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dybincka [34]
3 years ago
13

I need help please thanks​

Mathematics
1 answer:
slava [35]3 years ago
6 0

Answer:

1/7

Step-by-step explanation:

x^(-1) means to find the reciprocal of number x

so 7^(-1) = 1/7

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Is (3,9) a solution of the system
Verdich [7]
Yes it because any function can be a solution to any certain number of different systems
6 0
3 years ago
How many real roots does the function
icang [17]

Answer:

Option C is correct i.e. 2.

Step-by-step explanation:

Given the function is f(x) = x² +8x -2.

We can compare it with general quadratic expression i.e. ax² +bx +c.

Then a = 1, b = 8, c = -2.

We can find the number of real root by finding discriminant of the equation ax² +bx +c =0 as follows:-

D = b² -4ac

D = 8² -4*1*-2

D = 64 +8

D = 72.

When D is a positive value, then we have two real roots of the equation.

Hence, option C is correct i.e. 2.

6 0
3 years ago
A small explanation would be really appreciated​
shutvik [7]

Step-by-step explanation:

the 2 angles marked with orange and green are equal becos the question said that the indicated angles are congruent meaning same deg. so 180 - that given angle = the 2 marked angles (based on the rule known as angles on a str line are supplementary)

since the 2 marked angles are same, you can say that d and k are parallel due to the rule of alternate angles

Topic: angle properties

If you like to venture further, feel free to check out my insta (learntionary). It would be best if you could give it a follow. I'll be constantly posting math tips and notes! Thanks!

7 0
3 years ago
Vertex of f(x) = 1/2(x-2)^2-3
AlekseyPX
Vertex is (2,-3). H (which is 2) sign is always opposite and k stays the same
3 0
3 years ago
I need help with this​
VLD [36.1K]

Answer:

im sorry wish i could

Step-by-step explanation:

4 0
3 years ago
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