Find a • b if a=3i+8j and b=-0.5-4j

Answers

Answer 1

Answer: -8j + 3i

Step-by-step explanation:

3i + 8j · (- 0.5) - 4j

3i-8j · 0.5 - 4j

3i-4j-4j

3i-8j

-8j+3i

Hope this helps

Answer 2

Answer:

−1.5i−12ij−4j−32j2

Step-by-step explanation:


Related Questions

Okay I don't know this one either so uh help please

Answers

9514 1404 393

Answer:

  (a)  A'(-2, 1), B'(-4, -3), C'(-7, 0)

Step-by-step explanation:

If X is the center of rotation, the coordinates of point P are transformed like this:

  P' = -(P -X) +X

  P' = 2X -P

  (x, y) ⇒ (2(-5) -x, 2(3) -y)

  (x, y) ⇒ (-10-x, 6-y)

__

Your points are transformed to ...

  A(-8, 5) ⇒ (-10-(-8), 6-5) = A'(-2, 1)

  B(-6, 9) ⇒ (-10-(-6), 6-9) = B'(-4, -3)

  C(-3, 6) ⇒ (-10-(-3), 6-6) = C'(-7, 0)

These coordinates match the first choice.

7=100z what does z equal?

Answers

Answer:

z = 7/100

Step-by-step explanation:

Answer:

Step-by-step explanation:

7/100z

Which point is on the graph of f(x)=2x5^x

Answers

Answer: 1, 10



Step by step explanation:

FInd the value of x/

Answers

Answer:

x=18

Step-by-step explanation:

Mike has $72 and he needs to buy some apples. Which of these equations would represent mike's situation of the apples cost $0.60 per apple and he wanted to find out how many apples he could buy

Answers

Answer:

120 apples

Step-by-step explanation:

Given data

Total amount= $72

Cost per apple = $0.60

The number of apples = Total amount/Cost per apple

substitute

The number of apples= 72/0.6

The number of apples= 120 apples

Hence he will buy 120 apples

(Find the commission.)

Earning Commission
Sales CommisionRate Commission $640 4% ?

The commission is $ ?​

Answers

Answer:

25.6

Step-by-step explanation:

640*4%

Answer:

the commsion is $25.60

Step-by-step explanation:

commission amount = sale price * commission percentage / 100.

angle sum theory

PLS HELP!!

A)74°

B)92°

C)83°

D)82°

Answers

Answer:

the answer must be 74 or 82

Answer:

It's 58

Step-by-step explanation:

That's the answer

what does a square pluse be square

Answers

Answer:

a squared + b squared = c square

Step-by-step explanation:

In this formula c represents the length of the hypotenuse a and b are the legnths of the other two sides. if two sides of a right triangle are known you can subsitute these values in the formula to find the missing side

56 + (-56)
Find each sum

Answers

Answer:It equals 0.

Step-by-step explanation:

Because the 56 in parenthesis is a negative so when you add it equals nothing.

Pleaseee helppp answer correctly !!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!

Answers

Answer:

perimeter of any figure can be define the sum of all sides.

perimeter of the figure=33.4ft + 6.5ft + 9ft + 9ft + 9ft + 6.5ft + 7.7ft + 16.7ft

perimeter of the figure=97.8 ft.

Malala is following this recipe for bread rolls.
She uses 500 mL of water.
How much of each of the other ingredients does she use?

Recipe: Makes 15 bread rolls
480 g flour
12 g salt
6 g yeast
30 mL oil
600 mL water

Answers

Answer:

500ml water

400 g flour

2 g salt

5 g yeast

25ml oil

Step-by-step explanation:

Noah ran 54 miles in 9 days.The graph relating Greta’s total distance to the number of days passes through the points (0,0) and (5,45).Who ran more miles per day?

Answers

Answer: Noah ran more miles

Step-by-step explanation:

The heights of Russian dolls are in the ratio 6 : 8 : 9. In a set of dolls, the height of the middle doll is 12 cm. What is the height of the smallest doll

Answers

Answer:

Step-by-step explanation:

As 6 is 2 less than 8 so height of smallest doll would be 10cm

12 divided by 8 is 1.5 then multiply that by 6 to get 9

what is the number sentence​

Answers

Answer:

A number sentence is a mathematical sentence made up of numbers and signs. So for example 15 + 7.

