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lana [24]
3 years ago
11

1)Simplify: 4d - 3e - 9d + 8e

Mathematics
1 answer:
Evgesh-ka [11]3 years ago
5 0
Combine like terms:

-5d+5e or 5e-5d

If you want, you can factor out the common 5:

5(e-d) is your answer
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Tony has saved dimes and quarters in his piggy bank he has saved a total of four dollars and has 25 coins how many dimes does he
k0ka [10]

Answer:

  • 15 dimes
  • 10 quarters

Step-by-step explanation:

Let q represent the number of quarters. Then Tony's coin value is ...

  0.25q +0.10(25 -q) = 4.00

  0.15q +2.50 = 4.00 . . . . . . . . eliminate parentheses, collect terms

  0.15q = 1.50 . . . . . . . . . . . . . . subtract 2.50

  q = 10 . . . . . . . . . . . . . . . . . . . . divide by the coefficient of q

Then the number of dimes is ...

  25 -10 = 15

Tony has 15 dimes and 10 quarters.

5 0
3 years ago
Your friend is looking at laptops for college, and is comparing the different screen sizes. Use the diagram and formula below to
elena-14-01-66 [18.8K]
For this case what we should do is write correctly the given equation:
 D ^ 2 = W ^ 2 + H ^ 2
 We substitute the values:
 D = 17inch
 H = 9inch
 Substituting:
 17 ^ 2 = W ^ 2 + 9 ^ 2
 We clear the value of W:
 W = root (17 ^ 2 - 9 ^ 2)
 W = 14.4 inch
 Answer:
 
The width of the laptop screen is:
 
D. W = 14.4 inch
5 0
3 years ago
Read 2 more answers
A cylinder has a height of 1 foot and a radius of 1 foot. What is its volume? Use ​ ≈ 3.14 and round your answer to the nearest
scoray [572]

the answer is in your question lol.

its pi, which is

≈ 3.14 feet ^3

^^^ thats

ur answer

8 0
3 years ago
Help please anyone?!‼️
hodyreva [135]

Answer:

-20.1 degrees Celsius

Step-by-step explanation:

The system started at -12.6 Celsius. It then cooled 7.5 degrees during a reaction. Because it cooled, that means the difference is negative.

-12.6 degrees Celsius - 7.5 degrees Celsius = -20.1 degrees Celsius

It is important to always remember your correct names and variables for numbers in chemistry!

7 0
4 years ago
Read 2 more answers
the histogram shows the result of survey asking students how many windows are in their homes how mnay studengs have less than 10
serious [3.7K]

Answer:

4 students

Step-by-step explanation:

Although I am not sure if I am completely correct. I’ll try my best.

<u>We know:</u>

The numbers 0-12 on the frequency table is the number of windows.

The numbers on the bottom is the amount of students.

-

<u>What we can see:</u>

As we can see..

  • the 0-4 section in the table shows that only 0-4 students have 9 windows.
  • The 5-9 sections shows that only 5-9 students have 10 windows.
  • The 10-14 sections shows that 10-14 students have 0 windows.
  • The 15-19 sections shows that 15-19 students have 4 windows.
  • The 20-24 sections shows that 20-24 students have 2 windows.

-

<u>Calculations:</u>

Since the number of students that have the amount of windows less than 10 is 4 (0-4 section) and 0 (10-14 section)

Add.

4+0

= 4

Therefore, 4 students have less than 10 windows.

<u />

4 0
3 years ago
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