MATHEMATICS MIDDLE SCHOOL

What is the sum of the complex numbers below? 4−7i and −3+5i a −i
b 1+2i
c 3
d 1−2i

Answers

Answer 1
Answer:

Answer:

D. 1-2i is your answer.

Step-by-step explanation:

What you're doing is adding them together.

4 + -3 + -7i + 5i = 1-2i

D. 1-2i is your answer.

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Kayla buys a shirt for 8.19. she pays with a $10 bill. how much change should she receive? tell meh plz :D

Answers

10-8.19=1.81
just use subtraction
the answer is $1.81 welcome

Which shape must have opposite sides that are parallel and congruent, and diagonals that are perpendicular

Answers

A square is the answer

calvin paints pictures and sells them at art shows. He charges $56.25 for a large painting. He charges $25.80 for a small painting. Last month he sold six large paintings and three small paintings. How much did he make in all?

Answers

The amount last month Calvin made from all the paintings sold at the art shows was $414.90

The first analyse the given information;

→ Small paints (lets call them ) sell for $25.80 Per Painting,

Thus 25.80s gives as the profit for  number paints sold.

Large paints (lets call them ) sell for $56.25 Per Painting,

Thus, 56.25s gives as the profit for  number paints sold.

Thus the total profit of all paintings sold would be;

= 56.25×6 + 25.80×3

= $414.90

Therefore,  last month Calvin made $414.90 from all the paintings sold at the art shows.
$414.90 bc 56.25×6 + 25.80×3

The prism has a surface area of 1312 mm2.What would the surface area of the prism be if each dimension were halved?


mm2

Prism with a length of thirty-two millimeters, a width of ten millimeters, and a height eight millimeters

Answers

Surface Area = 2(lw + lh + wh)

Divide each dimension by half, and then plug it in to the formula.

32/2 = 18
10/2 = 5
8/2 = 4

Surface Area = 2((4)(5) + (4)(18) + (5)(18))
SA = 2(20 + 72 + 90)
SA = 2(182)

SA = 364

The surface area if each dimension was halved would be 364 mm^2.

amy had homework for math, science, and history. She spent 1/3 of her time working on math and 1/4 of her time working on science. Question is Amy estimated that she spent 1/7of her time on both math and science homework. Without doing any calculations, determine whether or not Amy's estimate is accurate & explain why or why not.

Answers

she is incorrect. the denominator, 7, is neither a multiple or factor of the denominators 3 and 4.
It's Wrong Because 7 Isn't The GCF Between 3 & 4 Plus You Can't Add The Denominator If It's Not The Same Number

Another question! A piece of fabric costs $5.29 a yard, which is an estimate cost of 16.3yards of fabric?
A. $ 21
B. $ 80
C. $ 165
D. $ 800

Answers

Answer:

B.)$80

5.29 times 16.3 is 86.227 but it is not close to 21 not 165 and not a 800 so the answer would be 80

Answer:

B.

Step-by-step explanation:

If we round 5.29 to 5, and 16.3 to 16,

5 x 16 = 80.

Therefore it's B.

Hope I helped! Please leave a comment or rating plz!
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