Answer:
<u>The number of pens = 120 and the number of pencils = 200</u>
Step-by-step explanation:
Let the number of pens x, and the number of pencils is y
the cost of one pen $1, and the cost of one pencil $0.5
The cost of the whole purchase was $220
1 * x + 0.5 * y = 220
x + 0.5 y = 220 ⇒ eq.(1)
there were 80 more pencils than pens
y - x = 80 ⇒ eq.(2)
from eq.(2) x = y - 80
By substitution with x from the last equation at eq.(1)
∴ (y - 80) + 0.5 y = 220
1.5y = 220 + 80 = 300
y = 300/1.5 = 200
x = y - 80 = 200 - 80 = 120
<u>So, the number of pens = 120 and the number of pencils = 200</u>
Answer:
174
Step-by-step explanation:
give brainliest please
Answer:
The area of the triangle is 25 units
Step-by-step explanation:
Answer:
B = G + 7 and B + G = 29
Step-by-step explanation:
Let B = boys and G = girls. There are 7 more boys then girls. Set the equation:
B = G + 7
There are 29 students in total. Set the boys and girls equal to the total amount:
B + G = 29
B = G + 7 and B + G = 29 is your answer.
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3/4 divided by 2 1/2 is 3/10
3/10
