Mathematics High School

A pile of cards contains red and blue
cards. The ratio of blue cards to red
cards is 5:7, and there are 15 blue
cards in the pile. What is the total
number of cards in the pile?

Answers

Answer 1

Answer:

There are 36 cards

Step-by-step explanation:

let blue be B and red be R

B:R =5:7

B/R = 5/7

there are 15 blue cards...

15/R = 5/7

make R subject of the formula...

R = (15×7)/5

R = 21

there are 21 red cards and 15 blue cards

Total number of cards = red cards + blue cards

= 21 + 15

= 36 cards

Related Questions

Which statement is true about the pattern above?

Answers

The answer is the fraction 12/16 is also part of the pattern

Answer:

The correct answer is "The next fraction in the pattern is 243/324". Each fraction is the other multipled by 3.

Step-by-step explanation:

Who are some good you tubers to watch?

Answers

Answer:

Cocomelon

Their videos are pretty good!

Which equation represents a nonlinear relation?
A y=6x

B y-x=x^2

C x-5=y-7

D y=2x/x-5

Answers

Okay it might not be right but I say B

PLEASE HELP ME!!!
How many blue pens were there to start with?

Answers

Answer:

180 blue   70 red

Step-by-step explanation:

b= blue      r = red

b+r = 250

r = (250-b)

If 40% is removed the rest is 60%

If the 70% is removed the rest is 30%

0.6b + 0.3(250-b)  = 129

0.6b + 75 - 0.3b = 129

  0.3b = 54

divide by 0.3

  b = 180

    250-180 =  70

   60% 0f 180 = 108

   30% of 70 = 21

   108 +21 = 129

   

(NOOOOOOOOOOOOOO LIIIIIIIIIIIIIIINKS!!!!!!!!!)
Fill in the missing digits: _37_ minus 2465 = 59_7
I REPEAT, NO LINKS!

Answers

Answer:
8372-2465=5907

helppp please!!! with the equation, i have no clue

Answers

Answer:

look at the picture i have sent

Please help explain to me!

Answers

We are dealing with numbers 10^6 and 10^14. With this format, the number in the top right is basically how many zeros the numbers has. So 10^14 / 10^6 equals 10^8, which is 10,000,000!

Please help :') Estimate 15 divided by 2.57

Answers

Answer:

5.83

Step-by-step explanation:

15 ÷ 2.57 = 5.8

mark as brainllest

the answer is 5.83

hope it's help

Help please !!!!!!!!!!!!!!!!!!!!

Answers

Answer:

i would say its C but im not 100% sure

Step-by-step explanation:

© In a class full of men and women,4/9 of the class are women.
What is the ratio of men to women in its simplest form?

Answers

Answer:

4:9

Step-by-step explanation:

√2/3 -√1/6 how do you do this

Answers

Hopes this helps

I used this app called Cymath.

Answer:

Answer:

1/√6 or √6 /6

Step-by-step explanation:

√2/3 -√1/6 =√4/6 - √1/6

= (√4-√1)/√6

= (2-1)/√6

=1/√6 or √6 /6

the population of a city is 10,000 people. A researcher wants to estimate how many people own a car and how many don't. The researcher surveys a random sample of 240 and records and these results. 180 people do own a car and 60 people don't. estimate the number of people that do own a car and don't, round to the nearest 500

Answers

Answer:

7380 people have cars and 2460 people dont so rounded to the nearest 500 i would say it is 1000

Step-by-step explanation:

tell me if im right please

combine like terms to write an equivalent expression for

2( 4y^2 + 6x - 2y^2 + 12x.)

Answers

8y^2 + 12x - 4y^2 + 24x
= 4y^2 + 36x

3) Six teams are playing in a baseball tournament. In how many ways can the teams be crowned champion and
runner-up?

Answers

Answer:

15ways

Step-by-step explanation:

This question bothers combination

Combination has to do with selection

Given

Total number of teams  = 6

champion and runner up = 2

number of ways is expressed as 6C2

6C2 = 6!/(6-2)!2!

6C2 = 6!/4!2!

6C2 = 6*5*4!/4!*2

6c2 = 30/2

6C2 = 15

Hence the number of ways they can be selected is 15ways

can someone please explain this and how to do these types of problems??!?! im so confused and i dont know how to do them right

Answers

Answer:

28/53

Step-by-step explanation:

We need the cos of Q

therefore we'll use CAH (in SOH, CAH, TOA)

where CAH means

cos(angle)=adj/hyp

the side that adjacent to Q is 28

and the hypotonous (the oppsoite to the right angle) is 53

therefore cos(q)=28/53

can somebody please help fast?

Answers

Answer: C

Explanation: one Y goes to one X.

Find the next 2 numbers in the sequence: 12,-1, -14, -27, -40.....

Answers

Answer:

12, -1, -14, -27, -40, -53, -66

Step-by-step explanation:

The pattern rule here is,

Start at 12, and minus 13 everytime.

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

Have a good day :)

Step-by-step explanation:

Given :

12 , -1 , -14 ....

