(1) let there be x book and let the total cost be y dollars.
y=19.25x+40
y=16x+69.25
(2) 19.25x+40=16x+69.25
3.25x=29.25
x=9
9 silver book, 9 gold book.
(3) y=19.25x+40=19.25*9+40=213.25 dollars
both companies' total cost are 213.25 dollars.
Answer:
line FG
Step-by-step Explanation:
In the diagram, line CD passes through
The slope of this line is found using the formula,
We substitute the values to get,
So line CD is the line with slope
From the graph we can see clearly that, the only line that is perpendicular to CD is line FG.
Line FG also passes through
We can verify that the product of these two slopes is negative 1.
Therefore the correct answer is C
Answer:
1.5 liters
Step-by-step explanation:
there are 1,000 ml in a liter
1500/1000=1.5
so, sophia is drinking 1.5L of water
450= 175+25x
(let x stand for how many hours of lessons dakota can afford)
Step 1: Simplify both sides of the equation.
450=25x+175
Step 2: Flip the equation.
25x+175=450
Step 3: Subtract 175 from both sides.
25x+175−175=450−175
25x=275
Step 4: Divide both sides by 25.
25x25=27525x
x=11
Dakota can afford 11 hours of lessons.
14-5+20÷2∧2+4
exponent first: 14-5+20÷4+4
Divide: 14-5+5+4
Solve left to right: 9+5+4
add all: 14+4 = 18