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Verdich [7]
3 years ago
11

Which value of x makes the equation 1.25(4x+2)=32.5

Mathematics
1 answer:
UkoKoshka [18]3 years ago
8 0

Answer: x=6

Step-by-step explanation:

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2. In a given population of two-earner male-female couples, male earnings have a mean of $40,000 per year and a standard deviati
Kobotan [32]

Answer: $85,000

Step-by-step explanation:

Given : In a given population of two-earner male-female couples, male earnings have a mean of $40,000 per year and a standard deviation of $12,000.

\mu_M=40,000\ \ ;\sigma_M=12,000

Female earnings have a mean of $45,000 per year and a standard deviation of $18,000.

\mu_F=45,000\ \ ;\sigma_F=18,000

If  C denote the combined earnings for a randomly selected couple.

Then, the mean of C will be :-

\mu_c=\mu_M+\mu_F\\\\=40,000+45,000=85,000

Hence, the mean of C = $85,000

8 0
3 years ago
What Is The Sum Of 12 And Its Opposite??<br><br><br>FIRST IS BRAINLEIST AND 5 STATS!<br>​
ahrayia [7]

Answer:

0

Step-by-step explanation:

The opposite of 12 is -12, and 12+(-12)=12-12, or 0.

8 0
3 years ago
Read 2 more answers
A rectangular turtle aquarium is 6 ft long by 4 ft wide. The aquarium is enlarged by increasing
My name is Ann [436]

Answer:

8ft x 6ft

Step-by-step explanation:

For this problem, we want to create measurements of length and width that double our current area.  First we need to find the current area.

C_Length = 6 ft

C_Width = 4 ft

C_Area = C_Length * C_Width

C_Area = 6 ft * 4 ft = 24 ft^2

Now we want our new area to be double the old area.

N_Area = 2C_Area

N_Area = 2 * 24 ft^2

N_Area = 48 ft^2

Now we simply need to find the increase in width and length, distributed equally, that will create the new area.

N_Area = (C_Length + x) * (C_Width + x)

Where x is the amount that each variable is increased by to create the new area.

Now we simply solve for x.

N_Area = (C_Length + x) * (C_Width + x)

48 = (6 + x) * (4 + x)

48 = 24 + 10x + x^2

0 = -24 + 10x + x^2

Now we can either apply the quadratic formula or attempt to factor using the constant break down method.

(x + 12) (x - 2) = 0

x = -12; x = 2

Note that we will choose x = 2 since the other option would require us to have negative material, which is impossible.

Now we can check to validate our answer by plugging in the value of x.

48 ?= (6 + 2) * (4 + 2)

48 ?= (8) * (6)

48 == 48

Thus, we have found the dimensions of the new aquarium, 8ft x 6ft.

Cheers.

6 0
3 years ago
Suppose that y varies inversely with X and that y equals 4 when x equals 6 what is an equation for the inverse variation
nekit [7.7K]
When two functions vary inversely with each other, they are usually in the form y = k / x, where k is the constant of proportionality.

To find the equation for the inverse variation, find the constant of proportionality. Do that by substituting the values for x and y into y = k / x and solving for k.

y = k / x
4 = k / 6
24 = k

Answer:
The constant of proportionality is 24. The equation for the inverse variation is y = 24/x.
3 0
3 years ago
Read 2 more answers
A 100 - sqaure grid has 70 shaded sqaures . Explain how you could express this model as a fraction , percent , and decimal.
tensa zangetsu [6.8K]

Answer:

Would it be 70/100 as a fraction and 0.7 as a decimal and 70% as a percentage?

Step-by-step explanation:

If you have 100 squares and 70 of those squares are shaded, your answer would 70/100.

4 0
3 years ago
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