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Vera_Pavlovna [14]
2 years ago
15

A boy is 20 years old at present. How old was he 3 years ago?​

Mathematics
1 answer:
EleoNora [17]2 years ago
3 0

Answer: seven-teen

Step-by-step explanation:twenty minus three

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Pls pls help! super desperate. find the lateral surface areas of the shapes shown in the photo
Alja [10]

Answer:

3- 0.14   2- 841

Step-by-step explanation:

3- 0.7*0.2=0.14

2- 56/2= 28

   28*28+29*29= 841*841

   square root of 841*841= 841

3 0
3 years ago
South Celestial Pole is at the South Point
9966 [12]

Answer:

<em>The south celestial pole is the point in the sky directly above Earth's southern axis. It's the point around which the entire southern sky appears to turn. The height of the south celestial pole in your sky depends on your latitude.</em>

Step-by-step explanation:                              

3 0
3 years ago
James drove 6 miles south and then 3 miles west.how far is he from his starting point
Minchanka [31]

Answer:

9 miles

Step-by-step explanation:

A 6+3 is nine

7 0
3 years ago
To estimate the height of a totem pole, Jorge uses a small square of plastic. He holds the square up to his eyes and walks backw
Ghella [55]

The height of the pole is 6.50 meters

<h3>How to calculate the height?</h3>

To calculate the height of the pole, we will use of the following equivalent ratios.

By Pythagoras theorem, we have:

x ^2 = 2^2 + 3^2\\\\x ^2 = 4 + 9\\\\x = \sqrt{13}

So, we have:

h = \dfrac{\sqrt{13}^2 }{2} \\\\h = \dfrac{13}{2}\\\\h = 6.5

Hence, the height of the pole is 6.50 meters

Read more about Pythagoras' theorem at:

brainly.com/question/654982

#SPJ1

7 0
1 year ago
Find all pairs of natural numbers which can be the solution to the equation a+b=42.
Setler [38]

Answer:

(1,41), (2,40), (3,39), (4,38), (5,37), (6,36), (7,35), (8,34), (9,33), (10,32), (11,31), (12,30), (13,29), (14,28), (15,27), (16,26), (17,25), (18,24), (19,23), (20,22), (21,21), (22,20), (23,19), (24,18), (25,17), (26,16), (27,15), (28,14), (29,13), (30,12), (31,11), (32,10), (33,9), (34,8), (35,7), (36,6), (37,5), (38,4), (39,3), (40,2), (41,1).

Step-by-step explanation:

To find all pairs of natural numbers which are solution to a+b=42, we need to first choose a value to one of them (let's choose 'a'), and that value will be the lowest possible, so we begin with a=1, and then we increase to 2, and 3, and so on.

For each value of a, we calculate the value of b using the equation.

So, starting with a=1, we have that b=41

Then, with a=2, we have that b=40, and so on.

Doing this until a=41 (so b=1 will be the lowest value possible for b), we have the pairs of natural number we want:

(1,41), (2,40), (3,39), (4,38), (5,37), (6,36), (7,35), (8,34), (9,33), (10,32), (11,31), (12,30), (13,29), (14,28), (15,27), (16,26), (17,25), (18,24), (19,23), (20,22), (21,21), (22,20), (23,19), (24,18), (25,17), (26,16), (27,15), (28,14), (29,13), (30,12), (31,11), (32,10), (33,9), (34,8), (35,7), (36,6), (37,5), (38,4), (39,3), (40,2), (41,1).

5 0
3 years ago
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