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yaroslaw [1]
3 years ago
11

What is 9 + 10? This is hard homework

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
4 0
9 + 10=21 :)
9=3 x3
10= 2 x 5
3x5=15
3x2=6
15 + 6 = 21 :)
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How to solve this pythagoras theorem
My name is Ann [436]

Answer:

see explanation

Step-by-step explanation:

The hypotenuse is the longest side thus is (4x + 1)

The legs are 2x and (4x - 1)

Using Pythagoras' theorem, then

(4x + 1)² = (2x)² + (4x - 1)² ← expanding factors

16x² + 8x + 1 = 4x²  + 16x² - 8x + 1 , that is

16x² + 8x + 1 = 20x² - 8x + 1 ( subtract 20x² - 8x + 1 from both sides )

- 4x² + 16x = 0 ( multiply through by - 1 )

4x² - 16x = 0 ← factor out 4x from each term

4x(x - 4) = 0

Equate each factor to zero and solve for x

4x = 0 ⇒ x = 0

x - 4 = 0 ⇒ x = 4

Now x > 0, thus x = 4

2x = 2(4) = 8

4x - 1 = 4(4) - 1 = 16 - 1 = 15

4x + 1 = 4(4) + 1 = 16 + 1 = 17

Thus

perimeter = 8 + 15 + 17 = 40 cm

3 0
3 years ago
5 pens for 4.85 what is the unit price
liraira [26]

Answer:

0.97

Step-by-step explanation:

You only have to divide 4.85 by 5 and you will get the unit price.✨ Trust me I get it right!

5 0
3 years ago
1∕2x – 2y + 2z –3z + 3∕4x – y
kogti [31]

Answer:

x-3y-z

Step-by-step explanation:

separate common terms and add them

1/2x+3/4x=1x

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1x-3y-1z

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Please answer quickly thanks
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What makes you unique
IRINA_888 [86]
Your personality and your characteristics.
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2 years ago
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