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shusha [124]
3 years ago
5

Please help me faster if know please?!!!!

Mathematics
1 answer:
nekit [7.7K]3 years ago
3 0
.83

25 bus riding sophomores / 30 sophomores
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Please help me with all three! 25 Points!!
Gnoma [55]

a. 28 * 63

28 (60) + 28 (3) or 20 (60) +20 (3) + 8 (60) + 8 (3)

1680 + 84=1764     1200 / 60 +480 +24=1764


b. 17(59)

17 (50) + 17 (9)   or  10 (50) + 10 (9) + 7 (50) +7 (3)

850 + 153=1003         500 + 90 + 63 =1003


c.458 (15)

458 (10) +458 (5)   or  10 (400) + 10 (50) + 10 (8) + 5 (400) +5 (50) + 5 (8)

4580 +2290 = 6870       400 + 500 + 80 + 2000 + 250 + 40 = 6870

My work is kinda confusing but hope it helped

8 0
3 years ago
The 2 main support rods for a barbeque grill are each 7.5 cm from the centre of the
sukhopar [10]

Answer:

  58.1 cm

Step-by-step explanation:

The length of each support rod can be found using the Pythagorean theorem. The geometry can be modeled by a right triangle, such that the distance from centre is one leg and half the length of the rod is the other leg of a triangle with hypotenuse equal to the radius of the grill.

__

<h3>Pythagorean theorem</h3>

The theorem tells us that the sum of the squares of the legs of a right triangle is the square of the hypotenuse. For legs a, b and hypotenuse c, this is ...

  c² = a² +b²

<h3>application</h3>

For the geometry of the grill, we can define a=7.5 and c=30. Then b will be half the length of the support rod.

  30² = 7.5 +b²

  b² = 900 -56.25 = 843.75

  b = √843.75 ≈ 29.0473

The length of each support rod is twice this value, so ...

  rod length = 2b = 2(29.0473) = 58.0947

Each support rod is about 58.1 cm long.

7 0
2 years ago
Describe the connections between unit rates, proportions, and rate tables.
Bas_tet [7]
They're all used for differentiating types of measurement in mathematics and science.
5 0
3 years ago
Read 2 more answers
Two show your work questions
Svet_ta [14]

Answer:

x = 1; y = 1; z = 0

Step-by-step explanation:

First problem:

First equation minus second equation: 3y + 2z = 3      Eq. A

Second equation plus third equation: 2y + 4z = 2        Eq. B

-2 times Eq. A plus Eq. B: -4y = -4

y = 1

Substitute y = 1 in Eq. A: 3 + 2z = 3

2z = 0

z = 0

Substitute z = 0 and y = 1 in original first equation:

-2x + 2 + 0 = 0

-2x = -2

x = 1

Answer: x = 1; y = 1; z = 0



5 0
3 years ago
A number increased by 6 and the result divided by 3 is 21. what is the number?​
kogti [31]

Answer:

Step-by-step explanation:

let the number be x

(x+6)/3   =21

x+6=21*3

x+6=63

x=57

7 0
2 years ago
Read 2 more answers
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