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AnnyKZ [126]
3 years ago
7

Which equation demonstrates the multiplicative identity property?

Mathematics
1 answer:
mart [117]3 years ago
7 0

Answer:

B. (-3+5i)(1)= -3+5i

Step-by-step explanation:

The multiplicative identity property states that any number or polynomial times 1 will be equal to itself. In answer B, a polynomial is multiplied by 1 and then equals itself. None of the other answers have 1 as a term, and therefore cannot be correct.

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Trey mechanic will fix Trey's car at a rate of $20 per hour, plus $400 for the cost of a part. Trey's neighbor already has the n
makvit [3.9K]

Answer:

8 hours.

Step-by-step explanation:

let x represent number of hours.

We have been given that Trey mechanic will fix Trey's car at a rate of $20 per hour, plus $400 for the cost of a part.

So total cost of repairing a car for x hours by Trey mechanic would be 20x+400.

We are also told that the neighbor has the needed part and will fix the car for only $70 per hour. So total cost of repairing a car for x hours by neighbor would be 70x.

To find the number of hours, when the cost of fixing the car by either person will be equal, we need to equate both expressions as:

70x=20x+400

Let us solve for x.

70x-20x=20x-20x+400

50x=400

x=\frac{400}{50}

x=8

Therefore, after 8 hours the cost of having the car fixed by either person will be the same.

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3 years ago
Graph the follow in equation
AURORKA [14]
13 and 2 are numbers you could use in graph☺
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3 years ago
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A map of Texas has a scale of 1 in : 65 mi. The distance from dallas to San Antonio is 260 miles. What is the distance on the ma
riadik2000 [5.3K]

Answer:

We can write this as a proportion equation:

x

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1

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while keeping the equation balanced:

260

mi

×

x

260

mi

=

260

mi

×

1

in

65

mi

260

mi

×

x

260

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=

260

mi

×

1

in

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x

=

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x

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Step-by-step explanation:

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3 years ago
Complete the equation of the line whose slope is 5 and y-intercepts is (0,4)
Nonamiya [84]

Answer:

y=5x+4

Step-by-step explanation:

3 0
3 years ago
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HELLLLP BEST ANSWER GETS BRAINALIST!!!!!
emmasim [6.3K]

36/15 = 8/a

multiply a .. on both sides

a×36/15= 8

multiply 36/15 reciprical on both sides

a= 8 × 15/36

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a= 3.33

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3 years ago
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