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Svetach [21]
2 years ago
14

Help me please it's a quiz

Mathematics
1 answer:
lesya692 [45]2 years ago
7 0

Answer:

8000in³

Step-by-step explanation:

20³=20*20*20=8000

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Consider the function f(x)=-3x^2 +7x -k. [3 Marks] a) For what values of k will the function have no zeros? b) For what values o
Anna35 [415]

Answer: a) k >4.08

b) k = 4.08

c) k<4.08

Step-by-step explanation:

Since we have given that

f(x)=-3x^2+7x-k

a) For what values of k will the function have no zeros?

It mean it has no real zeroes i.e. Discriminant < 0

As we know that

D=b^2-4ac

Here, a =-3

b = 7

c = -k

So, it becomes,

D

b) For what values of k will the function have one zero?

It means it has one real root i.e equal roots.

So, in this case, D = 0

So, it becomes,

D=b^2-4ac=0\\\\D=7^2-4\times -3\times -k=0\\\\49-12k=0\\\\49=12k\\\\k=\dfrac{49}{12}\\\\k=4.08

c) For what values of k will the function have two zeros?

It means it has two real roots.

In this case, D>0

So, it becomes,

D=7^2-4\times -3\times -k>0\\\\49-12k>0\\\\-12k>-49\\\\12k

Hence, a) k >4.08

b) k = 4.08

c) k<4.08

3 0
3 years ago
Neeeeeeeeeeed helpppppppppp
dlinn [17]

The answer is true.

Complementary = 90

Supplementary = 180

7 0
3 years ago
Read 2 more answers
If the function f(x)=x^3 has the domain {-3, 0, 2, 4}, what is its range?
mash [69]

Answer: {-16,4,92}. 2) {-16,10 ,42}. 3) {0,10,42}. 4) {0,4,92}. 5 The function f(x) = 2x. 2 + 6x - 12 has a domain.

Step-by-step explanation:

8 0
3 years ago
15n + 24 - 4(n - 3) + 6 - 2n = 105
elena55 [62]

Just trying to win the CONTEST BUT GOOOOD LUCK

7 0
3 years ago
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What x what gives me 49 but when you add it it gives me 14
Scilla [17]
7 because 7 x 7 is 49 but if you add 7 and 7 it gets to 14 7 is the answer
so if you do a different number you will be wrong

3 0
3 years ago
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