Mathematics Middle School

Elena has 80 trading cards in her collection. If 15%
of her cards are baseball cards, how many of Elena’s trading cards are baseball cards?

Answers

Answer 1

Answer:

12

Step-by-step explanation:

the answer is 12

Answer 2
the answer is 12


80x0.15=12
therefore 12 of the cards are baseball cards

Related Questions

Determine whether the representation is proportional.y= -9x

Answers

Answer:

Yes it is

Step-by-step explanation:

y=-9x means that for every x value, the y value decreases by 9, so it is proportional because the value of y decreases the same amount each time. For example, if x=1, y=-9. If x=5, y=-45, and so on.

Yes it is proportional

Can someone help me ASAP! Ill give you brainliest!
Im horrible in this skill, and it has to be correct :-)
Plz and thank you!

Answers

i think the answer for this is 265 :)

Please help me with this

Answers

7. 12 * 6 = 72

8. 8.50 * 4 = 34

9. 365*3 = 1095

10. 6*11  = 66

11. 5*5 = 25

12. 70*8 = 560

Answer:

7)  72 inches in six feet

8)  $34.00 for 4 shirts

9)  1095 days in 3 years

10) 66 cans in 11 boxes

11) 25 students in 5 groups

12) 560 pages in 8 notebooks

Explanation:

7)  12* 6= 72

8)  8.50* 4 = 34

9)  365 * 3 = 1095

10)  6 * 11= 66

11) 5 * 5= 25

12) 70 * 8= 560


pls help 20 points

Adult tickets for a movie cost $8 and children's tickets cost $6. If two adults and
three children go to the movies, how much will they pay?

Answers

8x2=16
6x3=18
16+18= 34

answer: 34$

Answer: 34

Step-by-step explanation: 8 times 2 is 16 and 6 times 3 is 18. You add 16+18 and the answer is 34

The value of a share of stock decreases in value at a rate of $1.40 per hour during the first 3.5 hours of trading. Enter and solve an equation to find the decrease in the value of the share of stock during that time. Let x represent the decrease in value of the share of stock during 3.5 hours.


The equation to find the decrease in the value of the share of stock is x / _____ = _______


The decrease in value of the share of stock during 3.5 hours was $________​

Answers

Answer:

x/3.5h = -$1.4

So, x = -$1.4 * 3.5h

= -$4.9

Step-by-step explanation:

Since your losing $1.4 every hour, the 1.4 is supposed to negative.

Also, since your losing that amount of money for 3.5 hours, we are trying to find the total of how much money is lost in the 3.5 hours. To do this, we have to do x/3.5h = -$1.4. But since you can't do x/3.5, we have to do inverse operation. When you divide 3.5 hours to the other side of the equation it becomes multiplication. So you do -$1.4 times 3.5 hours

and get  -$4.9.

PLZZ HELLLLLPPPPievjp

Answers

She can ride a bike 7 miles per hour

How many minutes are from 5:32 Pm to 6:19 Pm?? PLEASEEEE HELP!!!! THIS IS URGENT PLEASEE HELP

Answers

There are 28 minutes from 5:32 to 6:00 and 19 minutes from 6:00 to 6:19. Thus, there are 47 minutes from 5:32 pm to 6:19 pm.

6&7 thanks for your help

Answers

great! I think that would work perfectly!

Answer:

Length = 11 1/3 ft; Width = 4 2/3 ft

Step-by-step explanation:

First question:

The length is 2 more than twice the width, so

L = 2W + 2

Second question:

2L + 2W = 32

L = 2W + 2

Since the second equation is already solved for L, we can use the substitution method. Replace L of the first equation with 2W + 2, and solve for W.

2L + 2W = 32

2(2W + 2) + 2W = 32

4W + 4 + 2W = 32

6W = 28

W = 28/6 = 14/3 = 4 2/3

L = 2W + 2 = 2(14/3) + 2 = 28/3 + 6/3 = 34/3 = 11 1/3

L = 11 1/3

W = 4 2/3

Answer: Length = 11 1/3 ft; Width = 4 2/3 ft

What is the equation of this line in standard form?


A. 6x−7y=17


B.11x−6y=13


C.6x−11y=13


D.6x−11y=−13

Answers

Answer:

A. 6x- 7y= 17

Step-by-step explanation:

It is A. 6x- 7y=17









Hope this helps

4,902 × 0.001 is the same as 4,902 ÷ 10 to the power of 3
True or False?

Answers

Answer:

False

Step-by-step explanation:

4902x0.001 = 4.902

4902/10 = 490.2

490.2^3 does not equal  4.902

An irregular polygon is shown below:




The area of the irregular polygon is ____ square units.

Answers

The answer is 26 square units

Answer:

26 Units Squared

Step-by-step explanation:

We can split the polygon into different sections the first section 4 units * 4 units = 16 units squared then by analyzing the other section we can find it is 5 units by 2 units = 10 units added together is 26 Units Squared

Which statement compares the two numbers correctly?

0.799 ________ 0.8

0.799 > 0.8
0.799 = 0.8
0.799 < 0.8
0.8 < 0.799

Answers

Answer:   0.8 <0.799

Step-by-step explanation:

Just did the same quiz

one stone on easter island is 12 meters high. the nose of the statue is 3.3 meters long. If the proportional statue is only 10 meters high. How long will the nose be? write your answer in a decimal

Answers

Answer:

The nose will 2.75 meters long.

