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netineya [11]
3 years ago
12

Need help / do fast please

Mathematics
2 answers:
Fantom [35]3 years ago
4 0

Answer:

19.4

Step-by-step explanation:

{b}^{2}  +  {35}^{2}  =  {40}^{2}  \\  {b}^{2}  =  {40}^{2}  -  {35}^{2}  \\  {b }^{2}  = 375 \\ b =  \sqrt{375}  \\ b = 19.36

Gennadij [26K]3 years ago
4 0

Answer:

The answer to your question is 19.4

Step-by-step explanation:

Data

Right triangle

hypotenuse = 40

adjacent side = b

opposite side = 35

Process

1.- To solve this problem use the Pythagorean theorem

                         c² = a² + b²

- Substitution

                         40² = 35² + b²

- Solve for b²

                            b² = 40² - 35²

                            b² = 1600 - 1225

                            b² = 375

- Result

                            b² = 19.36 ≈ 19.4

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DochEvi [55]

Answer:

one tin of cheese $23

one tin of caramel $27

Step-by-step explanation:

let 'x' = cost of cheese tin

let 'y' = cost of caramel tin

10x + 8y = 446

22x + 11y = 803

i multiplied the first equation by -11 and the second by 8 to eliminate the 'y' terms

  -110x - 88y = -4906

+  <u>176x + 88y = 6424</u>

    66x = 1518

     x = 1518 / 66

     x = 23

find 'y':  10(23) + 8y = 446

             230 + 8y = 446

              8y = 216

               y = 27

3 0
3 years ago
I attached an image. someone help me asap. i'm not the smartest person so i cont understand it :(
vampirchik [111]

Answer:

for the second column it is 12.5

for the third column it is 20%

for the fourth column it is 120%

for the fifth column it is 33%

for the sixth column it is 11.35

for the seventh column it is 900

for the 8th column it is 60%

for the final column it's 39

Step-by-step explanation:

7 0
3 years ago
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Can you help me solve this please​
Lostsunrise [7]

9514 1404 393

Answer:

  180 days

Step-by-step explanation:

The formulas for the volume of a cone and a cylinder are ...

  V = πr²h . . . . . volume of a cone

  V = (1/3)πr²h . . . . . volume of a cylinder

Comparing these formulas, you can see that the 6' high cone at the top will have the same volume as a cylinder of the same radius that is 2' high. So, we can simplify the problem to finding the volume of a cylinder that is 66+2 = 68' high.

  V = π(12 ft)²(68 ft) = 9792π ft³ ≈ 30752.5 ft³

When the corn is used at the rate of 170 ft³/day, it will last ...

  (30752.5 ft³)/(170 ft³/day) ≈ 180.96 days

The corn will last 180 days.

_____

<em>Additional comment</em>

In scenarios like this, it is inappropriate to round up. There will be about 162 ft³ of corn left after 180 days, which is not enough for an additional day.

7 0
3 years ago
5x - 18
Kobotan [32]
Make sure to simplify
6 0
3 years ago
4-3x2 + x2 + 5x – 7)
kompoz [17]

Answer:

7x - 9

Step-by-step explanation:

1: Multiply the numbers

4 - 3 x 2 + 2x + 5x - 7

4 - 6 + 2x + 5x - 7

2: Add the numbers

4 - 6 + 2x + 5x - 7

-9 + 2x + 5x

3: Combine like terms

-9 + 2x + 5x

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4: Rearange terms

-9 + 7x

7x - 9

Solution

7x - 9

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