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3 years ago

What is 4n-2n=4 i got lost on that

Mathematics

1 answer:

diamong [38]3 years ago

3 0

Answer:

n = 2

Step-by-step explanation:

4-2 = 2n

$\frac{2n}{4} =2$

4 x 2 = 8

2 x 2 = 4

8 - 4 = 4

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Anna wants to take fitness classes. She compares two gyms to determine which would be the best deal for her. Fit Fast charges a

lutik1710 [3]

The number of classes Anna can take so the total cost for the month will be the same is 5.

The monthly cost would be $37.50.

<h3>When would the total cost be the same?</h3>

When the monthly cost is equal, both equations would be equal: 7.5x = 5.5x + 10

In order to determine the value of x, take the following steps:

Combine similar terms: 7.5x - 5.5x = 10
Add similar terms: 2x = 10
Divide both sides by 2 : 10 /2 = 5

Monthly cost when the cost is the same: 7.5 x 5 = $37.50

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7 0

2 years ago

Cindy and Giovanni plan to make spaghetti sauce. Cindy needs 4 and three-fourths pounds of tomatoes for her recipe. Giovanni nee

Flauer [41]

(4 3/4) + (5 3/4) = (4 + 5) + (3/4 + 3/4)

= 9 + 2×(3/4)

= 9 + 3/2

= 10 1/2 . . . . pounds of tomatoes

7 0

3 years ago

Read 2 more answers

The figure shows the front side of a metal desk in the shape of a trapezoid.

Alenkinab [10]

Answer:

Area of trapezoid is $16ft^2$ .

Therefore, option 2nd is correct.

Step-by-step explanation:

We have been given both the sides a=3 and b=5.

And height that is h=4

We will use the formula find the area of trapezoid is:

$\frac{a+b}{2}\cdot h$

Substitute the formula we get:

$\frac{3+5}{2}\cdot 4$

$\Rightarrow \frac{8}{2}\cdot 4$

$\Rightarrow 16$ .

Area of trapezoid is $16ft^2$ .

Therefore, option 2nd is correct.

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3 years ago

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Find the volume of the wedge-shaped region contained in the cylinder x2 + y2 = 49, bounded above by the plane z = x and below by

fiasKO [112]

$\displaystyle\iiint_R\mathrm dV=\int_{y=-7}^{y=7}\int_{x=-\sqrt{49-y^2}}^{x=0}\int_{z=x}^{z=0}\mathrm dz\,\mathrm dx\,\mathrm dy$

Converting to cylindrical coordinates, the integral is equivalent to

$\displaystyle\iiint_R\mathrm dV=\int_{\theta=\pi/2}^{\theta=3\pi/2}\int_{r=0}^{r=7}\int_{z=r\cos\theta}^{z=0}r\,\mathrm dz\,\mathrm dr\,\mathrm d\theta$
$=\displaystyle\int_{\theta=\pi/2}^{\theta=3\pi/2}\int_{r=0}^{r=7}-r^2\cos\theta\,\mathrm dr\,\mathrm d\theta$
$=-\displaystyle\left(\int_{\theta=\pi/2}^{3\pi/2}\cos\theta\,\mathrm d\theta\right)\left(\int_{r=0}^{r=7}r^2\,\mathrm dr\right)$
$=\dfrac{2\times7^3}3=\dfrac{686}3$

4 0

3 years ago

The unit digit of a two digit number is one less than the ten digit number. If the number is increase by 8 and then divided by t

Colt1911 [192]

The tens digit is 3; the units digit is 3-1 = 2; and the number itself is 32.

<em>Lets simplify the problem,</em>

Let assume the "tens" digit be x

Then the "units" difference = (x-1), according to the condition.

Hence, the number itself is N = 10x + (x-1).

Then the number N+8 is 10x + (x-1) + 8 = 10x + x + 7 = 11x + 7.

From the last statement of the problem, we have this equation

$N+8 = 8*(x+y),or11x + 7 = 8*(x+(x-1)).$

Simplify and find "x"

$11x + 7 = 8*(2x-1)11x + 7 = 16x - 87 + 8 = 16x - 11x15 = 5xx = 15/5 = 3$ .

Thus the tens digit is 3; the units digit is 3-1 = 2; and the number itself is 32.

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6 0

2 years ago