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kolbaska11 [484]
3 years ago
14

Craig writes 3x + 5y - x - 4y = 3 +9y. Can you spot the 2 mistakes he has made?​

Mathematics
2 answers:
fenix001 [56]3 years ago
6 0

Answer:

first 5y-4y does not equal 9y.

second 3x-x is 2x but he put 3.

Step-by-step explanation:

Math - Answered Sun.Sept.19.2021

If It Helped Please Rate And Heart.

sattari [20]3 years ago
4 0

craig forgor how subtraction works

mistake 1: instead of doing 3x - x, he did like multiplication and also forgor about the negative sign and somehow got 3.

mistake 2: instead of doing 5y - 4y, he did 5y + 4y

if he did it right, the answer would be 2x + y

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Fluffy the cat is 3 years older than Scuffy the dog. Six less than five times Scruffy's age is one more than three times Fluffy'
lesya692 [45]

Answer: fluffy is 11 years old

Scuffy is 8 years old

Step-by-step explanation:

Let x represent the present age of Fluffy the cat.

Let y represent the present age of Scuffy the dog.

Fluffy the cat is 3 years older than Scuffy the dog. This means that

x = y + 3 - - - - - -- - - - - 1

Six less than five times Scruffy's age is one more than three times Fluffy's age. This means that

5y - 6 = 3x + 1

5y - 3x = 1 + 6

5y - 3x = 7 - - - - - - - - - -2

Substituting equation 1 into equation 2, it becomes

5y - 3(y + 3) = 7

5y - 3y - 9 = 7

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6 0
3 years ago
a sign says that the price marked on all music equipment is 30% off the original price you buy an electric guitar for sale price
prohojiy [21]

The original price is $450.

<u>Step-by-step explanation:</u>

Step 1:

Given details, Discount%, D% = 30 and Selling Price, SP = $315

Step 2:

Write down formula for calculating the Original Price

Selling Price (SP) = Original Price (OP) - Discount (D)

Discount (D) = Original Price (OP) * (D%/100)

Step 3:

Substitute given values in the formula

315 = OP - D

D = OP \times30/100

D = 0.3 OP

Step 4:

Substitute value of D in the first formula

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4 years ago
Please check screenshot
Hunter-Best [27]

Answer:

Domain: {-2, -1, 0, 1, 2, 3}

Range: {-5, -3, -1, 1, 3, 5}

Step-by-step explanation:

The domain is the set containing all the x-coordinates, and the range is the set containing all the y-coordinates.

Domain: {-2, -1, 0, 1, 2, 3}

Range: {-5, -3, -1, 1, 3, 5}

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