For i = -1, what is the sum (7 + 3i) + (-8 +91) ?

Mathematics

1 answer:

Lunna [17]3 years ago

8 0

Answer:

the answer to this question is 92

Step-by-step explanation:

(7+3-1) +(-8+91)

=7+2+-8+91

=92

You might be interested in

A semicircle has an area of 76.97 km² . Find its radius

vagabundo [1.1K]

Area of a semicircle = 1/2 πr²

1/2 πr² = 76.97

Multiply both sides by 2:
πr² = 153.94

Divide both sides by π:
r² = 49

Square root both sides:
r=√49

r = 7

Answer: r = 7

4 0

4 years ago

Read 2 more answers

Keisha makes a large sandwich for a family picnic. She takes 1/2 of the sandwich to the picnic.At the picnic, her family eats 3/

Vesna [10]

1/2 - 3/8 = 4/8 - 3/8 = 1/8
you have to find a common denominator before you can subtract. in this case it is 8

6 0

3 years ago

What are the answers to all of these questions?

VikaD [51]

We have that

N 11)
a) graph the equation y=x²-3x-10

using a graph tool
see the attached figure

b) Determine the roots of the equations
the roots of the equations are the values for y=0
x²-3x-10=0
x²-3x-10=(x+2)*(x-5)=0
the roots are
x1=-2
x2=5

see the attached figure problem 11

N 12) what is the value of x in the equation?
3x²=7x

3x²=7x-------> 3x²-7x=0--------> x*(3x-7)=0

x1=0
3x-7=0------> 3x=7------> x=7/3

the values of x are
x1=0
x2=7/3---> 2.33
see the attached figure problem 12

N 13) what is the value of x in the equation?
x²-5x=6----------> x²-5x-6=0
x²-5x-6=0-------> (x+1)*(x-6)=0
the values of x are
x1=-1
x2=6

N 14) what is the value of x in the equation?
2x²-5x=12--------> 2x²-5x-12=0

using a graph tool
see the attached figure problem N 14
2x²-5x-12=0----------> (x+3/2)*(x-4)=0

the values of x are
x1=-3/2
x2=4