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vitfil [10]
2 years ago
14

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

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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:

12

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:

<em><u>14</u></em> 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:

50

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.) <br> 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

So

\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
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