2 +4 +3 = 9 total balls
if they pick a white one first there would be 8 balls left
there are 2 blue ones so probability would be 2/8 which reduces to 1/4
Answer:
The numbers are 20 and - 13
Step-by-step explanation:
Given as ;
The sum of two numbers = 7
Two times a number and three times another number = 13
So ,Let The first number = x
and The second number = y
According to question
x + y = 7 and ...A
2 × x + 3 × y = 1 ....B
Multiply eq A by 2
I.e 2 × ( x + y ) = 2 × 7
Or, 2 × x + 2 × y = 14
Now solve the both equation
( 2 × x + 3 × y ) - ( 2 × x + 2 × y ) = 1 - 14
Or. ( 2 x - 2 x ) + ( 3 y - 2 y ) = - 13
Or, 0 + y = - 13
∴ y = - 13
Put The value of y in eq A
x + y = 7
Or , x = 7 - y
Or, x = 7 - ( - 13 )
so, x = 7 + 13
∴ x =20
Hence The numbers are 20 and - 13 Answer
Answer:
{7, 8, 9, 10}
Step-by-step explanation:
Having worked 4 hours babysitting, Zoé has already earned 4×$7 = $28, so only needs to earn $130 -28 = $102 more.
At $15 per hour, it takes her $102/$15 = 6.8 hours to earn that amount. In order to keep her total hours to a maximum of 14, Zoé cannot work any table-clearing hours more than 14 -4 = 10. The possible solutions for Zoé's hours doing table clearing are ...
{7, 8, 9, 10} . . . . hours
_____
We have assumed Zoé must work whole numbers of hours.
Answer:
Step-by-step explanation:
Let the total amount be x
Then Ali got 1/8x With 7/8x left
Juma got 7/40x with 7/10x left
Musa, Khalid and Mustafa got 7/30x each
since
7x=18000