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Reil [10]
3 years ago
11

The difference of two numbers is five. Five times the lesser number minus the greater number is -9. What are the two numbers?

Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
5 0

Answer:

Its math

Step-by-step explanation:

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Factorise 9 X square + Y square + Z square - 6 X Y + 2 Y Z - 6 x z hence find its value when X is equals to 1 by equal to 2 and
Assoli18 [71]

a) Factor 9x² + y² + z² - 6xy + 2yz - 6xz

This looks a lot like

(x+y+z)² = x² + y² + z²+ 2xy + 2yz + 2xz

except instead of x there's (-3x).   So this must be

(-3x+y+z)² = (-3x)² + y² + z² + 2((-3x)y + (-3x)z + yz)

= 9x² + y² + z² - 6xy + 2yz - 6xz

Looks good.

Answer: (-3x+y+z)²

Since it's a square we could also negate the inside and write this (3x-y-z)²

b) I'll guess that says we want to evaluate this when x=1, y=2, z= -1

(-3(1) + 2 -1)² = (-2)² = 4

Answer: 4

8 0
4 years ago
Please I BEG you to help...
g100num [7]
Answer:

36x^8

Explanation:

Use the rules of exponents
6 0
3 years ago
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r-ruslan [8.4K]

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4 0
3 years ago
△XYZ maps to △MNO with the transformation (x, y) ---> (5x, 5y).
jeyben [28]

Answer:

The length of MN is 30.

Step-by-step explanation:

It is given that △XYZ maps to △MNO with the transformation

(x,y)\rightarrow (5x,5y)

This rule of transformation represents the dilation with scale factor 5 because the dilation about the origin is defined as

(x,y)\rightarrow (kx,ky)

where, k is scale factor.

In dilation, the image and preimage are similar and scale factor is the ratio of corresponding side of image and preimage.

In △XYZ and △MNO,

k=\frac{MN}{XY}

5=\frac{MN}{6}

Multiply both sides by 6.

30=MN

Therefore the length of MN is 30.

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4 years ago
Which system of equations has no solutions?
den301095 [7]

Answer:

The answer is simple it would be the 3rd one(2nd row to the left)

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