Tomas is making trail mix using granola and walnuts. he can spend a total of $12 on the ingredients. he buys 3 pounds of
granola that costs $2.00 per pound. the walnuts cost $6 per pound. he uses the equation 2x+6y=12 to represent the total cost,
where x represents the number of pounds of granola and y represents the number of pounds of walnuts. he solves the
equation for y, the number of pounds of walnuts he can buy.
2x+6y=12
2(3) + 5y = 12
6+by+6=12+6
by = 18
y = 3
which is the first error that tomas made?
tomas substituted the 3 for x when he should have substituted 6 for x.
tomas added 6 to both sides of the equation instead of subtracting 6.
tomas should have written the equation as 3x+6y=12.
tomas substituted 3 for x when he should have substituted 3 for y.

The first error that Tomas made was added 6 to both sides of the equation instead of subtracting 6

Step-by-step explanation:

Let

x > represents the number of pounds of granola

y > represents the number of pounds of walnuts

we know that

The linear equation that represent this scenario is

2x+6y=12 > equation A

x=3 > equation B

substitute equation B in equation A and solve for y

2(3)+6y=12

6+6y=12

Subtract 6 both sides

6+6y-6=12-6

6y=6

Divide by 6 both sides

6y/6=6/6

y=1

so

The number of pounds of walnuts is 1

therefore

The first error that Tomas made was added 6 to both sides of the equation instead of subtracting 6

a. -0.3 > -0.33

complete the steps to find the area of the trapezoid.

area of rectangle = 256   square units

area of triangle 1 = 24  square units

area of triangle 2 = 16  square units

area of triangle 3 =   96 square units

area of trapezoid = 120  square units

step-by-step explanation: