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3 years ago

I need help w/ this problem...please don't answer if you don't know and PLEASE answer as fast as you can...I'm desperate.

Mathematics

2 answers:

Wittaler [7]3 years ago

7 0

There's a very simple rule for geometries like this. The measure of the arc is double the measure of the angle. It helps to remember this.

Your angle is 65°.
The measure of the arc is 2×65° = 130°.

Angelina_Jolie [31]3 years ago

7 0

You need to use the central angle.
If you know the radius or how CD works (does it go through the center), then the answer will be less vague. The central angle = 2 * 65 = 130
the length of BC is

130/360 * 2*pi*r
13/18 * pi r is the general answer.

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Solve each system by graphing: 4x + 6y = -12 2x + 3y = 6

Helga [31]

Answer: For the system given, there is no solution.

The slopes are the same for both equations, so the lines are parallel. With no intersection, there is no solution.

It may be easier to graph the system if you change the equations to slope intercept form y = mx + b

That locates the y-intercept, b and you can use the slope, m to plot additional points to draw the lines.

The attachment shows the graph of this system of equations.

Step-by-step explanation: Isolate y on the left

First equation:

4x + 6y = -12 Subtract 4x from both sides

6y = -4x -12 Divide both sides by 6

y = -4x/6 -12/6 Simplify

y = -2x/3 - 2 The y-intercept is -2, the slope is -2/3

Second equation:

2x + 3y = 6 Subtract 2x from both sides

3y = –2x + 6 . Divide both sides by 3

y = –2x/3 + 6/3 Simplify

y = –2x/3 +2 The y-intercept is -2, the slope is -2/3

At this point we see that the slopes are the same, so the lines are parallel.

6 0

3 years ago

Read 2 more answers

Based on the graph, how many students are represented? A) 100 students B) less than 150 C) less than 200 D) less than 300

kondor19780726 [428]

Answer:

Step-by-step explanation:

8 0

3 years ago

How many ones in 153

Oduvanchick [21]

153 = 153 ones
...................

8 0

4 years ago

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Each side of a square piece of cardboard is 22 inches long. What is the piece of cardboard's perimeter?

tia_tia [17]

88 inches long would be the answer

5 0

2 years ago

A company makes poppy lapel pins.

mezya [45]

Answer:

<h2>The required percentage is 65.45%.</h2>

Step-by-step explanation:

The total costing is $1000 \times 1.10 = 1100$

35% were given to the charity, hence 350 were given to the charity.

There are (1000 - 350) = 650 lapel pins remaining.

60% of 650 = $\frac{60}{100} \times 650 = 390$ werre sold for 3.00 each. Hence, earning from here is $390 \times3 = 1170$ .

40% of 650 = 260 were sold at 5.00 for 2. It can also be said that $\frac{260}{2} = 130$ were sold at 5.00 each. Earning from this section is $130 \times5 = 650$

Total earning is (1170 + 650) = 1820.

Profit percentage = $\frac{1820 - 1100}{1100} \times100 = \frac{720}{11} = 65.45$

5 0

3 years ago