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pishuonlain [190]
3 years ago
12

Solve,justify and check: 3(7+5n)=6n+6(1+4n)

Mathematics
2 answers:
jenyasd209 [6]3 years ago
6 0
The answer should be 1=n
vlabodo [156]3 years ago
4 0

Answer:

1=n

Step-by-step explanation:

Step 1- Distribute into the parenthesis.

7(3)+5(3)n= 6n+1(6)+4(6)n

Step 2- Multiply

21+15n= 6n+6+24n

Step 3- Add common variables to simplify.

21+15n= (24n+6n)+6

21+15n= 30n+6

Step 4- Subtract the smallest variable to both sides.

21+15n= 30n+6

   -15n  -15n

21= 15n+6

Step 5- Subtract 6 to both sides.

21= 15n+6

-6           -6

15= 15n

Step 6- Divide both sides by 15.

<u>15</u>= <u>15n</u>

15   15

1=n

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5.75% of x = 28000<br> What is x?
kkurt [141]

Answer:

x = 486956.5217

Step-by-step explanation:

5.75% of x = 28000

Of means multiply

Change the percent to a decimal

.0575 * x = 28000

Divide by .0575 on each side

.0575/.0575 * x = 28000/.0575

x = 486956.5217

8 0
3 years ago
A flagpole broke in a storm. It was originally 81 8181 feet tall. 28 2828 feet are still sticking straight out of the ground, wh
solong [7]

Answer:

The end of the flagpole is 50.79 ft away from the base of the pole.

Step-by-step explanation:

The problem is represented by the diagram below.

The broken flagpole forms the shape of a right angled triangle. We need to find one of the sides of the triangle, the adjacent (x).

The hypotenuse is the broken part of the flagpole (53 ft), while the opposite is the part of the flagpole that is still stuck to the ground (28 ft).

Using Pythagoras theorem, we have that:

hyp^2 = adj^2 + opp^2

=> 53^2 = x^2 + 28^2

3364 = x^2 + 784\\\\=> x^2 = 3364 - 784\\\\x^2 = 2580\\\\x = \sqrt{2580}\\ \\x = 50.79 ft

The end of the flagpole is 50.79 ft away from the base of the pole.

7 0
3 years ago
Write each exponential function. <br>​
Dmitriy789 [7]

Answer:

0,4 1,2 2,1 3.5 4.25

Step-by-step explanation:

because i know

6 0
3 years ago
Itzik 45 seconds to fill an 18 down container how long will it take to fill a 40 gallon container
Akimi4 [234]
When answering this question, I'm assuming "18 down" means 18 gallons
To find the answer, we can divide:
40/18 = 5
( This basically means that there are 5 containers in the 40 gallon container)
knowing this:
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4 0
3 years ago
Read 2 more answers
Which property can you use to solve 5(6+9)
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Answer:

Step-by-step explanation:

3 0
3 years ago
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