Step-by-step explanation:

Answer: 2.5 meters long

Which property was used to simplify the expression?

distributive property
commutative property
associative property
inverse property

Answers

Inverse Property, I am pretty sure. Not sure though.
i do believe it’s Inverse property, sorry if that’s incorrect

A line passes through the point (2,-6) and has an initial value of 6. What is the rate of change for this line?
A. -12
B. -6
C. -1/6
D. 6

Answers

-6
Just did the question

-6

We assume "initial value" means the y-intercept is (0, 6). The rate of change is the "rise" divided by the "run" between the two points.

rise = -6 -6 = -12 . . . . difference of y-values

run = 2 -0 = 2 . . . . . . difference of corresponding x-values

rate of change = rise/run = -12/2 = -6

The rate of change of this line is -6.

Hi! Hope You're Having A More Than Amazing Day!
Please Help!

For Jimena to be accepted into her favorite college, she will have to earn an entrance exam score at least 2 standard deviations above the mean. Assume entrance exam scores are normally distributed, with a mean of 790 and a standard deviation of 50. What exam score does Jimena need to be accepted at her favorite college?

690
890
740
840

Answers

890 is the answer hope I got it

Footlocker buys sneakers for $60 each and marks up the price by 30% so they can make a profit. What is the selling price of the sneakers at Footlocker

Answers

Answer:

now it would be $78

A group of students is timed while sprinting 100 meters. Each student’s speed can be found by dividing 100 m by their time. Is each statement true or false?

Select the correct choice for each statement then explain your reasoning.

1. Speed is a function of time.
2. Time is a function of distance.
3. Speed is a function of number of students racing.
4. Time is a function of speed.

Answers

Answer:

The true statements are (a) and (d)

Step-by-step explanation:

(a). Speed is a function of time : As seen from equation (1) Speed of the students varies according to the value of time. So, This a true statement.

(b). Time is a function of distance : Distance is not varying in the equation (1), it is fixed to be 100. So, time is not a function of distance because here the distance is made constant. So, This is false statement.

(c). Speed is a function of number of students racing : Speed is not depending on the number of students racing so sped is independent of the number of the students racing. Therefore, Speed is not a function of number of students racing. This is False statement.

(d). Time is a function of speed : As seen from equation (1) Time of the students varies according to the value of their speed. So, This a true statement.

The true statements are (a) and (d).

The true statement are (a) and (b)

Please help. . . . . .

Answers

16...........................,.,
The answer is 20

Steps
2x^2 - y X=3 Y= -2
2(3)^2 - (-2) 3 * 3 = 9
2(9) + 2
18 + 2
= 20

Please help! thank you so much! :)

Answers

It’s either A or B
6^2= 36
8^2= 64
36+64=100

Answer:

c is correct

Step-by-step explanation:

help me solve this pls i make u a brainliest if it correct

Answers

Answer:

10 5/6

Step-by-step explanation:

There you go, hope this helped you

What equation has infinite many solutions?
1. 3(n+7)-6=2n+10+n
2. 3n-3=5(n+2)-2n
3. 2n+3(n-4)+5=5n-7
4. 2n-4=2n-2(n+2)

thank you :))

Answers

3 because
2n+3(n-4)+5=5n-7
2n+3n-12+5=5n-7
5n-7=5n-7
5n-5n=7-7
0

Find the percent of the number.

50% of 70 is
.

Question 2
Explain your method.

Answers

Answer:

35

Step-by-step explanation:

Using proportions, you are correct:

70/x = 100/50

cross multiply

100x = 3500

divide both sides by 100 to get your answer.

35 because 70\2= 35.

Use the distributive property to expand 0.05(50 + 40).

Answers

Answer:

4.5

Step-by-step explanation:

0.05(50+40) = 0.05 x 50 + 0.05 x 40 = 2.5 + 2 = 4.5

i hope this helped, and if it did, please mark this as brainliest! thanks

Your answer is 4.5

Explanation-

.05•50= 2.5

.05•40= 2

Add them together and get 4.5

can some one help me i have no idea what this is

Answers

Answer:

b=-25

Step-by-step explanation:

10= -2/5b

10=      -2/5b

------    -------

-2/5       -2/5b

b=-25

Check:

-2/5(-25)=10

10=10

Answer:

b=-25

Step-by-step explanation:

plz help!!! if both are answered= brainly

Answers

Answer:

The Slope of the table = 2

the slope is 2! sorry if i’m wrong.

the table shows the probability for rain on different days what is the probability of rain on Monday and no rain on Tuesday.
Day /probability of rain
Monday/20%
Tuesday/30%
Wednesday/40%
Answers are
A 0.06
B 0.14
C 0.5
D 0.9

Answers

Answer:

A im pretty sure

Step-by-step explanation:

if it's not im sorry

the correct answer is A

I will award brainliest here

Answers

Answer:

2ND ONE

Step-by-step explanation:

I think it’s the 2nd one

Please answer if you know the answer.
Find x and give reasons.

Answers

the answer is 30 have a good day

Help me will give brainliest

Answers

Answer:

The first option is correct, 12/30 and 25/30

Step-by-step explanation:

To get common denominators, you need to find the GFC (greatest common factor) of 5 and 6, which is 30. Then you would need to make the fractions equal the same as the original fractions, by multiplying.

2/5 = ?/30 <- you can see that 30 is 6 times more than 5. so this means you multiply 2 by 6 to get 12. 12/30

5/6 = ?/30 <- you can see that 30 is 5 times more than 6. so this means you multiply 5 by 5 to get 25. 25/30

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