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den301095 [7]
3 years ago
9

The cube of the difference of a number and 4

Mathematics
1 answer:
lbvjy [14]3 years ago
6 0

Answer:

(x - 4)³

Step-by-step explanation:

"The cube of x" would be x³.  The difference of a number and 4 would be x - 4.

Therefore, "the cube of the difference of a number and 4" would be

(x - 4)³

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214 people used a public swimming pool. $1.50 for kids and $2.25 for adults. The receipt totaled to $390 How many children and h
zysi [14]

Answer:the number of kids that used the public pool that day is 122

the number of adults that used the public pool that day is 92

Step-by-step explanation:

Let x represent the number of kids that used the public pool that day.

Let y represent the number of adults that used the public pool that day.

214 people used a public swimming pool. This means that

x + y = 214

1.50 for kids and $2.25 for adults. The receipt totaled to $390. This means that

1.5x + 2.25y = 390 - - - - - - - - - -1

Substituting x = 214 - y into equation 1, it becomes

1.5x

1.5(214 - y) + 2.25y = 390

321 - 1.5y + 2.25y = 390

- 1.5y + 2.25y = 390 - 321

0.75y = 69

y = 69/0.75 = 92

Substituting y = 92 into x = 214 - y, it becomes

x = 214 - 92 = 122

5 0
3 years ago
A girl scout troop sold cookies. If the girls sold 5 more boxes the second week than they did the first, and if they doubled the
nika2105 [10]
So,

We have three placeholders.

x, y, and z will represent the number of cookie boxes they sold for the first, second, and third weeks, respectively.

"The girls sold 5 more boxes the second week than they did the first."
x + 5 = y

"They doubled the sales of the second week for the third week."
z = 2y

"To sell a total of 431 boxes of cookies"
x + y + z = 431

Now we have our three equations.
x + 5 = y
z = 2y
x + y + z = 431

Obviously, we can substitute y and z in the last equation, because the other two open sentences tell us what they are.
x + (x + 5) + 2(x + 5) = 431
x + x + 5 + 2(x + 5) = 431

Collect Like Terms.
2x + 5 + 2(x + 5) = 431

Distribute.
2x + 5 + 2x + 10 = 431

Collect Like Terms.
4x + 15 = 431

Subtract 15 from both sides.
4x = 416

Divide both sides by 4.
x = 104

Now we can use the other two original sentences to figure out what y and z are.
x + 5 = y
104 + 5 = y
109 = y

z = 2y
z = 2(109)
z = 218

Now, to check, add x, y, and z.
x + y + z = 431
104 + 109 + 218 = 431
213 + 218 = 431
431 = 431 This checks.

The Girl Scouts sold 104 cookie boxes on the first week, 109 boxes on the second week, and 218 boxes on the third week.
3 0
3 years ago
Read 2 more answers
Esmeralda bought " p" pounds of peanuts at $3 per pound and " a" pounds of almonds at $6 per pound . write an algebraic expressi
Andru [333]
 answer would be 3p+6a
8 0
3 years ago
Gwendolyn is asked to solve the equation –4(x – 3) = 20. She shows the work below and states that the solution is x = –8. –4(x –
____ [38]

Answer:

x=-2

Step-by-step explanation:

Given: Equation is -4(x-3)=20

To find: flaw in Gwendolyn's work and the correct solution to the equation.

Solution:

In the given question,

the first step is -4(x-3)=20

The second step is -4x+12=20

(This step is obtained on multiplying -4 by x-3)

The third step is -4x=32

This step is wrong as on transposing 12 from left side of the equation in the second step to the right side, the following equation is obtained:

-4x=20-12\\-4x=8\\x=-2

So, the correct solution is x=-2

3 0
3 years ago
Read 2 more answers
Solve for x. x-0.3x=28
Svetlanka [38]

Answer: x=40

Step-by-step explanation x-0.3x=28

Add similar elements x-0.3x=0.7x

0.7x=28

Multiply both sides by 10

0.7x · 10= 28  · 10

Refine

7x=280

Divide both sides by 7

Simplify

x = 40

5 0
3 years ago
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