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3 years ago

Find the value of x in the picture please

Mathematics

1 answer:

nika2105 [10]3 years ago

8 0

The answer is B-40.

It is an acute angle so it can not be 155 but the angle does not look like it is close to being 90 degrees so the answer has to be 40!

Hope this helps(can I get brainliest)

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Fill the missing ones in if you do i will you give you a crown thing plsssss helpp

hoa [83]

Answer:

3. Hardness

4. Streak

5. Density

6. Crystal

Step-by-step explanation:

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3 years ago

a machine takes 2.8 hours to make 9 parts .at that rate how many parts can the machine make in 28.0?

puteri [66]

I multiplied 28.0*9 and got 252.Hope this helps

3 0

4 years ago

What is 21% of 30.00

sveta [45]

21% of 30.00 is 6.3. I hoped this helps!!!

6 0

3 years ago

Read 2 more answers

Example 2

PIT_PIT [208]

Answer: (a) 314.2cm², (b) 157.1cm², (c) 78.55cm² (e) 6.77

Step-by-step explanation: (a) Area of the circle with radius of 10 cm = πr²

= 3.142 × 10 × 10

= 3.142 × 100

= 314.2cm²

The formula = πr²

(b) Area of the half of a circle known as semicircle

= πr²/2

= 3.142 ×10 × 10/2

= 3.142 × 50

= 157.1cm²

The formula = πr²/2

= πr²/4

= 3.142 × 10 × 10/4

= 314.2/4

= 78.55cm²

The formula is written thus = πr²/4, which implies that the circle is divided into 4 unit

(d) The conjecture about how to determine the area of the sector is

Formula of a sector = ∅/360(πr²)

<u>Information</u>

The arc cant be 60°, therefore information incomplete.

(e) Area of the sector with the angle AOB of 60° = 24.

To find the radius of the angle, make v the subject of the formula from the formula.

Sector area = πr²∅/360°

equate formula to 24.

Therefore πr²∅/360° = 24

Multiply through by360° to make it a linear expression

It now becomes πr²∅ =24× 360°

r² = 24 x 360/π × ∅°

r² = 24 × 360° /3.142 × 60°

r² = 3,640/188.52

r² = 45.8

To find r , we take the square root of both side by applying laws of indicies

Therefore r = √45 .8

r = 6.77

(f) General formula = ∅°/360° × (πr²)

angle substended at centre by the arc = x°

assuming the radius of the circle = ycm, Therefore, area of the sector = { ∅°/360° × πy² }

8 0

3 years ago

What is the formula and slope of (18, -7) and (18, 2)

Luden [163]

Answer:

Step-by-step explanation:

Coordinate points: (18, -7) and (18,2)

m= rise / run or $\frac{ y_2 - y_1} {x_2 - x_1}$

m = slope

(x1, y1) = coordinates of first point in the line

(x2, y2) = coordinates of second point in the line

So your rise is...

2 - (-7)

and you run is...

18 -18

Rise = 9

Run = 0

Now, do you see the issue...

You can not have a number over 0 (* a great way to remember is N/0 spells no: "N" being number and "0" being zero)

The slope or the equation 9 / 0 (9 divided by 0 or 9 over 0) is ERROR in the calculator which means the slope of these points are undefined

The line is vertical when this happens

*Side Note: if you were to have 0 as you rise and 9 as your run, 0/9 is ok because that means you have a zero slope meaning that you have a horizontal line

0 divide by 9 is zero

4 0

3 years ago