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3 years ago

400% of a number is 45. Find the number

2 answers:

5 0

400% = 400/100

Write an equation; 400% of which number is equal to 45

400/100x = 45
400x = 4500
x = 4500/400
x = 11.25 this is the number

Check (400x11.25) / 100 = 45

horsena [70]3 years ago

3 0

The answer is is 180

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The school soccer coach records the number of goals some players have scored so far this season. The dot plot of the number of g

yuradex [85]

Answer:

the means absolute deviation is 1.8

the striking deviation is 7

(it is because the data point on the far right of the graph)

Step-by-step explanation:

calculate the absolute deviation:

1. calculate the mean (add all numbers and divide by 10) = 2.6

2. find the absolute value of each

2.6 - 0 = 2.6

2.6 - 1 = 1.6 (you have 1's 4 times so each one will be 1.6)

2.6 - 3 = 0.4

2.6 - 4 = 1.4 (you have 4's 3 times)

2.6 - 7 = 4.4

3. Then add all of those values together

2.6 + 1.6 + 1.6 + 1.6 + 1.6 + 0.4 + 1.4 + 1.4 + 1.4 + 7.4 = 18

4. find the mean of the difference

18/10 = 1.8

3 0

3 years ago

The number 66 is increased to 72. What is the percentage by which the number was increased, to the nearest tenth of a percent?

Lunna [17]

Answer:

The increase is 9.1%

Step-by-step explanation:

Step 1: Make an equation

$66 * x = 72$

$66x = 72$

Step 2: Divide both sides by 66

$66x / 66 = 72 / 66$

$x = 1.09090$

Step 3: Find the increased

$1 - 1.09090$

$0.091 * 100$

9.1%

Answer: The increase is 9.1%

6 0

2 years ago

Jefferey Says he has 6.8 dollars. How to you write the decimal 6.8 when it refers to money? Explain.

Bogdan [553]

6 Dollars and 80 cents

8 0

2 years ago

Read 2 more answers

The mode of 100 120 120 140 140 100

Monica [59]

Answer:

100, 120, 140

Step-by-step explanation:

The mode is the value that occurs most often in the sequence. All the numbers occur twice

7 0

2 years ago

Read 2 more answers

Question Help

lorasvet [3.4K]

Answer:

The speed of the boat is 20 km/hr

Step-by-step explanation:

Let s be the speed of boat in still water

Let d be the distance

Upstream speed = s-4

Jane took 30 min to drive her boat upstream to water-ski at her favorite spot.

So, Distance traveled in upstream = $Speed \times time =(s-4) \times \frac{30}{60}$

Downstream speed = s+4

So, Distance traveled in downstream = $Speed \times time =(s+4) \times \frac{20}{60}$

So, $(s-4) \times \frac{30}{60}=(s+4) \times \frac{20}{60}$

30s-120=20s+80

10s=200

s=20

Hence The speed of the boat is 20 km/hr

6 0

2 years ago