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3 years ago

10

The local grocery store sells a bag of dog food for $22. The store pays $13 for the dog food which equation can be used to find

the markup on the dog food?

1 answer:

iogann1982 [59]3 years ago

8 0

Answer:

2

Step-by-step explanation:

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anyanavicka [17]

Answer:

The answer is is the middle answer! a= (d - c)

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b

Step-by-step explanation:

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faust18 [17]

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3 years ago

Find the positive base $b$ in which the equation $5_b \cdot 23_b = 151_b$ is valid.

DanielleElmas [232]

Answer:

b=7

Step-by-step explanation:

We want to determine the positive base b in which:

$5_b \cdot 23_b = 151_b$

The easiest way to approach this is to convert all the numbers to base 10.

$5_b=5Xb^0=5\\23_b =(2Xb^1)+(3Xb^0)=2b+3\\151_b=(1Xb^2)+(5Xb^1)+(1Xb^0)=b^2+5b+1\\Therefore:\\5_b \cdot 23_b = 151_b\\5(2b+3)=b^2+5b+1\\10b+15=b^2+5b+1\\b^2+5b+1-10b-15=0$

$b^2-5b-14=0$

Next, we factorize the resulting expression.

$b^2-5b-14=b^2-7b+2b-14=0\\b(b-7)+2(b-7)=0\\(b-7)(b+2)=0\\b-7=0\: or \: b+2=0\\b=7\: or \: b=-2$

The positive value of b for which the equality hold is 7.

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3 years ago

Drag an expression to the box to create an equation with no solutions.

Anon25 [30]

Answer:

C

Step-by-step explanation:

4x + 3 = x + 3x + 5

4x + 3 = 4x + 5 //-4x on both sides

3 = 5 //Since the statement is false, it's no solution.

If, it had 3 = 3 or any number n = n, the solution would be infinite. But, if x is equal to any number n, x=n, it would have only one solution.

//Hope it helps

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3 years ago

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NikAS [45]

Answer:

6 units

Step-by-step explanation:

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