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3 years ago

A man buys a backpack from a sporting goods

Mathematics

1 answer:

Lelechka [254]3 years ago

8 0

Answer:

He would pay a total of $21.50

Step-by-step explanation:

A trick that I learned is to take the zeros and decimals off. Then multiply. Ex) 75 × 2 =150. Take away the zero (15) and ad the decimal (1.5)

I'm not the best at explaining but I hope this helps

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Sergio039 [100]

Answer: 11.

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

What do you notice? Why did does this happen

tiny-mole [99]

Answer:

The thing you should notice is that when we multiply a number by 10^n

(where n is the number of zeros that the number has) we move the decimal point on the first number n times to the right.

For example, if we have the number:

7.231 and we multiply it by 100 (there are 2 zeros) then the decimal point is moved two times to the right:

7.231*100 = 723.1

This happens because the base of our math is 10 (the decimal system).

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3 years ago

Tyler makes a sign that is 79 yard long and 23 yard wide. What is the area of his sign in square yards?

Hitman42 [59]

Answer:

$A=1817\ \text{yards}^2$

Step-by-step explanation:

Given that,

The length of sign, l = 79 yard

Width, b = 23 yards

We need to find the area of his sign. It is in the form of a rectangle. The area of a rectangular shape is given by :

$A=l\times b\\\\A=79\times 23\\\\A=1817\ \text{yards}^2$

So, the area of his sign is $1817\ \text{yards}^2$ .

3 0

3 years ago

Suppose y varies inversely with x, and y = -1 when x = 6. What inverse variation equation relates x and y?

snow_tiger [21]

Answer:

$\displaystyle \text{d. }y=\frac{-6}{x}$

Step-by-step explanation:

If two values $x$ and $y$ are inversely proportional, their product is <em>always</em> some maintained constant (the product of $x$ and $y$ is always maintained). This way, if one goes up, the other must go down by the same extent. By definition, this represents an inversely proportional relationship.

Therefore, we can simply find this constant by multiplying the given values of $x$ and $y$ :

$xy=k,\\6\cdot (-1)=-6$

The constant $-6$ must be maintained as the product of $x$ and $y$ for all values of $x$ and $y$ for them to be inversely proportional. Thus, we have the equation: