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OlgaM077 [116]
3 years ago
7

10% of what number is 43?

Mathematics
1 answer:
Jet001 [13]3 years ago
7 0
Method 1

10%     -  43    |multiply both sides by 10

100%  -   430

Answer: 43 is 10% of 430.

Method 2

10%      -    43
100%    -    x
/cross multiply/

10x = 100·43
10x = 4300    |divide both sides by 10
x = 430

Answer: 43 is 10% of 430.
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Nine times the sum of a number and 2 is 8. Use the variable x for the unknown number
Tems11 [23]
The equation will look like this …9(x + 2)=8
5 0
2 years ago
Lashonda, Pablo, and Hong served a total of 143 orders Monday at the school cafeteria. Pablo served 4 times as many orders as Ho
horsena [70]

Answer:

Hong = 25

Pablo = 100

Lashonda = 18

Step-by-step explanation:

Let Hong's order be x , since Pablo served 4 times as many as Hong , then Pablo's order is 4x , also , since Lashonda served 7 fewer than Hong , it means Lashonda's order is x - 7 . combining all

Hong's orders = x

Pablo's order = 4x

Lashonda's order = x - 7

Total order = 143

Then

x + 4x + x - 7 = 143

6x - 7 = 143

6x = 143 + 7

6x = 150

x = 25

Therefore :

Hong served 25 orders

Pablo served 24x 4 orders = 100 orders

Lashonda served 25 - 7 orders = 18 orders

7 0
3 years ago
2x - 3y = 9; 2x + y = 13
olga2289 [7]

Answer:

See explanations below

Step-by-step explanation:

Given the simultaneous equations;

2x - 3y = 9... 1

2x + y = 13 ... 2

From 2;

y = 13-2x

Substitute into 1;

2x - 3(13-2x) = 9

2x -39 + 6x = 9

8x - 39 = 9

8x = 9+39

8x = 48

x = 6

Since y  = 13-2x

y = 13-2(6)

y = 13-12

y = 1

The soluton to the system of equation is (6, 1)

Given the equations;

99x + 101y = 499; .... 1 * 101

101x + 99 y = 501 ... 2 * 99

______________

9999x + 10,201y = 50,399

9999x + 9801y = 49,599

Subtract

10201y - 9801y = 50399-49599

400y = 800

y = 2

Substitute y = 2 into 1;

From 1;

99x + 101y = 499

99x + 101(2) =499

99x +202 = 499

99x = 499 - 202

99x = 198

x = 198/99

x =2

Hence the solution is (2,2)

For the equations;

49x - 57y = 172 .... * 57

57x - 49y = 252 __ * 49

____________________

2793x -3249y =  9804

2793x - 2401y = 12348

Subtract

-3249y+2401y = 9804-12348

-848y = -2544

y = 3

Substitute into 1;

49x - 57y = 172

49x - 57(3) = 172

49x - 171 = 172

49x = 171+172

49x = 343

x = 7

Hence the solution is (7, 3)

8 0
2 years ago
Please look at the question in the picture it’s a statistics problem
Klio2033 [76]

B is the correct answer

5 0
3 years ago
Which logarithmic equation is equivalent to 3^2 = 9?
noname [10]

Answer:  log_39=2 is the logarithmic equation which is equivalent to3^2=9.


Step-by-step explanation:

According to the laws of logarithms

log_b\ x=n ,where b=base ,n,x all are positive

It can be written in exponential form such as

x=b^n

Now in the given question x=9 ,b=3 and n=2 such that it will equals to

log_39=2

Hence the logarithmic equation for 3^2=9 islog_39=2.

8 0
3 years ago
Read 2 more answers
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