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3 years ago

Question 1. 50+50=? Question 2. 150+150=?

Mathematics

2 answers:

Mademuasel [1]3 years ago

6 0

Answer:

1 100

2 300

Step-by-step explanation:

Morgarella [4.7K]3 years ago

3 0

Answer:

100

300

Step-by-step explanation:

Just add them together

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Solve 2y - 18 = -26 for y

Musya8 [376]

Answer:

y=-4

Step-by-step explanation:

2y-18=-26

2y=-26+18

=-8

y=-8÷2

=-4

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2 years ago

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The general manager of an engineering firm wants to know whether a technical artist’s experience influences the quality of his o

Vladimir79 [104]

Answer:

Answer: The estimated equation is shown in the scattered plot diagram attached to the answer supplied

Step-by-step explanation:

(a) Attached scattered plot diagram

(b) Estimated regression equation:

Rating = 3.204 + 0.076 EXPER

b1= 3.204,

b2= 0.076

Se(b1)= 0.709

Se(b2) = 0.044

n=2

The coefficient of EXPER =0.076. This implies that the quality rating will increase by 0.076.

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3 years ago

there are 40 black balls this is 4 more than twice the number of yellow balls how many yellow boll are there

miss Akunina [59]

Answer:

There are 5 yellow balls

Step-by-step explanation:

40/4 = 10

10/2 = 5

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3 years ago

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Give at least five problems solving about area of a sector of a circle.

Katyanochek1 [597]

See below for the examples of sectors and arcs of a circle

<h3>Area of sector of a circle</h3>

The area of a sector is calculated as:

$A = \frac{\theta}{360} * \pi r^2$ ---- when the angle is in degrees

$A = \frac{\theta}{2} *r^2$ ---- when the angle is in radians

Take for instance, we have the following problems involving sector areas

Calculate the area of a sector where the radius of the circle is 7, and

The central angle is 30 degrees
The central angle is π/12 rad
The central angle is 90 degrees
The central angle is π/4 rad
The central angle is 180 degrees

Using the above formulas, the sector areas are:

1. $A = \frac{30}{360}* \frac{22}{7} * 7^2 = 12.83$

2. $A = \frac{\pi}{12} * 7^2 = 12.83$

3. $A = \frac{90}{360}* \frac{22}{7} * 7^2 = 38.5$

4. $A = \frac{\pi}{2} * 7^2 = 38.5$

5. $A = \frac{180}{360}* \frac{22}{7} * 7^2 = 77$

<h3>Examples of arc length</h3>

The length of an arc is calculated as:

$L= \frac{\theta}{360} * 2\pi r$ ---- when the angle is in degrees

$L = r\theta$ ---- when the angle is in radians

Take for instance, we have the following problems involving arc lengths

Calculate the length of an arc where the radius of the circle is 7, and

The central angle is 30 degrees
The central angle is π/12 rad
The central angle is 90 degrees
The central angle is π/4 rad
The central angle is 180 degrees

Using the above formulas, the arc lengths are:

1. $L = \frac{30}{360}* 2 * \frac{22}{7} * 7 = 3.7$

2. $L = \frac{\pi}{12} * 7 = 3.7$

3. $L = \frac{90}{360}*2 * \frac{22}{7} * 7 = 11.0$

4. $L = \frac{\pi}{4} * 7 = 11$

5. $L = \frac{180}{360}*2 * \frac{22}{7} * 7 = 22$

<h3>Examples of the arcs of a circle</h3>

The examples include:

A parabolic path
Distance in a curve
Curved bridges
Pizza
Bows