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seropon [69]
3 years ago
13

Square root of -49 in terms of i

Mathematics
2 answers:
Vinil7 [7]3 years ago
7 0
It is -7i
Bye have a great days
katrin [286]3 years ago
5 0

Answer:

-7i

Step-by-step explanation:

7*7 = 49

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If these two shapes are similar, what is the measure of the missing length n?
scoundrel [369]

Answer:

39in.

Step-by-step explanation:

due to scale, cant be 15, as that would be the same length as other side

cant be 91 otherwise it wouldnt be similar if it had the same length as blue triangle which has 39 not 15 as the top side

3 0
3 years ago
Help me please i don't know what to do
astra-53 [7]

Answer:

a. a = 1, b = -5, c = -14

b. a = 1, b = -6, c = 9

c. a = -1, b = -1, c = -3

d. a = 1, b = 0, c = -1

e. a = 1, b = 0, c = -3

Step-by-step explanation:

a. x-ints at 7 and -2

this means that our quadratic equation must factor to:

(x-7)(x+2) = 0

FOIL:

x^2 + 2x - 7x - 14 = 0

Simplify:

x^2 - 5x - 14 = 0

a = 1, b = -5, c = -14

b. one x-int at 3

this means that the equation will factor to:

(x-3)^2=0

FOIL:

x^2 - 3x - 3x +9 = 0

Simplify:

x^2 - 6x + 9 = 0

a = 1, b = -6, c = 9

c. no x-int and negative y must be less than 0

This means that our vertex must be below the x-axis and our parabola must point down

There are many equations for this, but one could be:

-x^2-x-3=0

a = -1, b = -1, c = -3

d. one positive x-int, one negative x-int

We can use any x-intercepts, so let's just use -1 and 1

The equation will factor to:

(x+1)(x-1)=0

This is a perfect square

FOIL:

x^2-1=0

a = 1, b = 0, c = -1

e. x-int at \sqrt{3} , -\sqrt{3}

our equation will factor to:

(x+\sqrt{3} )(x-\sqrt{3)} =0

This is also a perfect square

FOIL and you will get:

x^2 - 3 = 0

a = 1, b = 0, c = -3

4 0
2 years ago
What is 10 + 10 help please make it for the dog
Nimfa-mama [501]
The answer to 10+10 is 20. I hope I made it for the dog.
4 0
3 years ago
Read 2 more answers
3629 you can use the digits twice make the largest four digit number​
Alex Ar [27]

Answer:

9632

or

9966

Step-by-step explanation:

im not 100% sure

3 0
3 years ago
Angela shared a cab with her friends. When they arrived at their destination, they evenly divided the $j fare among the 3 of the
igor_vitrenko [27]

Answer:

(j/3)+5

thats the answer

8 0
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