All categories

3 years ago

Solve x= 12x + 15. Do not include extraneous solutions.

Mathematics

2 answers:

slava [35]3 years ago

8 0

Answer:

x=15/-11

Step-by-step explanation:

x=12x+15

-12x -12x

-11x=15

x=15/-11

ozzi3 years ago

4 0

Answer:

$x = 12x + 15 \\ 12x - x = - 15 \\ \\ 11x = - 15 \\ x = - \frac{15}{11}$

You might be interested in

The cost of turkey is directly proportional to its weight. If a 12-pount turkey costs $27, how much does a 13-pound turkey cost?

Pavel [41]

Answer:

$29.25

Step-by-step explanation:

Divide the cost of the turkey by 12 to obtain the unit cost then multiply this by 13

cost = $\frac{27}{12}$ × 13 = $29.25

6 0

3 years ago

Read 2 more answers

The vertices of ABC are A(-2, 2), B(6,2), and CO, 8). The perimeter of ABC?

Alexxx [7]

Answer:

Perimeter = 22.809836694575

Step-by-step explanation:

A(-2, 2) ; B(6,2) ; C(0, 8)

$AB=\sqrt{\left( 6--2\right)^{2} +\left(2-2 \right)^{2} } =\sqrt{64} =8$

$AC=\sqrt{\left( 0--2\right)^{2} +\left(8-2 \right)^{2} } =\sqrt{40} =2\sqrt{10}$

$BC=\sqrt{\left( 0-6\right)^{2} +\left(8-2 \right)^{2} } =\sqrt{72} =6\sqrt{2}$

Then

The perimeter of ΔABC = AB + BC + AC

$=8+6\sqrt{2} +2\sqrt{10}$

= 22.809836694575

3 0

2 years ago

3x - 3(x+1) - 3<br> Solution for x

sertanlavr [38]

Answer:

-6

Step-by-step explanation:

3x-3(x+1)-3

3x-3x-3-3

-3-3

-6

7 0

3 years ago

Find dy du , du dx , and dy dx .

dangina [55]

Answer:

a) $\frac{dy}{du}=5(x^2 +1)^4$ , $\frac{du}{dx}=2x$ , $\frac{dy}{dx}=10x(x^2+1)^4$

b) $\frac{dy}{du}=4(4x^2-x+6)^3$ , $\frac{du}{dx}=8x-1$ , $\frac{dy}{dx}=4(8x-1)(4x^2-2+6)^3$

Step-by-step explanation:

We can use the chain rule in the following form: is u=u(x) is a differentiable function depending on x and y=y(u) is a differentiable function depending on u, then $\frac{dy}{dx}=\frac{dy}{du} \frac{du}{dx}$ .

a) $\frac{dy}{du}=\frac{d}{du} (u^5)=5u^4=5(x^2 +1)^4$ from the power rule.

$\frac{du}{dx}=\frac{d}{dx} (x^2 +1)=2x$ .

From the previous parts and the chain rule, $\frac{dy}{dx}=\frac{dy}{du} \frac{du}{dx}=5(x^2 +1)^4(2x)=10x(x^2+1)^4$

b) $\frac{dy}{du}=\frac{d}{du} (u^4)=4u^3=4(4x^2-x+6)^3$

$\frac{du}{dx}=\frac{d}{dx} (4x^2-x+6)=8x-1$ from the power and sum rules.

Then, $\frac{dy}{dx}=\frac{dy}{du} \frac{du}{dx}=4(4x^2 -x+6)^3(8x-1)=4(8x-1)(4x^2-x+6)^3$

8 0

3 years ago

What is the easiest way to find the answer?

amid [387]

multiply the number of ounces by the price per ounce

Blue jelly beans cost 0.28 per ounce and there are 4 ounces

4 * 0.28 = 1.12

red jelly beans cost 0.55 per ounce and there is 3 ounces

3 *0.55 = 1.65

now add the totals: 1.12 +1.65 = 2.77

this is more than the total they want of 2.20

so it is not reasonable.

3 0

3 years ago