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stepladder [879]
3 years ago
6

Solving the problem

Mathematics
1 answer:
aalyn [17]3 years ago
6 0
You have to multiply the centimeters. Ex: 4 cm × 4 cm × 4 cm = 12 cm. So the area would be 12 cm. Same with all the others, just multiply.
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Two parallelogram-shaped pieces of tile have the same area. One has a base of 20 centimeters and a height of 15 centimeters. The
gtnhenbr [62]

Answer:

height = 12 cm

Step-by-step explanation:

Parallelogram 1:

Area =  base *height = 20 * 15 = 300 sq. cm

Area of parallelogram 2 = area of parallelogram 1

25 * height = 300

       height = 300/25

height = 12 cm

8 0
3 years ago
The sum of two numbers is 46 the difference is 16
Sindrei [870]
31 and 15

31+15=46

31-15=16
3 0
3 years ago
Read 2 more answers
The principal of a large high school wants to know if students spend more than 1 hour doing homework per night, on average. To i
MrRissso [65]

Answer:

If we define the random variable X ="time spend by the students doign homework"

And we want to tes t is students spend more than 1 hour doing homework per night, on average (alternative hypothesis), so then the system of hypothesis for this case are:

Null hypothesis: \mu \leq 1

Alternative hypothesis: \mu >1

And they wnat to use a sample size of n = 100 and a significance level of 0.05

Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

Solution to the problem

If we define the random variable X ="time spend by the students doign homework"

And we want to tes t is students spend more than 1 hour doing homework per night, on average (alternative hypothesis), so then the system of hypothesis for this case are:

Null hypothesis: \mu \leq 1

Alternative hypothesis: \mu >1

And they wnat to use a sample size of n = 100 and a significance level of 0.05

7 0
3 years ago
M i crrect please explain
kvv77 [185]
I got -6/25 Sorry I can't really explain this try web2.0calc.com it helps alot with math.
8 0
4 years ago
Read 2 more answers
In a sale, there is 50% off all prices. A chair costs £17.50 in the sale. How much was it before the sale?
HACTEHA [7]
£17.50 is 50% of what number
Now the same in math:
£17.50 = .50 x n pr £17.50 = .5n
Divide both sides by .5
n= £ 35
7 0
4 years ago
Read 2 more answers
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