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3 years ago

How can you write 1,270 in expanded form with exponents

Mathematics

2 answers:

miv72 [106K]3 years ago

6 0

1.27 x 10 to the third power

rewona [7]3 years ago

3 0

Answer: $1.10^{3} + 2.10^{2} + 7.10^{1}$

Step-by-step explanation: Expanded form is a way of writing numbers. It is useful because it shows the value of each digit.

In this case, the number is 1270.

It can be rewritten as:

1270 = 1000 + 200 + 70

This is its expanded form. To add exponents, we have to use cientific notation:

1270 = 1.10³ + 2.10² + 7.10¹

This is the expanded form with exponents.

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zepelin [54]

Answer:

Multiply the first equation by 3 and multiply the second equation by -2.

This is justified by the multiplication property of equality

Step-by-step explanation:

we have

$2x+5y=7$ ----> first equation

$3x+4y=6$ ----> second equation

step 1

Multiple the first equation by 3 both sides

$3(2x+5y)=3(7)$ -----> by multiplication property of equality

$6x+15y=21$ ----> new first equation

step 2

Multiple the second equation by -2 both sides

$-2(3x+4y)=-2(6)$ -----> by multiplication property of equality

$-6x-8y=-12$ ----> new second equation

step 3

Solve the system of equations by elimination

Adds new first equation and new second equation

$6x+15y=21\\-6x-8y=-12\\-------\\15y-8y=21-12\\7y=9\\y=\frac{9}{7}$

Find the value of x

substitute the value of y in any equation and solve for x

$6x+15y=21$

$6x+15(\frac{9}{7})=21$

$6x=21-\frac{135}{7}$

$6x=\frac{12}{7}$

$x=\frac{2}{7}$

The solution is the point $(\frac{2}{7},\frac{9}{7})$

therefore

Multiply the first equation by 3 and multiply the second equation by -2.

This is justified by the multiplication property of equality

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EXPLANATION
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