They can use any of the mathematical operations so addition, subtraction, multiplication and division

Number sentences can be true or false. Example, 5 + 7 = 13

good luck, i hope this helps :)

If y varies directly with x, and y is 3 when x is 9, find x when y is 12.​

Answers

Answer:

x=4

Step-by-step explanation:

Answer:

9/3=3

12/3=4

step-by-step explanation:

I think it's four but sorry if its not

is y=6x+3 proportional or nonproportional

Answers

Answer:

f the x and y coordinates form proportional relationships, then there is some non-changing number (a constant) that when multiplied times x will create y

Step-by-step explanation:

Find the unknow measures of y and x.​

Answers

9514 1404 393

Answer:

  x = 2 m

  y = 30°

Step-by-step explanation:

The side lengths of ΔDEF are 3/9 = 1/3 of those of ΔABC.

  x = DF = 1/3(AB) = (1/3)(6 m)

  x = 2 m

__

Angle measures of ΔDEF are the same as those of the corresponding angles of ΔABC.

  y = ∠B = ∠E = 30°

  y = 30°

Where will Jack and Nolan meet​

Answers

I got 2.8 and 5.4 because they don’t directly meet where I graphed it.

Gary is building a new L-shaped desk for his room. He wants to make sure it
is large enough to hold all his supplies. The dimensions of the desk, in feet,
are shown in the diagram. What is the area of the desk?
9 ft
2 ft
6 ft
6 ft
4 ft
3 ft
A. 24 square feet
B. 36 square feet
C. 30 square feet
D. 54 square feet

Answers

Answer:

30ft2.  so its c

Step-by-step explanation:

its 30

quiz verified

What is the gcf of 10m^3 +45m

Answers

Answer:

ITS 1

10 = 2 • 5

   3 = 3

   45 = 32 • 5

Answer:

GCF of 40 and 60

Step-by-step explanation:

Solution We first express 20 and 60 as the product of prime numbers 40 = 2 × 2 × 2 × 5 60 = 2 × 2 × 3 × 5. The common factors are 2 × 2 and 5.

which number is halfway between 318970 and 719070​

Answers

Answer:

it is 519020

Step-by-step explanation:

PLSPSPSLS HELP MATHHH GRADE 5-6

Answers

median: 80
lower quartile: 65
upper quartile: 95

A small plane has 20 rows of seats. Each row has 4 seats.
help me plz!

Answers

Answer:

there are 5 sections

Step-by-step explanation:

and how you want us to help?:))

4/5 cm * 3/8 cm
please answer fast ​

Answers

Answer:

= 3/10 cm or you can put 0.3 cm

What is the slope that passes through the points(-2,4) and (3,8). m=

Answers

Please Mark as brainlist ..........

Solve:
5x-2y = 6
5x-2y = -4

Please show your work or explain what method you used to solve it (substitution, graphing, or elimination)

Answers

No solution they are the same equation with different answer so there can’t be an answer

the breadth of a rectangular handkerchief is 10 cm shorter than its length .if the perimeter of the handkerchief is 100cm. find its length and breadth..
plz help me​

Answers

Step-by-step explanation:

Perimeter = 2(l+b)

2(x+x-10)=100cm

(x+x-10)= 100 divided by 2

(x+x-10)=50

2x-10=50

2x=50+10,60

x=60 divided by 2

X =30

Length = 30cm

Breadth= 30-10= 20cm

PLEASE MARK MY ANSWER AS THE BRAINILIEST!

Answer:

solution given:

length[l]=xcm(let)

breadth [b]=(x-10)cm

perimeter of rectangle [P]=100cm

we have

P=2[l+b]

100cm=2[x+x-10]

2x-10=[tex] \frac{100}{2} [/tex]

2x=50+10

x=[tex] \frac{60}{2} [/tex]

:.x=30cm

So

length[l]=x=30cm

breadth [b]=(x-10)=30-10=20cm

Mr. Greene
purchased 6 movie
tickets for $57.30.
How much does
one movie ticket
cost?

Answers

Answer:

Each ticket costs $9.55

Step-by-step explanation:

You divide 57.30 by the number of tickets(6).  

57.30/6 = 9.55

Answer:

6 movie = $57.30

1 movie = $x

57.30 ÷ 6

=  $9.55 for one movie ticet

Step-by-step explanation:

The ratio of the perimeter of a square A and square B is 4:3. The side of square B is 3 m less than the side
of square A. What is the length of the side of square A?
please answer

Answers

Answer:

x = 12

Step-by-step explanation:

x = length of side of square A

'x-3' represents length of side of square B

Perimeter of square A = 4x

Perimeter of square A = 4x - 12

we can set up the following proportion based on ratio of 4:3

4x / 4 = 4x - 12 / 3

cross-multiply:

4(3x) = 4(4x-12)

12x = 16x - 48

-4x = -48

x = 12

Which of the following best describes the relationship between the number of miles a person runs and the number of calories he/she burns?

A. neither correlation nor causation
B. correlation and causation
C. correlation without causation
D. causation without correlation

Answers

B
Because the number are either rising or falling
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