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Art [367]
3 years ago
6

Factorise y squared -9w squared

Mathematics
1 answer:
Jlenok [28]3 years ago
6 0
Y^2 - 9w^2
= y^2 - 3^2w^2
=(y + 3w)(y - 3w)
You might be interested in
2) A circle has an area of 121 ñ cm. Find its circumference. (Round your answer to the
crimeas [40]

Answer:

If the area is 121 cm the answer is 38.99 if its 12 cm then the answer is 12.28

Step-by-step explanation:

Im not sure if correct but i tried

7 0
3 years ago
Which of the following sets of lengths can Sean use to make a right triangle?
Aleks [24]

Answer:

{8 cm, 15 cm, 17 cm}

Step-by-step explanation:

we know that

The length sides of a right triangle must satisfy the Pythagoras Theorem

so

c^2=a^2+b^2

where

c is the greater side (the hypotenuse)

a and b are the legs (perpendicular sides)

<u><em>Verify each case</em></u>

case 1) we have

{5 cm, 15 cm, 18 cm}

substitute in the formula

18^2=5^2+15^2

324=250 ----> is not true

therefore

Sean cannot make a right triangle with this set of lengths

case 2) we have

{6 cm, 12 cm, 16 cm}

substitute in the formula

16^2=8^2+12^2

256=208 ----> is not true

therefore

Sean cannot make a right triangle with this set of lengths

case 3) we have

{5 cm, 13 cm, 15 cm}

substitute in the formula

15^2=5^2+13^2

225=194 ----> is not true

therefore

Sean cannot make a right triangle with this set of lengths

case 4) we have

{8 cm, 15 cm, 17 cm}

substitute in the formula

17^2=8^2+15^2

289=289 ----> is true

therefore

Sean can make a right triangle with this set of lengths

6 0
3 years ago
Please help with solving this problem....!!!
kifflom [539]

Answer:

The Average Temperature for the week is -1°C

Step-by-step explanation:

First to find the average, you have to combine all the numbers

-3-4+0-2+0+3-1 = -7

Then you have to divide the total, with the number of numbers used to combine to make the total

-7 ÷ 7 = -1

The average temperature is -1°C

6 0
3 years ago
Solve 24x+8x-11x= -7-14
kolbaska11 [484]
24x+8x= 32x
32x-11x=21x
21x=-7-14
-7-14=-21
21x=-21
-1
8 0
3 years ago
Read 2 more answers
What is 7.8×10^5 hours in days?
iragen [17]

Answer:

32500 Days

Step-by-step explanation:

7.8 × 10^{5} = 780000

We know that there are 24 hours in a day.

⇒24 Hours = 1 Day

therefore 780000 hours = \frac{780000}{24} = 32500 Days

7 0
3 years ago
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