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frozen [14]
3 years ago
12

What is the value of x in the equation 4x 8y = 40, when y = 0.8?4.68.41012

Mathematics
1 answer:
Ksju [112]3 years ago
3 0
If you make 8 times 0.8 (because there is 8y so that means is there is eight 0.8), 8 times 0.8 is 6.4. so 40 minus 6.4 equals to 33.6. so there is 4x. 33.6 divide 4 is 8.4. 

x = 8.4
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The population of a city in 2005 was 18,000. By 2010, the city’s population had grown to 45,000. Economists have determined that
tensa zangetsu [6.8K]
2005= 18,000
2010= 45,000


1) make 2005 year "0", and 2010 year "5"
2)in order to solve this problem and figure out the rate of change, we must use the equation for exponential functions y=ab^x
3) a= the y- value of y intercept ( what does y equal when x is zero) in this case a population number so, a= 18,000; b= the unknown rate of change; x= time and since we're finding  b we can plug in 5 for the time in years; y= the value of y in terms of the x-value, so when x is 5, y is 45,000
4) you end up with something like this
45,000= 18,000b^5
5) in order to proceed to solve you must get b alone
6) divide both sides by 18,000
7) so you no have 2.5= b^5
8) take the fifth root of both sides 
9) now you have your answer b=<span>1.20112443398</span>
6 0
3 years ago
Read 2 more answers
Jasmine tossed a coin 20 times. It lands on heads 14 times and tails 6 times. What is the relative frequency of landing on tails
Snowcat [4.5K]

Answer:

The relative frequency of landing on tails is 0.3.

Step-by-step explanation:

The relative frequency of an outcome A is:

The number of trials in which the outcome A happened divided by the total number of trials.

In this problem, we have that:

20 coin tosses, so 20 trials. On 6, it landed on tails.

6/20 = 0.3

This means that the relative frequency of landing on tails is 0.3.

4 0
3 years ago
I WILL GIVE YOU A CROWN JUST NEED HELP
erma4kov [3.2K]

Answer:

white flour: 4/8 = 1/2

wheat flour: 3/8

Step-by-step explanation:

7 0
3 years ago
8t-r=12t , solve for t
WITCHER [35]
<span>8t-r=12t
Add r to both sides
8t=12t+r
Subtract 12t from both sides so that t can only be on one side
-4t=r
Divide both sides by -4
Final Answer: t= r/-4</span>
6 0
3 years ago
Consider the equation and its solution.
AVprozaik [17]

Answer:

The correct answer is C. 2.

Step-by-step explanation:

To solve this problem, we should begin with the second step and work backwards in order to find the unknown value.  If given the equation -15x + 30 = 25, we should factor out a -15 to simplify.  This method is shown below.

-15x + 30 = 25

-15(x-2) = 25

We know this is correct because if we redistribute the -15 through the parentheses using the distributive property, we would get our original equation again.  In other words, this answer is confirmed by the fact that -15 * -2 equals positive 30.

However, we need to look closely at the question that is asked.  The box that we must fill in is already preceded by a negative sign, thus the correct answer is C. 2.

We can check our work by replacing the box with the number 2, getting -15(x-2) + 30 = 25, which was the equation we got earlier.

Hope this helps!

5 0
3 years ago
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