Leroy invested 12,000 into two different bank accounts. one account (x) gives leroy 1.5% interest yearly and the other account (y) give leroy 3% interest yearly. at the end of one year leroy had earned $300 in interest. which system of equations could be used to solve for how much money leroy invested in the two accounts?

The system of equations is,

Step-by-step explanation:

For first account,

Investment = x,

Annual rate of interest = 1.5 %

Time = 1 year

Thus, the total interest by one account,

Now, for second account,

Investment = y

Annual rate of interest = 1.5%

Time = 1,

Hence, the interest by the second account,

Thus, the total interest,

According to the question,

Now,  total investment = 12000,

⇒ x + y = 12000

Hence, the required system of equations, to solve for how much money Leroy invested in the two accounts is,

,

y=mx+b

step-by-step explanation:

m slope, b y-intercept

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls