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Tasya [4]
3 years ago
13

What's the area of the composite figure below ?

Mathematics
1 answer:
JulsSmile [24]3 years ago
3 0

Answer:

31.13

Step-by-step explanation:

If you look carefully, you will find a semicircle and a triangle.

The total area is =

\frac{\pi r^{2}}{2} + \frac{1}{2} \times base \times height\\

  • r = 4 - 0 = 4
  • base = |-4-0 | = 4
  • height = 14 - 9 = 5

So if we put the values:

\frac{\pi \times 4^{2}}{2} + \frac{1}{2} \times 4 \times 3\\= 31.13

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If a starting number is 30 and it falls to 11 what % decrease is that?
jonny [76]

Answer:

The question would've given you to what number you should round up your answer.

Answer is:

Whole number:

63%

1 decimal place:

63.3%

2 decimal places:

63.33%

Exact number:

\frac{190}{3}%

Step-by-step explanation:

So the starting no. = 30

Ending no. = 11

In order to evaluate the percentage of decrease we:

(Ending number/starting number) * 100

So:

\frac{11}{30} *100 = \frac{11}{3} *10 = \frac{110}{3}%%

To find the Decrease percentage:

100 % - 110/3 %

= 63.333%

3 0
3 years ago
What the answer and how do you solve it pls
Sergeu [11.5K]
A desk costs $44, but they boost the price 150%
44( \frac{150}{100} ) = 66



They are selling it at $66 (selling price)
Since Michelle sold it at $66 and she earns 20% on the selling price as commission, then it is simply

66( \frac{20}{100} ) = ?

That should be the commision amount michelle earns
4 0
3 years ago
Write an equation in slope intercept form of the line containing the points (3,-1) and<br>(6,7).​
liq [111]

Answer:

m - 8/3

Step-by-step explanation:

Find the slope of the line between (-3,1) and (6,7) using m = (y2 - y1) / (x2-x1)

which is the change of "y" over the change of "x"

m = (7 - (-1) / 6 - (3)

m = 8/3

5 0
3 years ago
What's the meaning of –(–3)?
Liula [17]

Answer:

+3

Step-by-step explanation:

if your subtracting a negitive it means your adding and its now a positive

4 0
2 years ago
Read 2 more answers
What is the gradient of the blue line?? Mathswatch
yaroslaw [1]

Answer:

gradient = -5

Step-by-step explanation:

A line passes (x1, y1) and (x2, y2) has the gradient (slope) which is calculated by:

gradient = (y2-y1)/(x2-x1)

As shown in picture, this blue line passes (-1, 0) and (0, -5)

=> gradient = (-5 - 0)/(0 - -1) = -5/1 = -5

Hope this helps!

3 0
3 years ago
Read 2 more answers
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