Mathematics Middle School

how do you find the area of a triagnle and a rhombus in gerneral
​

Answers

Answer 1

The area of a triangle is calculated using 1/2b*h, where b = the base and h = the height

The area of a rhombus is calculated using pq/2, where p and q equal the length of the diagonals from opposite points.

Related Questions

is math related to solar system

Answers

Answer:

Sis what I'm not really good at this stuff but I'm pretty sure like only 0.1 of the stuff you learn in science will involve math so I'd say no

Step-by-step explanation:

it's free real estate

Answer:

Yes it is. Math is used everywhere in the solar system!

Step-by-step explanation:

Math can be used to find distance between planets or gravity and/ or gasses there is in one planet.

The selling price of an item is ​$390. It is marked down by ​10%, but this sale price is still marked up from the cost of ​$270. Find the markup from cost to sale price.

Answers

Answer:

find the actual discount, multiply the discount rate by the original amount 'x'. To find the sale price, subtract the actual discount from the original amount 'x' and equate this to given sale price. Solve the equation and find the original amount 'x'.

Step-by-step explanation:

Sale Price = $11.34 (answer). This means the cost of the item to you is $11.34. You will pay $11.34 for a item with original price of $12.60 when discounted 10%. In this example, if you buy an item at $12.60 with 10% discount, you will pay 12.60 - 1.26 = 11.34 dollars.

The markup from cost to sale price is 81 dollars.

What is the cost price?

Cost price, for instance, equals selling price plus profit ( when selling price and profit is given )

Cost is equal to Selling price plus Loss ( when selling price and loss is given )

The Cost price = 100 Selling Price + 100 + Profit

where the Selling Price and Profit Percentage are supplied.

The selling price of item = $390

cost = $270

10% × $390 = $39

Now subtract 39 from 390

390 - 39

351

Now subtract 270 from 351

351- 270

81

$81 is markup price .

Learn more about cost price;

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Inverse Functions Question:
Find the inverse for f(x)= 6x+15

Answers

Answer:

attached pic

Step-by-step explanation:

Answer: Finding the Inverse of a Function

First, replace f(x) with y . ...

Replace every x with a y and replace every y with an x .

Solve the equation from Step 2 for y . ...

Replace y with f−1(x) f − 1 ( x ) . ...

Verify your work by checking that (f∘f−1)(x)=x ( f ∘ f − 1 ) ( x ) = x and (f−1∘f)(x)=x ( f − 1 ∘ f ) ( x ) = x are both true.

Step-by-step explanation:

Decide if each function below can be represented by y = 3x – 2. Select Yes or No for each function

Answers

Only the first one and third one can be represented by that equation.

The distance between two rivers on a city map is 8.5 centimeters. The scale on the map states that 3 centimeters represents 6 kilometers. What is the actual distance between the two rivers?
A) 2.1 kilometers
B) 4.25 kilometers
C) 17 kilometers
D) 18 kilometers

Answers

your answer is 17 kilometers :)

The actual distance between the two rivers is 17 Km.

What is the Distance?

Distance is a numerical or occasionally qualitative measurement of how far apart objects or points are.

Given that, the distance between two rivers on a city map is 8.5 cm. The scale on the map states that 3 cm represents 6 km.

Scale factor = 3/6 = 1/2

8.5*2 = 17

Hence, The actual distance between the two rivers is 17 Km

For more references on Distance, click;

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Ben has a music book with 84 songs. He has learned how to play 25% of them. How many songs in the book does Ben NOT know how to play

Answers

Answer:

63

Step-by-step explanation:

This is because 25% of 84 is 21. He knows how to play 21 songs. 84-21=63.

63 is how many songs he does NOT know how to play.

Answer:

The answer is 63.

----------------------------------

24% of 84 is 21. 84 - 21 = 63.

PLS HELP ME...
Give five ordered pairs on the graph of y = -0.5x.

Answers

Answer:

(0,0) (-2,1) (-4,2) (-6,3) (-8,4)

Step-by-step explanation:

Hope this helps!

A recipe calls for 1/2 lb of flour for 1 batch. How many batches can be made with 1lb of flour?

Answers

Answer:

2 batches

Step-by-step explanation:

1/2 bag of flour makes 1 batch.

there are 2 halves in 1 bag.

2 halves = 2 batches.

2 batches can be made because if 1/2lb = 1 batch, twice as much pounds will be twice as much batches. 1/2 lb= 1 1lb= 2 batches

Which expression has the same value as the one below?22+(-32)
22+(-22)+(-10)
22+(22)+(-10)
22+(-22)+(10)
22+0+32

Answers

Answer:

its 22+(-22)+(-10)

Step-by-step explanation:

Answer:

22 + ( - 22 ) + ( - 10 )

Step-by-step explanation:

Hope i helped!

100) slope and y-intercept , answer ASAP ( I will give extra points)

Answers

Answer:

now this one i don't understand. i got the last one but not this one.

Step-by-step explanation:

Your Starbucks gift card has $40 on it. You spend $5 on your latte every day.

a) Write an equation to represent to situation.

b) What is the slope?

c) What is the y-intercept?

d) What does the slope represent?

e) What does the y-intercept represent?

Answers

Answer:

d           what does the slope represent

Step-by-step explanation:

a) 5x=40
b) $40
c) $5
d) the slope represents how much money the gift card has
e) the y-int. represents the rate change

arrange in order from smallest to largest:
0, 1, 1/2, 5/8, 9/10, 2/5

Answers

Answer:

can't you just look it up?

