Mario bought $5 worth of stamps at the post office. He bought ten more 6-cent stamps than 10-cent stamps. The number of 8-cent stamps was three times the number of 10-cent stamps. He also bought two 20-cent stamps. How many of each kind of stamp did he purchase?

Answers

Answer 1
Answer: He bought 2 20-cent stamps.
That is $0.40.
He spent $4.60 on the other stamps.

He bought x 6-cent stamps, y 10-cent stamps, and z 8-cent stamps.

y + 10 = x
z = 3y

6x + 10y + 8z = 460

6(y + 10) + 10y + 8(3y) = 460

6y + 60 + 10y + 24y = 460

40y + 60 = 460

40y = 400

y = 10

x = y + 10 = 10 + 10 = 20

z = 3y = 3(10) = 30

He bought
20 6-cent stamps
10 10-cent stamps
30 8-cent stamps
2 20-cent stamps

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Solve - 16y = da for d. The solution is d = [?]

Answers

Answer:

d = - (16y)/(a)

Step-by-step explanation:

given

- 16y = da ( isolate d by dividing both sides by a )

(-16y)/(a) = (da)/(a) , that is

(-16y)/(a) = d or

d = - (16y)/(a)

4) Eya is 5 years younger than 3 times Bill's age. If Eya is 28 years old, howold is Bill? Use an equation to solve. For the answer, only type Bill's age
Your answer

Answers

Bill would be 11 years old.

Answer:

bill would be 11 years old.

the expression 3x + 20 represents the elevation above sea level, in meters, of a rock climber after x minutes of climbing. what is the rock climber’s initial height above sea level?

Answers

Answer:

The rock climber’s initial height above sea level was 20 meters.

Step-by-step explanation:

This is because y-intercept is 20, meaning at time 0 minutes, the rock climber was at 20 meters.

What is base 1 of a trapezoid in which A=(48x+68) in^2, height =8, and base 2 = (9x + 12)

Answers

A=(1/2)(b1+b2)h = 

=(48x+68)in² = (1/2)( b1+(9x+12))8 


the answer is = b1= 3x+5

i hope that helped =D

What is 108 square root to the nearest tenth

Answers

The 108 square root value to the nearest tenth is approximately 10.4

What is 108 square root to the nearest tenth?

The square root of a number represents a value that, when multiplied by itself, results in the original number. In this case, we're looking for the square root of 108. We can use various methods such as long division, approximation techniques, or calculators to find this value.

When we calculate the square root of 108, we get a value of approximately 10.392304845413264.

However, since we are asked to round to the nearest tenth, the value becomes 10.4.

This means that when you square 10.4 (10.4 * 10.4), you get approximately 108.16, which is close to the original value of 108.

Read more about square root here: brainly.com/question/428672

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Answer:

the square root would be 10.4

Identify which table shows a direct variation.A.
Table 1 only







B.
Table 2 only







C.
both tables







D. neither table

Answers

the answer is A. Table 1 only the second table should be going by 9.6 but it isn't.