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3 years ago

What is the difference between a number a and 6 written in a expression

Mathematics

1 answer:

emmasim [6.3K]3 years ago

4 0

Answer:

"((6))" is known number that we can't place any other numbers instead of it

but

"((a))" is unknown number that we can place any other number we want instead of it.

that's the defference between them.

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3 years ago

Sandra saves 12% of her salary for retirement. This year her salary was $3,000 more than in the previous year, and she saved $4,

tensa zangetsu [6.8K]

Answer:

Step-by-step explanation:

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3 years ago

Oliver and Lenny started hiking a hill simultaneously from the bottom to the top. Oliver hiked at a speed of 5 km/h during the f

Vilka [71]

Answer:

Oliver and Lenny reached the top of the hill at the same time

The proportion of time Oliver spent hiking to that of Lenny is 1:1

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Oliver's speed = 5 km/h during the first half, then decreased his speed to 4 km/h during the second half.

Lenny's speed = 4 km/h during the first half, then increased his speed to 5 km/h in the second half.

2. Who reached the top of the hill first? What is the proportion of time he spent hiking to that of his friend?

Let's assume the distance from the bottom to the top of the hill is 10 kilometers for calculating the time it will take Oliver and Lenny to reach the top of the hill:

Speed = Distance/Time

Time = Distance/Speed

Oliver = Time of hiking first 5 km + Time of hiking second 5 km

Lenny = Time of hiking first 5 km + Time of hiking second 5 km

Oliver = 5/5 + 5/4

Oliver = 1 + 5/4 = 2 1/4 hours

Lenny = 5/4 + 5/5

Lenny = 5/4 + 1 = 2 1/4 hours

Oliver and Lenny reached the top of the hill at the same time

The proportion of time Oliver spent hiking to that of Lenny is 1:1

4 0

3 years ago

Jack crawled 4 ft and Christine crawled 3⁄4 the distance Jack crawled. If you add the distance they each crawled together, what

stepan [7]

Before going into the details of the problem, let us first write down the most important information required for solving this problem.
1 ft = 12 inches
The distance that was crawled by Jack = 4 ft
      = (4 * 12) inches
      = 48 inches
The distance crawled by Christine = 3/4 of the distance crawled by Jack
   = (3/4) * 48 inches
   = 3 * 12 inches
   = 36 inches
Then
The total distance crawled by the two children's = (48 + 36) inches
   = 84 inches
So Jack and Christine together crawled a distance of 84 inches.

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3 years ago

Read 2 more answers

What is the answer to graphing this equation y= -4x

MAXImum [283]

Answer:

x=0

Step-by-step explanation:

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3 years ago