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3 years ago

Multiply (2 – 7i)(–1 + 4i). 26 + 15i –2 – 28i 26 + i –30 + 15i

Mathematics

2 answers:

vaieri [72.5K]3 years ago

8 0

Answer: its 26+15i

Step-by-step explanation:

on e2020

DENIUS [597]3 years ago

3 0

(2 - 7 i) (-1 + 4 i).26 - (32 + 697 i)

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April had

Bumek [7]

First thing First. You must find have a common denominator. If you want to find it then you do this

3: 3 6 9 12 15 18 21
7: 7 14 21 28

Once you found a number they have in common (21) You do this next

3/7 * 3/3 = 9/21
2/3 * 7/7 = 14/21

Now the next thing you do is subtract your numerators but not the denominators

14-9=5

5/12

you cant simplified so your done! Hope this helps!!!! <span />

3 0

2 years ago

-3/5*1/8 as fraction as the anwers

ahrayia [7]

How to get answer:

$\mathrm{Multiply\:fractions}:\quad \frac{a}{b}\cdot \frac{c}{d}=\frac{a\:\cdot \:c}{b\:\cdot \:d}\\=-\frac{3\cdot \:1}{5\cdot \:8}\\\mathrm{Multiply\:the\:numbers:}\:3\cdot \:1=3\\=-\frac{3}{5\cdot \:8}\\\mathrm{Multiply\:the\:numbers:}\:5\cdot \:8=40\\=-\frac{3}{40}$

4 0

3 years ago

Read 2 more answers

Anybody know the answer??

Nady [450]

If you solve for theta, it would be 3pi/4

4 0

2 years ago

Read 2 more answers

Tickets to a school play cost $3 for students and $8 for adults. On opening night, $1000 was collected and 150 tickets sold. How

vesna_86 [32]

Let the number of students who bought tickets be s,
Let the number of adults who bought tickets be a,

Equation 1:

$3s \: + \: 8a \: = \: 1000$

Equation 2:

$s \: + \: a \: = \: 150 \\ s \: = \: 150 \: - \: a$

Substitute ( 2 ) into ( 1 ),

$3(150 \: - \: a) \: + \: 8a \: = \: 1000 \\ 450 \: - \: 3a \: + \: 8a \: = \: 1000 \\ 5a \: = \: 550 \\ a \: = \: 110$

Substitute a = 110 into ( 2 ),

$s \: + \: 110 \: = \: 150 \\ s \: = \: 40$

Ans: 40 Student Tickets, 110 Adult Tickets

7 0

2 years ago

What is the value of x? <br> X=

brilliants [131]

Answer:

x=7

step-by-step explanation:

$\frac{5}{40} = \frac{3}{2x + 10}$

5(2x+10) =3×40

10x + 50 = 120

10x =120-50= 70

x = 70/10= 7

5 0

2 years ago