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defon
3 years ago
10

Divide £72cm in the ratio 2:3:1 working out please

Mathematics
1 answer:
ale4655 [162]3 years ago
4 0
2:3:1
2+3+1 = 7

£72 / 7 = £10.28

Answer:
£10.28 * 2 = £20.56
£10.28 * 3 = £30.84
£10.28 * 1 = £10.28

If you want to check if it's correct. add all three of them and see if you get the £72.

Please make this answer the brainiest!
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Write an equation for an exponential growth function where the initial population is 80 and the population quadruples during eac
liq [111]
f(t) = 80(4^t)

For each time period, each time "t" increases by one, the population will be multiplied by 4.
6 0
3 years ago
HELP PLSSSSS I GIVE BRAINLY
dedylja [7]

Answer: 40 unit²

Step-by-step explanation:

A square pyramid is composed of 1 square and 4 congruent triangles

STEP ONE. Find the area of the square.

A=b²

b=base

A=b²=4²=14

STEP TWO. Find the area of the triangle

A=(1/2)bh

b=base

h=height

A=(1/2)bh

A=(1/2)(4)(3)

A=(1/2)(12)

A=6

There are 4 congruent triangles, so 6×4=24

The surface area of whole=24+16=40 unit²

Hope this helps!! :)

Please let me know if you have any questions

7 0
3 years ago
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Irina-Kira [14]
The answer to your problem is a<-2
6 0
3 years ago
Help! <br> Find the value of X and simplify completely.
Svetach [21]

Answer:

x = 8√5

Step-by-step explanation:

In the figure attached, there are three right angle triangles.

So, by Pythagoras theorem,

y²+ 4² = z²

y² + 16 = z²------(1)

Similarly x² = 16² + y²--------(2)

and (16 + 4)² = x² + z²

20² = x² + z²-------(3)

Now we put the value of z² from equation 1 to equation 3

20² = x² + y² + 16

x² + y² = 400 - 16

x² + y² = 384

y² = 384 - x²------(4)

Now we put the value of y² from equation 4 to equation 2

x² = 16² + 384 - x²

2x² = 256 + 384

2x² = 640

x² = 320

x = 8√5

Therefore x = 8√5 will be the answer.

8 0
3 years ago
Read 2 more answers
In a standard Normal​ distribution, if the area to the left of a​ z-score is about 0.3500​, what is the approximate​ z-score? Dr
wlad13 [49]

Answer:

z-score=0.385

(See attached picture)

Step-by-step explanation:

The procedure to find the z-score will depend on the resources we have available. I have a table with the area between the mean and the value we wish to normalize, so the very first thing we need to do is precisely find this area we need to analyze.

Everything to the left of thte mean will represent 50% of the data, so we start by subtracting:

50%-35%=15%

so we need to look in the table for the value 0.15.

In my table I can see that for an area of 0.15, the z-score will be between 0.38 (z-score of 0.1480) and 0.39 (z-score of 0.1517).

By doing some interpolation, you can determine a more accurate value of the z-score to be 0.385.

4 0
4 years ago
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