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3 years ago

Solve for n. 7n - 4 = 317 n =

Mathematics

2 answers:

MatroZZZ [7]3 years ago

6 0

Step-by-step explanation:

$7n - 4 = 317 \\ 7n = 317 + 4 \\ 7n = 321 \\ n = \frac{321}{7} \\ n = 45 \frac{6}{7}$

Andrew [12]3 years ago

6 0

Answer:

$n = \frac{321}{7}$

Step-by-step explanation:

1) Add 4 to both sides.

$7n = 317 + 4$

2) Simplify 317 + 4 to 321.

$7n = 321$

3) Divide both sides by 7.

$n = \frac{321}{7}$

Therefor, the answer is n = 321/7 and in decimal form it would be, 45.857143.

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The Gotemba walking trail up Mount Fuji is about 9km long. Walkers need to return from the 18km walk by 8pm. Toshi estimates tha

stiv31 [10]

Answer:

Toshi must begin his walk at 11:00 AM in order that he can return by 8:00 PM.

Step-by-step explanation:

Since the Gotemba walking trail up Mount Fuji is about 9km long, and walkers need to return from the 18km walk by 8pm, if Toshi estimates that he can walk up the mountain at 1.5km / h on average, and down at twice that speed , these speeds taking into account meal breaks and rest times, to determine what is the latest time he can begin his walk so that he can return by 8pm the following calculation must be performed:

Climb: 1.5 km / h

Descent: 2 x 1.5 km / h = 3 km / h

Climb: 9 km / 1.5 km / h = 6 hours

Descent: 9km / 3 km / h = 3 hours

Total: 9 hours

8 PM = 20:00

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Thus, Toshi must begin his walk at 11:00 AM in order that he can return by 8:00 PM.

3 0

3 years ago

The perimeter of the rectangle below is 120 units. Find the value of y. 5y - 3 4y

vladimir2022 [97]

Answer:

y =7

Step-by-step explanation:

2(5y-3)+2(4y) = 120 units

10y - 6 + 8y = 120 units

18y= 120+6

y = 126/18

y = 7

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3 years ago

What is the missing term? -4.-12.x 12.-4 . 2x ? 2.2 3х +1

Murrr4er [49]

Answer:

Step-by-step explanation:

The question is not displaying correctly.

4x·3x = 12x²

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3 years ago

A rectangle has length represented as (R +5) and width represented as (R + 2).

svetlana [45]

Answer:

4(R + 5 + R + 2) [Option B]

Step-by-step explanation:

GIVEN :-

Length = R + 5
Width = R + 2

TO FIND :-

Perimeter of the rectangle

FORMULAE TO BE USED :-

For a rectangle with length 'l' and width 'w' , its perimeter = 4(l + w)

SOLUTION :-

Perimeter = $4(R + 5 + R+2)$

= $4(2R + 7)$

= $8R + 14$

7 0

2 years ago

The ages of three siblings Jason John and Jackson totals 21 years. Jason is one year older than John. Jackson is three times as

Ymorist [56]

Answer:Jason is 5 years old.

John is 4 years old.

Jackson is 12 years old.

Step-by-step explanation:

Let x represent the age of Jason.

Let y represent the age of John.

Let z represent the age of Jackson.

The ages of three siblings Jason John and Jackson totals 21 years. It means that

x + y + z = 21 - - - - - - - - - - -1

Jason is one year older than John. It means that

x = y + 1

Jackson is three times as old as John. It means that

z = 3y

Substituting x = y + 1 and z = 3y into equation 1, it becomes

y + 1 + y + 3y = 21

5y = 21 - 1 = 20

y = 20/5 = 4

x = y + 1 = 4 + 1

x = 5

z = 3y = 3 × 4

z = 12

6 0

3 years ago