And we need to find the next two terms of the sequence. Firstly let's find out the common difference.

[tex]:\implies[/tex] CD = -12-1 = -13

Next two terms :-

[tex]:\implies[/tex] Next terms = -53 , -66

Hence the next terms are -53 & -66 .

ALGUEM ME AJUDAA PFVRRR

RAP: O grito da periferia, pg. 62, 8° ANO

2- Explique o significado de algumas expressões, recorrendo a seus conhecimentos ou procurando entende-las no contexto.

|. "Tem mina que não se assimila"
||. "Isso não é maneiro"
|||. "quando o bicho pega corre"

b.) De que variedade linguistica essas expressões fazem parte?

3- Muitos raps parecem relatar situações realmente vividas. como se fossem ralatos autobiograficos. "Juntos e misturado" dá ao publico essa impressão? Explique sua resposta.

4- Esse rap revela uma ideologia em relação a forma como as pessoas devem se relacionar em sociedade. O que ele defende?


Ajuda ae TvT

Answers

Answer:

apprehending the speeches about the periphery , both with regard to the social space ... of the periphery and identified as black, enabled me to study them , or even, ... as the expressions of hip hop (break, rap and graffiti) and marginal literature, ... resides about 62km from the evening, Zé Batidão is a mandatory stop for the ...

Step-by-step explanation:

I really need help with this! Marking the best answer as brainliest!

Answers

Answer:

0, 3, -6, 7

Step-by-step explanation:

helpppp pleaseee
NO LINK

Answers

Answer:

The graph increases

Step-by-step explanation:

I NEED HELP 17 POINTS PLUS BRAINLIST PLEASE

Answers

Answer:

E

Step-by-step explanation:

Hope this helped!

The answer is E because I did it and got it right

PLZZZ I WILL MARK BRAINLIEST !!!!

Answers

Answer:

Your answer is b

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

ANSWER ASAP! MARK BRAINLIEST
3.) In triangle RST, RS = 4, ST = 5, and RT = 6. Which angle is largest?
Hint draw a picture!
A) B) C) D) Cannot be determined

Answers

Answer:

So If you start with sinØ = .5

your calculator is programmed to always give the closest angle to 0, and that would be 30°

You probably used the cosine law to find the first angle. A suggestion is to always find the largest angle first. If that happens to be an obtuse angle, your calculator will find the correct angle.

Of course there can only be one obtuse angle in a triangle, so using the sine law for your second angle does not result in any problems

notice that in your solution 78 and 102 add up to 180 , and sin 78 = sin(180-78) = sin 102

I would have found angle S first, the largest angle always opposite the largest side.

7^2 = 5^2 + 4^2 - 2(5)(4)cosØ

40cosØ = -8

cosØ = -8/40 = -1/5

Ø = 101.537°

Now you can use the sine law and you will find the correct other angles.

Step-by-step explanation:

In ΔUVW, the measure of ∠W=90°, VW = 32 feet, and WU = 78 feet. Find the measure of ∠V to the nearest degree.

Answers

Answer: [tex]67.68^{\circ}[/tex]

Step-by-step explanation:

Given

[tex]\angle W=90^{\circ}[/tex]

[tex]VW=32\ ft[/tex]

[tex]WU=78\ ft[/tex]

from the figure, we can write

[tex]\Rightarrow \tan v=\dfrac{UW}{VW}\\\\\Rightarrow \tan v=\dfrac{78}{32}\\\\\Rightarrow \tan v=2.437\\\Rightarrow v=\tan^-1(2.437)\\\Rightarrow v=67.68^{\circ}[/tex]

factorise this equation: 4x²-2x-5

Answers

Answer:

PEMDAS Answer:A

Step-by-step explanation:

parentheses exponents multiplication division addition and subtraction in order

Taylor collected 4 white shells and 9 grey shells. If she put all the shells in a bucket and randomly pulled one out, what is the probability that the shell would be white?

Answers

Answer:

4/13

Step-by-step explanation:

Add the number of eggs which is 13 so it shows that 13 eggs are in the bag and there are 4 white eggs so the probability of taking a white egg is 4/13

If m <1 = 115° and the m < 8 = 105°, what is the measure of angle 5?

Answers

Answer:

measure of angle 5 = 75 degrees

Step-by-step explanation:

given measure of angle 8 = 105 degrees,

angle 8 and angle 5 are in a linear pair so,

(the sum of angles in a linear pair is 180 degrees)

therefore, angle 8 + angle 5 = 180 degrees

therefore,. 105 + angle 5 = 180 degrees

angle 5 = 180 - 105

angle 5 = 75 degrees


What is the probability that Sarah will not select the queen of hearts?

Answers

Answer:

?

Step-by-step explanation:

Answer:

1/52

Step-by-step explanation:

There is only one queen of hearts in a deck of 52 so there for the prbability is 1/52.

how do you do this please

Answers

Answer:

X=4rad3

Y=4

Step-by-step explanation:

Evaluate the following expression when x=-5 and y=7: *enter numbers only

Answers

Answer

x+y

Step-by-step explanation:

Other Questions
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