How do you solve number 7 please help

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Answer 1

Answer:

Answer: I am pretty sure your answer is 208 cm. Whenever you see a percentage immediately change it to a decimal like in this case 0.070 and multiply it by 400. 400x0.070 is equal to 280. Hope this helps :)

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Which number has the same value as 20 tens

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200 has the same value as 20 tens

Find the distance, to the nearest tenth, from T(4,-2) to U(-2,3).

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Answer:

7.81

Step-by-step explanation:

Using the formula for finding the distance between two points as shown:

TU = √(y2-y1)²+(x2-x1)²

Given T = (4,-2) and U = (-2,3)

x1 =4, y1 = -2, x2 = -2, y2 = 3

Substituting this values into the formula, we have;

TU = √{3-(-2)}²+(-2-4)²

TU = √(3+2)²+(-2-4)²

TU = √5²+(-6)²

TU = √25+36

TU = √61

TU = 7.81

The distance between the two points is 7.81

$d = \sqrt{ (x_(1) - x_(2))^(2) + (y_(1) - y_(2))^(2) } \n d = \sqrt{ (4 - (-2))^(2) + (-2 - 3)^(2) } \n d = \sqrt{ (6)^(2) + (-5)^(2) } \n d = √( 36 + 25) \n d = √( 61 ) \n d = 7.81024... \n d = 7.8$

Must the difference between 2 rational numbers be a rational number?

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Yes. The difference between 2 rational numbers must be a rational number.

The first rational number can always be written as a fraction of integers.
Let's call it   A/B .

The second rational number can always be written as a fraction of integers.
Let's call that one C/D .

   Their difference is A/B - C/D .

   'BD' is a common denominator.

   A/B = AD/BD

   C/D = CB/BD

   A/B - C/D = AD/BD - CB/BD =

      (AD - CB) / BD

Each term in that ugly thing /\ is a product of integers,
so it must be must be another integer.

Therefore the whole ugly fraction is another rational number.

a/b - c/d with a,b,c,d as integers and b,d ≠ 0. a/b - c/d -> ad/bd - bc/bd --> (ad - bc)/bd
The difference will always be rational. This is because the denominator will never be 0. Everything is closed under some kind of operation, and the answers will always be able to be written as a ratio.
Hope that helped.

The voltage in an electrical circuit is multiplied by itself each time it is reduced. The voltage is 27/125 of a volt and it has been reduced three times. Write the voltage in exponential form. What was the original voltage in the circuit?

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Exponential form: F(x)= 3/125^x+1
Original voltage: 3/125 of a volt

Please help i don't understand

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3n/2 should be multiplied by 5 instead of two since 2 x 2 does not equal 10

Which of the following equations does not represent a true statement A. -6(-3) = 18
B. -6 + (-3) = -9
C. -6 - (-3) = 3
D. -6 ÷ (-3) = 2

Answers

Answer:

C. -6 - (-3) = 3

Step-by-step explanation:

An equation requires the both sides right and left to remain equal every time. In the following equation all the equations are balanced except C because that have difference value on both sides. It should be equal.

A. -6(-3) = 18

-6(-3) = 18

18 = 18

B. -6 + (-3) = -9

-6 + (-3) = -9

-9 = -9

C. -6 - (-3) = 3

-6 - (-3) = 3

-9 = 3

D. -6 ÷ (-3) = 2

-6 ÷ (-3) = 2

2 = 2