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Veseljchak [2.6K]
3 years ago
6

Perform the indecated operation. 5 over 9 times 3 over 7

Mathematics
2 answers:
kolbaska11 [484]3 years ago
6 0

Answer:

5/63

Step-by-step explanation:

that would be:

 5        3                                        5

----- * ------ = (after reduction)   ----------- = 5/63

 9        7                                      3(21)

Eddi Din [679]3 years ago
3 0

Answer:

\frac{5}{21}

Step-by-step explanation:

\frac{5}{9} × \frac{3}{7} = \frac{15}{63} = \frac{5}{21}

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The ratio of teachers to students on a field trip to New York City is 2 to 9. If there are 243 students on the trip,
Veseljchak [2.6K]

Answer:

54 teachers

Step-by-step explanation:

Step one:

given data

The ratio of teachers to students on a field trip to New York City is 2 to 9.

That is the ratio is 2:9

We are told that there are 243 students

Required

We want to find the number of teachers

Step two:

Applying the part to part method we have

let the number of teachers be x

2/9= x/243

cross multiply we have

9x= 243*2

9x= 486

divide both sides by 9

x= 54

Hence there are 54 teachers

4 0
3 years ago
Which equation can be used to solve for x in the parallelogram below?
densk [106]

Answer:

B. (3x - 12)° = (2x + 8)°

Step-by-step explanation:

This equation can be used to solve x.

3x - 12 = 2x + 8

3x - 2x = 12 + 8

x = 20°

-------------------------------------------------------------------

Verification:

3(20) - 12 = 2(20) + 8

60 - 12 = 40 + 8

48° = 48°

6 0
3 years ago
at the beginning of the day stock cuz opened at $7.25 at the end of the day it closed at $6.88 what is the rate change of stock
Vsevolod [243]
The absolute change is the difference: 6.88 - 7.25 = -0.37

The rate of change is that divided by the originalprice x 100

Ratre of change: (-0.37/7.25 )*100 = -4.93%

4 0
2 years ago
Read 2 more answers
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Mars2501 [29]

Answer:

i believe its a

Step-by-step explanation:

5 0
2 years ago
If (x/100-1)(x/100+1)=kx^2-1 k=
Artist 52 [7]
(x/100-1)(x/100+1)=kx^2-1
(x/100-1)(x/100+1)=(x/100)^2 - 1^2 because it's a difference of squares ( (a-b)(a+b) = a^2-ab+ab-b^2 = a^2 - b^2):
(x/100)^2 - 1^2=kx^2 - 1
(x/100)^2 - 1=kx^2 - 1
(x/100)^2=kx^2
(x^2)/(100^2)=kx^2
1/(100^2)=k
1/10000=k
k=0.0001
3 0
3 years ago
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