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igomit [66]
2 years ago
13

A painter uses a roller to paint a wall. The roller has a radius of 5 inches and a height of 13 inches. In one roll, what is the

area of the wall that he will paint? What is the area that he will paint in 3 rolls?? Use 3 for pie
Mathematics
1 answer:
vampirchik [111]2 years ago
5 0
<span>The area of wall that will be painted in one roll would be equal to the curved surface area of the roller. Therefore, the curved surface area of roller= 2*pie*radius*height Given: pie=3 So, Curved Surface Area of the roller=2*3*5*13 sq. in. = 390 sq.in Therefore, Area of the wall painted in one roll is equal to 390 sq.in. While Area of the wall painted in 3 rolls will be (390*3) or 1170 sq.in</span>
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ABCD×9=DCBA<br>(what is the value of A, B, C and D)​
Anettt [7]

Answer:

0

Step-by-step explanation:

The only value that would make sense is if at least one of the variables (A , B , C , D) is 0 (if not all of them). When multiplied, the answer will still be 0, thereby making the equation true.

~

4 0
3 years ago
Pls answer all :D tysmm ill mark brainliest
jek_recluse [69]

Answer:

13= -13

14= 57

15= 216

Step-by-step explanation:

hoep this helps

6 0
2 years ago
Please fill in the blanks i need this
likoan [24]

Answer:

110

242

Step-by-step explanation:

To get the amount for Number of ships 5. you do 5*22.

Same for the the #11. you do 11*22.

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8 0
2 years ago
1. What is a perfect square? 2. What is the square root of 4x²? 3. What is the square root of 25? 4. Factor 4x² + 20x + 25.
Ulleksa [173]

Answer:

Step-by-step explanation:

1) A perfect square is a whole number which is a product of a smaller whole number and itself. Examples of perfect squares are

4(2 × 2)

9(3 × 3)

16(4 × 4)

25(5 × 5)

36(6 × 6)

2) Square root of 4x² is 2x(product of square root of 4 and square root of x²)

3) square of 25 is 5

4) 4x² + 20x + 25

The general formula for solving quadratic equations is expressed as

x = [- b ± √(b² - 4ac)]/2a

From the equation given,

a = 4

b = 20

c = 25

Therefore,

x = [- 20 ± √(20² - 4 × 4 × 25)]/2 × 4

x = [- 20 ± √(400 - 400)]/8

x = [- 20 ± 0]/8

x = - 20/8

x = - 2.5

3 0
3 years ago
Simplify without the absolute value |x+3| ; if x&gt;2
inna [77]

Answer:

x+3 if x>2

Step-by-step explanation:

Recall some following basic ideas about absolute value:

|0|=0 or I guess -(0)=0

|3|=3

|-3|=-(-3) or just 3 but there is a reason why I wrote it the way I did.

You see that the absolute value returned the same value if the value was positive.

You see that the absolute value returned the opposite value if the value was negative.

You can include 0 in either.

Let's look at |x+3| alone for a second.

*|x+3|=x+3 if x+3 is positive or zero.

When is x+3 positive or zero? [greater than or equal to 0]

x+3\ge 0

Subtract 3 on both sides

x\ge -3

*|x+3|=-(x+3) if x+3 is negative or zero.

When is x+3 negative or zero? [less or equal to 0]

x+3\le 0

Subtract 3 on both sides

x\le -3

So looking at the bullet points (the *), x>2 fits into the first inequality.

Therefore, |x+3|=x+3.

8 0
2 years ago
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