Answer:
The first one
Step-by-step explanation:
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Answer:
Step-by-step explanation:
For this exercise it is important to remember the multiplication of signs:

In this case, given the following expression:

You can idenfity that both factors are negative. Then, the product (The result of the multiplication) will be positive.
Then, in order to get the product, you need to multiply the numerator of the fraction by -8. So, you get:

You can notice that the numerator and the denominator of the fraction obtained cannot be divided by the same number; therefore, the fraction cannot be simplified.
Answer:
k=4
Step-by-step explanation:
-The constant of proportionality is defined as the ratio between two directly proportional variables.
-Given that B=4f
#The constant of proportionality is calculated as:
- the equation can be written in the form y=kx,
where y varies directly with x and k is the constant of variation:

Hence, B varies directly with f with a constant of proportionality k=4
Answer:
D=
Step-by-step explanation:
Here we are required to find the distance between two coordinates. We will use the distance formula to find the distance
The distance formula is given as

Here we are given two coordinates as

Substituting these values in the Distance formula given above we get



Hence this is our answer
Answer 70 = 7070
Step-by-step explanation: denotes how many times to multiply the base (70)