Mathematics Middle School

A pan balance has 3 cubes on one pan and 11 cubes on the other pan. Lucy thinks she should add 7, 8, 9, or 10 cubes to make the pans balance. How can you use the equation 3 + c = 11 to find the number of cubes Lucy should add?

Answers

Answer 1

Answer:

Step-by-step explanation:

11-3=c

c=8

Answer 2

The number of cubes Lucy should add is 8.

What is an equation?

In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.

Given that, a pan balance has 3 cubes on one pan and 11 cubes on the other pan.

The equation to represent the situation is 3+c=11

The solution of an equation is the set of all values that, when substituted for unknowns, make an equation true.

Now, c=11-3

c=8

Therefore, the number of cubes Lucy should add is 8.

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Related Questions

Which expression is equivalent to 3d - d + 4 + d

A. 4d + 4
B. 4d - 4
C. 3d - 4
D. 3d + 4

Answers

Answer:

Step-by-step explanation:

D

Explanation: 3d - d + 4 + d
Collect like terms
3d - d + d + 4
- d + d = 0
Answer = 3d + 4

Will award brainliest

Answers

Infinite solution Bc both sides are equal

Hello, I would really like some help on this!! Please leave an explanation of how you got your answer! Thank You!

Answers

1a) To find the total area, you must find the area of the triangular part that is missing, then subtract this from the area of the rectangle. For the triangle’s area, you need to know the width (2m) and length (2m). For the rectangle’s area you need to know the width (3m) and length (4m).
1b) the total area is 10m^2 (10 meters squared). This is found by subtracting the triangle (.5x2x2=2) from the rectangle (3x4=12).

I don’t know how to answer this question sorry. I’m just answering so the other person can get brainliest.

An equation is shown. What is the value of 12x that makes the equation true?

12x + 4x = 15/2 + 4x

pls halp

Answers

Answer:

x = 5/8

Step-by-step explanation:

I NEED biggggggg brain helpers XD

Answers

Answer:-18x^5y^{6z+2}

Step-by-step explanation:

dont feel like explaining

Can someone plzzz help Ik I’m need!!!

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270 because 120/24 = 5 5x54 = 270

I agree with the first person

Δ MNO ~ Δ PQR

What is the length of x?

1 4/5

1 7/9

1 3/5

2 1/2

IF U STEAL POINTS U GET REPORTED

Answers

The value of x in the given triangle is [tex]1\frac{3}{5}[/tex]

What are the similar triangles?

Similar triangles have the same corresponding angle measures and proportional side lengths.

Given that, two triangles are similar, Δ MNO ~ Δ PQR,

According to definition of similar triangles,

PR/MO = QP/NM

x/4 = 2/5

x = 8/5

x = [tex]1\frac{3}{5}[/tex]

Hence, the value of x in the given triangle is [tex]1\frac{3}{5}[/tex]

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pls help me with thissssss

Answers

divide the two numerators and get 3.25 multiply 13 hours by that and the answer to the first part is 42.25

yes that’s very true

Can you hep me with this question...

Answers

Answer:

so like I just looked it up so try

-4

----

-4

Answer:

10/27

Step-by-step explanation:

To figure this out, first subtract 8/15 from 6/5.

Before we can do that though, we need a common denominator. The LCM of 5 and 15 is 15. (5 * 3 = 15; 15 * 1 = 15) 8/15 already has 15 has a denominator, so that doesn't need to be modified. 6/5 becomes 18/15 (6 * 3 = 18).

Subtract 8/15 from 18/15 to get 10/15. This simplifies to 2/3.

Now, multiply 2/3 by 5/9 (reciprocal of 9/5). That equals 10/27. There is no need to reduce, as it is already simplified.

PLEASE HELP!! I'LL GIVE BRAINLEST!!

Use the formula P = 2l + 2w. Find the perimeter of a rectangle with a length of 12.9 ft and a width of 19.3 ft. Show all of your work.

Answers

p = 2(12.9) + 2(19.3)
P = 25.8 + 38.6
P = 64.4

Which expression is equivalent to 4s + 3 - 3 - s

A. 3s + 6
B. 4s + 0
C. 3s
D. 3s + 1

Answers

Answer:

C. 3s

Step-by-step explanation:

After a power failure, the temperature in a freezer Increased at an average rate of 3.5 °F per hour. The total Increase was 24.5 °F. Enter and solve an equation to find the number of hours until the power was restored. Let x represent the number of hours it takes for the temperature to increase to 24.5 °F.

The equation to find the number of hours until the power was restored is ____x = _____

The number of hours until the power was restored is ______ hours.

<Please fill in the blanks I will give you brainliest if you answer correctly>

Answers

Answer:

3.5x=24.5

3.5x7=24.5

X=7

Step-by-step explanation:

3.5 times what equals 24.5

3.5x1=3.5

3.5x2=7

3.5x3=10.5

Keep doing this and increase the number you are multiplying 3.5 by until your answer is 24.5.

What is the area of `∆STR`?

A.
30 square feet
B.
34.5 square feet
C.
57.5 square feet
D.
60 square feet

Here another one T^T

Answers

i believe the answer is A i

It’s A I took the test

pls someone plsss help meeeee

Answers

Answer:

student a answered correctly

Step-by-step explanation:

student b didn't multiply the crossproducts

Answer:

Student B has the correct answer

Between the two proportions you are looking for number which are related in the same way.

When dividing 45 by 15 you get 3, you should also get 3 when dividing the proportion next to it.

To Solve-

Cross multiply 6 x 15 =90

Then divide by 45

The correct answer is 2

46+ 2/7w
w= -1/2
You don't need to show your work

Answers

46.1428 or -46(3/14)

what is 3(x + 3) equal to

Answers

3x + 9 if you don’t know what x equals.

Answer:

3x+9

Step-by-step explanation:

HELP I will give Brainliest If Correct!! (Please Explain)

Answers

You need to write this is scientific form.

In this case it’s: 0.4 * 10^11

3.8 × 10^10 you have to round the number

(repost) Help Please!! I will give Brainliest!!

Answers

3x10^10 cubic feet if you need the work let me know

3x10^10 is the correct answer

The spinner is spun 48 times. What is a reasonable prediction of landing on the letter E?

Answers

Answer:

because that is the right amount of times you spun it

Step-by-step explanation:

Is true artificial intelligence possible? Write a short essay and explain your opinion.

Answers

KSKSKSKSKSKSKSKSSKSKSK

The spinner is spun 240 times. What is a reasonable prediction
of it landing on a number less than 3?

Answers

Answer:

60 times

Step-by-step explanation:

2/8 pieces of the circle are less than three

2/8 = 25% chance of landing less than 3

240 * 25% = 60

Jada's brother drives 18 miles to work and then a quarter of that distance again. How far does Jada's brother drive?

Answers

18+4.5

A quarter of eighteen is 4.5

if giselle had five books sets and gave 9 books away and has 26 left how many were in the bookset

Answers

Answer:

7 in each book set

Step-by-step explanation:

26+9= 35 (total # of books)

35/5= 7 ( # of books in a book set)

26 + 9 = 35
35 / 5 = 7
So the answer is 7 books per book set!
Hope it helps

round 0.615 to the nearest Hundreth pLEASEEEE HSLPPPP

Answers

Answer:

0.62 is the answer

Step-by-step explanation:

Answer:

0.62

Hope this helped have a great day

2 2/5 multiplied by 2 multiplied by 3 1/5

Answers

Answer:

15 9/25

Step-by-step explanation:

1 Convert 2\frac{2}{5}2

to improper fraction. Use this rule: a \frac{b}{c}=\frac{ac+b}{c}a

ac+b

\frac{2\times 5+2}{5}\times 2\times 3\frac{1}{5}

2×5+2

×2×3

2 Simplify 2\times 52×5 to 1010.

\frac{10+2}{5}\times 2\times 3\frac{1}{5}

10+2

×2×3

3 Simplify 10+210+2 to 1212.

\frac{12}{5}\times 2\times 3\frac{1}{5}

×2×3

4 Convert 3\frac{1}{5}3

to improper fraction. Use this rule: a \frac{b}{c}=\frac{ac+b}{c}a

ac+b

\frac{12}{5}\times 2\times \frac{3\times 5+1}{5}

×2×

3×5+1

5 Simplify 3\times 53×5 to 1515.

\frac{12}{5}\times 2\times \frac{15+1}{5}

×2×

15+1

6 Simplify 15+115+1 to 1616.

\frac{12}{5}\times 2\times \frac{16}{5}

×2×

7 Use this rule: \frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}

\frac{12\times 2\times 16}{5\times 5}

5×5

12×2×16

8 Simplify 12\times 212×2 to 2424.

\frac{24\times 16}{5\times 5}

5×5

24×16

9 Simplify 24\times 1624×16 to 384384.

\frac{384}{5\times 5}

5×5

384

10 Simplify 5\times 55×5 to 2525.

\frac{384}{25}

384

11 Convert to mixed fraction.

15\frac{9}{25}

15 9/25

2 2/5 times 2 times 3 1/5= 24/25

on the left side of the triangle, it says 10 cm, on the right side of the triangle, it says 18 cm, below the triangle, it says 15 cm. find the area of the triangle and answer this question is square cm.

Answers

Area formula for a triangle is 1/2BxH

B=15
H=10

1/2(15)= 7.5

7.5 x 10= 75

So the area is 75 square cm :)

HELP 2 questions answer both

Answers

Answer:

n=4x(-12.4)

n=-4x12.4

n=-49.6

Multiply both sides of the equation by

Step-by-step explanation:

Answer:

n=-49.6.Multiple by -12.4

can someone help me out :P

Answers

-5.2<.-4.75<-9/2.....

Find the sales tax....

Answers

Answer:8.75

Step-by-step explanation:

Use substitution to find the ordered pair of the following system of equations:

y=6x
y=5x+7
(_,_)

Answers

Answer:

first substitute 'y' in 2nd equation by right side of 1st one and you get:

now substract 5x from both sides of 2nd equal and you get:

as a result of the equal above you get:

now substitute x in very first equation by the result from above (x=7):

Step-by-step explanation:

sorry if its wrong

6x = 5x + 7
-5x -5x
——————
x = 7
y = 6x
y = 6(7) = 42

Your answer: (7, 42)

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