Does anyone know how to do
donna's coffee shop makes a blend that is a mixture of two types of coffee. type a coffee costs donna $4.20 per pound, and type b coffee costs $5.30 per pound. this month, donna made 145 pounds of the blend, for a total cost of $659.90. how many pounds of type b coffee did she use?

She used 49 of type B

Step-by-step explanation:

Step-by-step explanation:

Same steps, different problem.

x - pounds of type A coffee for current month

y - pounds of type B coffee for current month

x+y=145

4.2x+5.3y=659.9

x+y=145 -> multiply both sides by 4.2

4.2x+5.3y=659.9

4.2x+4.2y=609

1.1y=50.9

21.4 i did it already for s1

step-by-step explanation:

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3