Step-by-step explanation:

Answer:

0, 2/5, 1/2, 5/8, 9/10, 1

Step-by-step explanation:

1/2= 0.5

5/8 = 0.625

9/10 = 0.9

2/5 = 0.4

so it will be

0, 2/5, 1/2, 5/8, 9/10, 1

Cassie wants to buy a pair of shoes for $26.50 and a shirt for $9.50. If the sales tax rate is 8.25%, what will be the amount of sales tax on Cassie’s purchase?
$3.13
$2.97
$3.06
$2.89

Answers

The amount of sales tax is $2.97.

The tax for the shoes: 26.50*0.0825=2.18625

The tax for the shirt: 9.5*0.0825=0.78375

2.18625+0.78375=2.97

pls mark brainliest:))

Answer:

B. 2.97

Step-by-step explanation:

First, add 26.5 plus 9.5 to get the total of the purchase without tax. Then, create a proportion (8.25/100= x/36). multiply 8.25 by 36, and divide the product by 100 to get 2.97. Hope this helps!

Which is true about the solution to the system of inequalities shown? y > 3x + 1 y 3x + 1 are solutions. Only values that satisfy y 3x + 1 or y < 3x – 3 are solutions. There are no solutions.

Answers

Answer:

there are you just got to find them

Its A because 3x+1y and the other ones wouldn’t be

-6(-n+4)=18

this is for my friend lol i’m helping him w his assignment

Answers

Answer:

-6(-n+4)=18

6n-24=18

6n-24+24=18+24

6n=42

n=7

Step-by-step explanation:

brainliest for correct answer with work

Answers

Slope is 1/2
You take rise over run
So it goes up like 1 and over 2
Actually since it’s like in the negatives n stuff it’ll probs be like -1/2

charlie gas a giant bag of gumballs . He gives half of what he has to his buddy jayden . He gives half of what's left to marinda . Then he gives half of what's left now to Zack . His mom makes him give 5 gumballs left . How many gumballs did charlie begin with ?

Answers

Answer:

8

Step-by-step explanation:

Answer40/2=20 20/2=10 10-5 = 5

Step-by-step explanation:

For the function y = 4x – 2, what is the value of the function when x is equal to -3?
14
-14
-10
10

Answers

Answer:

-14

Step-by-step explanation:im in 8thgrade plus this  4x  4 -3   -12 -2=-14 bam easy

plus

-14 I believe tell me if it’s wrong

A triangle has one side that measures x, and the other two sides each measure 4 inches less than x. The perimeter is 19 inches.

What is the measure of x?

5
3
9
2

Answers

Answer:

x=9

Step-by-step explanation:

x + x - 4 + x - 4 = 19

3x - 8 = 19

3x = 19 + 8

3x = 27

x = 9

Answer: x=9

Step-by-step explanation:

There are three sides 2 that are x-4 and 1 that is x. The equation would be

x+2(x-4)= 19 so you would simplify to get

X+2x-8=19 then 3x=27 then divide by three to get x=9

help please help................

Answers

Answer:

8*150=1200 I think it is

8•150=1200 i think ❤️

In Mr. Dalle’s class, 13 students wear glasses and 9 do not. What is the ratio of students who do not wear glasses to the number of students who wear glasses?
A.9 to 13
B.9 to 22
C.13 to 9
D.13 to 22

Answers

Answer:

a

Step-by-step explanation:

because students have good eyesight while others dont.

Answer:

AAAAAAAAA  

Step-by-step explanation:

TRUST ME AND STAY SAFE


Let x represent the number of adults entering the movie theater and let y represent the cost,in dollars,of admission to the movie theater.Write an equation to illustrate the relationship between the number of adults entering the theater and the cost in dollars for admission

Answers

Answer:

yes.

Step-by-step explanation:

Y=9x
Y= total cost
X= number of adults

9 is the constant

Hope this helped! If any questions, feel free to ask! :)

Pls help it can be a . Number I will mark brainliest to whoever explains how to do it

Answers

you have to get X alone, suntract 3 from the first one so 7x =-3 then decide by 7
I’ll answer just so the person above me can get his/her brainliest

Which of the following is the graph of y ≤-1/2x-3

Answers

Answer:

i would say the first one

Step-by-step explanation:

c - 7 = 12 :((((((((((((((((((((((((((((((((((((((((((((((((((((((

Answers

C-7=12
C=12+7
Then C= 19

Help Please & Thanks

Answers

I am not sure but I think it’s c

DUE TODAY thank you!

Answers

Answer:

five states up from the bottom

Step-by-step explanation:

tilt the map

Answer:  

It's the bottom it goes Florida and then another state and the on stop of that state is north Carolina

Step-by-step explanation:

3x - 5y = -35
please solve and show your work

Answers

You use the formula y=mx+b, therefore you have to isolate the y
First you subtract 3x to both sides.
3x - 5y = -35
-3x -3x
Then it would be
-5y = -3x -35
Then you divide -5 on both sides to isolate the y
-5y = -3x -35
/-5 /-5 /-5
Two negatives cancel out and make a positive so it would be
Y = 3/5x + 7
(:

HELP HELP HELP HELP HELP HELP HELP HELP HELP HELP DUE SOON

Answers

Answer:

ez

Step-by-step explanation:

For a all you have to do is multiply by 3 so the answer would be -15

For b all you have to do is subtract 12 then divide by -1 so the answer would be -0.5

for c all you have to do is divide by -10 so the answer would be -0.1/-10 or 0.1/10

What is the equation of this line?

y=2/3x

y=−3/2x
y=−2/3x
y=3/2x

Answers

Answer:

D. y=(3)/(2)x

Step-by-step explanation:

Y=3/3x, that is the answer.
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