +

= (√3+4√2)/2√6

7 0
3 years ago
Read 2 more answers
Aidan rode his bike 2.3 km from home to the library.Then he biked to the park.When he left home, his odometer read 293.8 km.When
Vinvika [58]

Answer:

308.2 - 293.8 = 14.4 km

14.4 - 2.3 = 12.1

So the library is 12.1 km from the park.

4 0
3 years ago
Ez20 chaarecter long
Likurg_2 [28]

Answer:

24 oz has the lowest cost per ounce.

Step-by-step explanation:

12 oz ---> $2.49

1 oz --> $2.49/12

1 oz --> $0.2075

14 oz --> $3.15

1 oz --> $3.15/14

1 oz --> $0.225

20 oz --> $5

1 oz --> $5/20

1 oz --> $0.25

24 oz --> $4.56

1 oz --> $4.56/24

1 oz --> $0.19  ..........this is the lowest cost per ounce

36 oz --> $7.2

1 oz --> $7.2/36

1 oz --> $0.2

5 0
3 years ago
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