153 is 90% of what number
2 answers:
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Answer:
The Cost of yellow shirts is $15 and the cost of purple shirt is $ 60
Step-by-step explanation:
Let cost of one yellow shirt be x
and the cost of one purple shirt be y
On Monday
5x + 7y = 165--------------------(1)
On Tuesday
4x + 11y = 213----------------------(2)
To solve (1) and (2)
multiplying eq(1) with 4
20x + 28y = 660--------------------(3)
multiplying eq(2) with 5
20x + 55y = 1056-------------------(4)
Subtracting (3) from (4)
20x + 55y = 1056
20x + 28y = 660
(-)
-----------------------------------
0x +27y = 405
-----------------------------------
y = 15
Substituting y value in eq(1)
5x + 7(15) = 165
5x + 105 =405
5x =405 -105
5x =300
x = \frac{300}{5}
x =60
Answer:
The ratio of the number of boys to the number of girls in the class 1 to 2 or 1/2.
Step-by-step explanation:
Consider the provided information.
Let g is number of girls, and b is number of boys.
The total number of students is b + g.
It is given that, In a certain English class, 1/4 of the number of girls is equal to 1/6 of the total number of students.
Solve the above equation.
Hence, the ratio of the number of boys to the number of girls in the class 1 to 2 or 1/2.