4 years ago

Two cans of paint and 1 brush cost $37. Four cans of paint and 3 brushes cost $81. Find the cost of one can of paint.

1 answer:

8 0

2c + b = 37 ....multiply by -3
4c + 3b = 81
------------------
-6c - 3b = - 111 (result of multiplying by -3)
4c + 3b = 81
------------------add
-2c = - 30
c = -30/-2
c = 15 <== $ 15 for a can of paint

and it costs $ 7 for each brush

You might be interested in

Classify a triangle with vertices A(1, 1), B(4, 7), and C(7, 1) as one of the following.

mash [69]

B. Isosceles. that is the correct answer

3 0

3 years ago

What is the equation of this function after it is reflected over the x-axis?

erma4kov [3.2K]

Answer: F(x)=-(x+4)^3

That's it

5 0

3 years ago

12 students in drama club want to go on a field trip to watch a Broadway musical in NYC. The ticket price is $45 for each studen

Karo-lina-s [1.5K]

Answer:

43 cars

Step-by-step explanation:

5 0

3 years ago

X/-2=4, X/3+13=13, Z/2+2=4 plz show ur work and explain how u did it

AVprozaik [17]

$\dfrac{x}{-2}=4\ \ \ |multiply\ both\ sides\ by\ (-2)\\\\(-2)\cdot\dfrac{x}{-2}=(-2)\cdot4\\\\\boxed{x=-8}\\\\\dfrac{x}{3}+13=13\ \ \ |subtract\ 13\ from\ both\ sides\\\\\dfrac{x}{3}+13-13=13-13\\\\\dfrac{x}{3}=0\ \ \ |multpily\ both\ sides\ by\ 3\\\\\not3^1\cdot\dfrac{x}{\not3_1}=0\\\\\boxed{x=0}$

$\dfrac{z}{2}+2=4\ \ \ |subtract\ 2\ from\ both\ sides\\\\\dfrac{z}{2}+2-2=4-2\\\\\dfrac{z}{2}=2\ \ \ \ |multiply\ both\ sides\ by\ 2\\\\\not2^1\cdot\dfrac{z}{\not2_1}=2\cdot2\\\\\boxed{z=4}$

6 0

3 years ago

the sum of three consecutive numbers is five times the difference of the middle number and 22. find the numbers.

adelina 88 [10]

Let n be the smallest of the three numbers. Then

n + (n + 1) + (n + 2) = 5 ((n + 1) - 22)

Solve for n :

3n + 3 = 5 (n - 21)

3n + 3 = 5n - 105

2n = 108

n = 54

Then the three numbers are 54, 55, and 56.

5 0

3 years ago