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ser-zykov [4K]
3 years ago
5

What is 3/4 of 100kg

Mathematics
1 answer:
hichkok12 [17]3 years ago
4 0
75kg should be the answer
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What is 7P4<br><br><br><br> A: 28<br><br> B: 35<br><br> C: 210<br><br> D: 840
Semmy [17]

Answer:

D

Step-by-step explanation:

using the definition of nP_{r} = \frac{n!}{(n-r)!}

where n! = n(n- 1)(n - 2)......× 3 × 2 × 1

here n = 7 and r = 4, hence

7P_{4}

= \frac{7!}{3!}

= \frac{7(6)(5)(4)(3)(2)(1)}{3(2)(1)} ← cancel 3 × 2 × 1 leaving

7P_{4} = 7 × 6 × 5 × 4 = 840 → D


4 0
3 years ago
Read 2 more answers
The sum of four times a number and five times another number is -28. The sum of nine times the first number and two times the se
dedylja [7]

Answer:

  -8

Step-by-step explanation:

If we let x and y represent the first and second numbers, respectively, we can write the problem statement as the equations ...

  • 4x +5y = -28
  • 9x +2y = 11

We can multiply the first equation by -9 and add 4 times the second equation to get an equation in y alone:

  -9(4x +5y) +4(9x +2y) = -9(-28) +4(11)

  -37y = 296 . . . . . simplify

  296/-37 = y = -8 . . . . . divide by the coefficient of y

The second number is -8.

7 0
3 years ago
Dana walks 3/5 mile in 1/4 hour. What is dana's walking rate in miles per hour?
Flura [38]
Here, our equation is 3/5 (0.6) mile per 1/4 (0.25) hour.  0.25 times 4 = 1, so we have to multiply 1/4 (0.25) 4 times to get 1 mile. To get a proportional answer, we must also multiply 3/5 (0.6) by 4. This comes out to 2.4. So her walking rate is 2.4 miles per hour.


8 0
3 years ago
north high school has 5,000 students. south high school has 1/10 as many students as North high school. how many students are th
olga2289 [7]
5000(1/10)=500 students
6 0
3 years ago
Read 2 more answers
Pls help!!!!!!!!!!!!!!!!!
vazorg [7]

Answer:

19 for each one

Step-by-step explanation:

Divide 57 by 3

3 0
3 years ago
Read 2 more answers
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