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padilas [110]
3 years ago
15

15 points and BRAINLIEST

Mathematics
2 answers:
loris [4]3 years ago
3 0
They all are 0 why
Mrrafil [7]3 years ago
3 0

Answer:

0 ≤ x ≤ 8.8

Step-by-step explanation:

8.8 • 2.5 = 22 so I think 8.8 is the answer because the other options don’t make sense when multiplied by 2.5.

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Which graph shows a negative rate of change for the interval 0 to 2 on the x-axis?
777dan777 [17]

Answer:

THE ANSWER OM EDGE IS (C)

UR WELCOME

Step-by-step explanation:

have a great day :)

7 0
3 years ago
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A train travels 50 km in 1 hour and then 96 km in 4 hours what is its average speed​
svet-max [94.6K]

Answer: 37 km per hour

Step-by-step explanation: 96/4=24

24+50=74

74/2=37

8 0
3 years ago
How much of an alloy with 30% copper must be added to 25 pounds of a second alloy that is 20% copper to create a 27% alloy? 33.8
yuradex [85]

Answer:

58.33 lbs.

Step-by-step explanation:

There are already 25 lbs of alloy of copper

Of this 25 lbs, 20% is pure i.e. copper content = 25(0.5) = 5lbs.

Now available is

Copper      Other metals

5 lbs                20 lbs

Let x lb of 30% copper is added.

Then new alloy will have 5+0.3x lb copper in total of 25+x lbs

Percentage pure = \frac{5+0.3x}{25+x} =27%

Simplify to get

\frac{5+0.3x}{25+x} =\frac{27}{100} \\\\Cross multiply:\\27(25+x) =100(5+0.3x)\\500+30x =675 +27x\\3x = 175\\x = 175/3 = 58.33 lbs

Hence answer is 58.33 lbs should be added.



8 0
3 years ago
Read 2 more answers
Select the correct answer. Which number has a terminating decimal expansion? A. 2/7 B.√12 C. 5/8 D. 2/11
quester [9]

Answer:

Option C is correct option.

Step-by-step explanation:

We need to determine which number has a terminating decimal expansion.

<em>Terminating decimal </em>

<em>A decimal number that contains a finite number of digits after the decimal point is called terminating decimal . </em>

<em>for example 0.123 is terminating decimal as it has finite number of digits after decimal point.</em>

Now, we will look at each option to find the terminating decimal

A. 2/7

Converting in decimal form: 0.28571....

As it doesn't contain finite numbers after decimal point, so 2/7 is not terminating decimal.

B.√12

Converting in decimal form: 3.46410....

As it doesn't contain finite numbers after decimal point, so √12 is not terminating decimal.

C. 5/8

Converting in decimal form: 0.625

As it contain finite numbers after decimal point, so 5/8 is terminating decimal.

D. 2/11

Converting in decimal form: 0.18181....

As it doesn't contain finite numbers after decimal point, so 2/11 is not terminating decimal.

Therefore, Option C is correct option.

4 0
3 years ago
Use the probability distribution graph to answer the question. P(X≤a)=0.6 What is the value of a?
Stella [2.4K]
Answer: If P(x<a) = 0.6, then the value of a will be 0.25.

In this type of problem, it is safe to assume the normal distribution unless you are told something different. 

In this probability, we have to find the z-score for a that gives a probability of 0.6. You will need a normal distribution chart to do this problem. Just find the probability that is closest to 0.6 and use that z-score.
8 0
3 years ago
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