Exponential function

Mathematics

1 answer:

igomit [66]3 years ago

7 0

Answer:

an exponent is the little number next to a number. it shows how many numbers of that number there are. sry thats confusing. so $3^{3}$ means 3 x 3 x 3, not the same as 3 x 3. another example: $5^{4}$ is the same as 5 x 5 x 5 x 5.

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3 0

3 years ago

2(5x-7)=2x+10 what Is the distributive property

professor190 [17]

2(5x)2(-7)=2x+10

2(5x)= 10x
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10x-14=2x+10

Solve:
10x-2x=8x

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3 years ago

Write a system of equations to describe the situation below, solve using elimination.

Sedbober [7]

Answer:

The cost of hardbook is $9 and cost of paperback is $5.

Step-by-step explanation:

Let x be the price for hardback book and y be the price for paperback book.

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We can write the equation as:

$42x + 64y = 698$

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We can write the equation as:

$42x + 58y = 668$

We have to use the elimination method to solve the two equations.

We eliminate x by subtracting the two equations.

$42x + 64y-(42x + 58y) = 698 - 668\\\Rightarrow 6y = 30\\\Rightarrow y = 5\\42x + 64(5) = 698\\\\\Rightarrow x = \displaystyle\frac{698 - 64(5)}{42}\\\\\Rightarrow x = 9$