X=Lucy´s money
y=Edy´s money
we can suggest this system of equations:
x=y+(35/100)y ⇒x=135y/100
x+y=206.8
solve by substitution method.
(135y/100)+y=206.8
Least common multiple=100
135y+100y=20680
235y=20680
y=20680/235=88
then:
x=135y/100=135(88)/100=118.8
Answer:
Lucy´s money=$118.8
Edy´s money=$88
To check:
Together, the girls have saved a total of $118.8+$88=$206.8
Lucy´s savings account has: $88+(35/100)$88=$118.8, 35% more monty than Edy´s. account. .
The blue line has a slope of 2 and a y-intercept of +4. Its equation is
y = 2x +4
The shaded area is above the line, so it is the boundary of the inequality
y ≥ 2x + 4
The red dashed line has a slope of -1/3 and a y-intercept of 2. Its equation is
y = -1/3x + 2
The shaded area is above the line, so it is the boundary of the inequality
y > -1/3x + 2
or
x +3y > 6
The graph seems to represent the inequalities
x +3y > 6 and y ≥ 2x +4
The correct answer would be B. 72 degrees
Answer:
B) y = 1/5x + 12/5
Step-by-step explanation:
2 = 1/5(-2) + b
2 = -0.4 + b
2.4 = b
2.4 = 12/5
Boys= n
Girls= 2n +3
n +2 n +3 = 3n+3
24-3= 3n
21= 3n
21/3= n
n=7
There are 7 boys in the class and 17 girls
