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faust18 [17]
3 years ago
10

If 2 = 6, 3 =12, 4 = 20, 5 = 30, 6 = 42 then 9 = ?

Mathematics
1 answer:
Soloha48 [4]3 years ago
6 0
At first you may get confused but look at those numbers carefully :)

as you see first result is divisible buy one of the product (second product in all cases is unknown)
so let's check where it will lead us :)

6/2=3

12/3=4

20/4=5

30/5=6

42/6=7

Now you can clearly see that every number was multiplied by number 1 higher than itself. 
2*(2+1)=6

3*(3+1)=12

4*(4+1)=20

etc...

it means that after equation sign there should be 90 because 

9*(9+1)=90 :)
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the area of the triangle below is 1/4 square meters. what is the length of the base. express your answer in simplest form
Alexeev081 [22]

Answer:

4/5

Step-by-step explanation:

<u>Given</u>,

Area of the triangle = 1/4 square meters

From the diagram,

Height = 2/5 m

<u>To find</u> : Length of the base

<u>Formula</u> : -

A = bh/2

Here,

A denotes Area

b denotes Base

h denotes Height

A = 1/4

h = 2/5

A = bh/2

Cross multiply,

A * 2 = bh

2A = bh

2 * (1/4) = b * (2/5)

(1 * 2)/4 = (b * 2)/5

2/4 = 2b/5

1/2 = 2b/5

Cross multiply,

1 * 5 = 2 * 2b

5 = 4b

b = 4/5 meters

Hence,

The length of the base is 4/5 meters.

5 0
2 years ago
Find the volume of the cylinder. Either enter an exact answer in terms of T or use 3.14 for T. With a height of 3 and a radius o
kobusy [5.1K]

Answer:

235.5‬

Step-by-step explanation:

V = πr²h

V = 3.14 x 5² x 3

V = 3.14 x 25 x 3

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V = 235.5‬

8 0
2 years ago
In a trapezoid with bases of lengths a and b, a line parallel to the bases is drawn through the intersection point of the diagon
mote1985 [20]

if we name that part x, then we can say

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3 0
3 years ago
A motorcycle cost $12,000 when it was purchased. The value of a motorcycle decreases by 6% each year. Find the rate of decay eac
dalvyx [7]
<span>the rate of decay each month can calculated using the following formula:
</span><span>
6%/year × 1 year/(12 months) = 0.5%/month
0.06 x 1/12 = 0.005/month
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4 0
3 years ago
Sarah has 128 stickers. alex has 10 fewer stickers than sarah. how many stickers does Alex have.
nikitadnepr [17]
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3 years ago
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