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2 years ago

Find the area of this shape please

Mathematics

2 answers:

dimulka [17.4K]2 years ago

8 0

Answer:

<u>Area of the right angled triangle</u><u>:</u><u>-</u>

= height × base ÷ 2

= 4 cm × 6 cm ÷ 2

= 4 cm × 3 cm

= 12 cm²

<u>Area of the rectangle</u><u>:</u><u>-</u>

= length × breadth

= 6 cm × 3 cm

= 18 cm²

<u>Area of the figure</u><u>:</u><u>-</u>

= 12 cm² + 18 cm²

= 30 cm²

Elena-2011 [213]2 years ago

7 0

<h3> $Area \:of\: rectangle = l \times b \\ = 3 \times 6 \\ = 18 {cm}^{2}$ </h3><h3> $Area\: of\: triangle = \frac{ab}{2} \\ = \frac{4 \times 6}{2} \\ = 12 {cm}^{2}$ </h3>

Total area = 12 + 18 = 30cm²

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You are making 10 tons of concrete that is 37.9% cement by mixing a 25% cement mixture with a 68% cement mixture.

Mnenie [13.5K]

The 10 tons should have 37.9% cement.

Let the 25% mixture be x tons

Then the 68% mixture will be (10 -x) tons.

Using formula for mixtures:
Let p for percentage and w for weight in tons.

p₁w₁ + p₂w₂ = pw

25*x + 68*(10-x) = 37.9*10

25x + 680 - 68x = 379

680 - 43x = 379

680 - 379 = 43x

301 = 43x

43x = 301

x = 301/43

x = 7

Recall that x, was for the 25% mixture, 7 tons.

a) For the 68% mixture, = 10 - x = 10 -7 = 3 tons.

b) For the 25% mixture = x = 7 tons.

6 0

2 years ago

Need help with 13 and 14

Svetach [21]

Answer:

13. A

14. C.

Step-by-step explanation:

A relation is a function if there is only one y assigned to each x.

That is if you have a set of points, there should be no repeated x value.

So looking at {(0,0),(-2,4),(-2,-4),(-3,7)} this is not a function because you have two x's that are the same. A.

The slope-intercept form of a linear equation is y=mx+b where m is the slope and b is the y-intercept.

The y-intercept is where the graph goes through the y-axis at. It goes through at -1 so b=-1.

The slope is rise/run. So starting from the y-intercept (0,-1) we need to find another point to count the rise & run to... How about (3,1)? That works. You can do the counting if you want. You could also use the slope formula.

To use the slope formula, I just like to line the points up vertically and subtract vertically then put 2nd difference over the 1st difference.

(0,-1)

-(3,1)

--------

-3 -2

So the slope is -2/-3 or just 2/3.

So the equation is y=2/3 x-1

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2 years ago

How old am I if 250 reduced by 5 times my age is 50?

Korolek [52]

250 - 5(x) = 50

250 (-250) - 5x = 50 (-250)

-5x = -200

-5x/-5 = -200/-5

x = 40

hope this helps

you are 40 years old!

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3 years ago

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AnnZ [28]

Answer:

52 doses

Step-by-step explanation:

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3 years ago

Use the box plots comparing the number of boy dogs and number of girl dogs attending doggy daycare each day for a month to answe

satela [25.4K]

The boxplots 1 and 2 represent the distribution of data using a five number summary for the male and the female attendance

The first box plot represents the male's boxplot.

So, we have:

Upper quartile (Q3) = 14
Lower quartile (Q1) = 2

The IQR is the difference between the above values

IQR = Q3 - Q1

So, we have:

IQR = 14 - 2 = 12

So: the IQR for the males' data is 12

<h3>(b) The difference in the median values</h3>

From the first and second boxplots, we have:

Median male = 10
Median female = 18

The difference (d) between these values is

d = 18 - 10

d = 8

So: the difference between the median values of each data set is 8

<h3>(c) The distribution of data</h3>

This is dependent on whether the dataset has an outlier or not.

From the figure, we have:

Male's data: presence of an outlier - use median
Female's data: absence of an outlier - use mean

So: the male dataset is measured by median, while the mean is a better measure of center for the female's data

<h3>(d) Reason for outliers</h3>

A possible reason for outliers is sampling problems