All categories

2 years ago

Help me please I have an hour left

Mathematics

1 answer:

Sholpan [36]2 years ago

6 0

Answer:

x = 10

Step-by-step explanation:

If the horizontal lines are parallel, the intersecting line segments are proportionate

(5x - 2) / (6x + 6) = 40 / 55

55(5x - 2) = 40(6x + 6)

275x - 110 = 240x + 240

35x = 350

x = 10

You might be interested in

I think of a number multiply it by 3 and subtract 4 i get 32 what was the number help pleaseeee

love history [14]

Answer:

Step-by-step explanation:

3 x 12 = 36

36 - 4 = 32

8 0

2 years ago

Read 2 more answers

What is the largest integer that can be divided into 14, 28 and 42?

Murljashka [212]

Answer:

14 is the largest integer that can be divided into 14, 28 and 42.

Step-by-step explanation:

$14 \times 1 = 14 \\ 14 \times 2 = 28 \\ 14 \times 3 = 42$

5 0

2 years ago

Kelly answered 3 items on a test incorrectly. This was 6% of the items. How many items were on the test?

alukav5142 [94]

Answer:

Step-by-step explanation:

6/100=3/y

Let y be the total number of items on the test

[cross multiply]

6×y =3×100

6y = 300

divide both sides by 6

y = 50

3 0

2 years ago

How do you find surface area? If you can explain it that would be great :) thank you!

zepelin [54]

Answer:

SA=2lw+2lh+2hw

Step-by-step explanation:

Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.

3 0

2 years ago

Find the indefinite integral. (Use C for the constant of integration.) e2x 25 e4x dx.

Sladkaya [172]

Answer:

The solution is $\frac{1}{10} * tan^{-1}[\frac{e^{2x}}{5} ] + C$

Step-by-step explanation:

From the question

The function given is $f(x) = \frac{e^{2x}}{ 25 + e^{4x}} dx$

The indefinite integral is mathematically represented as

$\int\limits {\frac{e^{2x}}{ 25 + e^{4x}}} \, dx$

Now let $e^{2x} = u$

=> $\frac{du}{dx} 2e^{2x}$

=> $2 e^{2x}dx = du$

$\int\limits {\frac{e^{2x}}{ 25 + e^{4x}}} \, dx = \int\limits {\frac{1}{ 2(25 + u^2)} } \, du$

$= \frac{1}{2} \int\limits {\frac{1}{ 25 + u^2)} } \, du$

$= \frac{1}{2} \int\limits {\frac{1}{ 5^2 + u^2)} } \, du$

$= \frac{1}{2} \frac{tan^{-1} [\frac{u}{5} ]}{5} + C$

Now substituting for u

$\frac{1}{10} * tan^{-1}[\frac{e^{2x}}{5} ] + C$

3 0

3 years ago