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arsen [322]
3 years ago
9

A store manager wishes to reduce the price on her fresh ground coffee by mixing two grades. If she has 35 pounds of coffee which

sells for $2.40 per pound, how much coffee worth $1.80 per pound must she mix with it so that she can sell the final mixture for $2.10 per pound?
Mathematics
2 answers:
kari74 [83]3 years ago
8 0

35 lbs, your welcome even though you probably don't need the answer anymore

aivan3 [116]3 years ago
6 0

Answer:

the answer is 35 lbs

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NO LINKS!! Use the method of substitution to solve the system. (If there's no solution, enter no solution). Part 11z​
Roman55 [17]

Answer:

(x,y)=\left(\; \boxed{-1,-8} \; \right)\quad \textsf{(smaller $x$-value)}

(x,y)=\left(\; \boxed{5,16} \; \right)\quad \textsf{(larger $x$-value)}

Step-by-step explanation:

Given system of equations:

\begin{cases}y=x^2-9\\y=4x-4\end{cases}

To solve by the method of substitution, substitute the first equation into the second equation and rearrange so that the equation equals zero:

\begin{aligned}x^2-9&=4x-4\\x^2-4x-9&=-4\\x^2-4x-5&=0\end{aligned}

Factor the quadratic:

\begin{aligned}x^2-4x-5&=0\\x^2-5x+x-5&=0\\x(x-5)+1(x-5)&=0\\(x+1)(x-5)&=0\end{aligned}

Apply the <u>zero-product property</u> and solve for x:

\implies x+1=0 \implies x=-1

\implies x-5=0 \implies x=5

Substitute the found values of x into the <u>second equation</u> and solve for y:

\begin{aligned}x=-1 \implies y&=4(-1)-4\\y&=-4-4\\y&=-8\end{aligned}

\begin{aligned}x=5 \implies y&=4(5)-4\\y&=20-4\\y&=16\end{aligned}

Therefore, the solutions are:

(x,y)=\left(\; \boxed{-1,-8} \; \right)\quad \textsf{(smaller $x$-value)}

(x,y)=\left(\; \boxed{5,16} \; \right)\quad \textsf{(larger $x$-value)}

6 0
1 year ago
Read 2 more answers
4 3⁄4 feet = how many inches
Gennadij [26K]
The answer is 57 inches
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3 years ago
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Solve by completing the square with working out <br><br> -6x-x^2-8
Goryan [66]

-6x-x^2-8 = -(x+2) x (x+4)

(This is if you are factoring the expression)

7 0
3 years ago
PLEASE HELP URGENT WILL MARK BRAINLIEST
vovikov84 [41]

Answer:b) intersecting

7 0
2 years ago
Need help on this please
scoundrel [369]

Answer:

It's D

Step-by-step explanation:

2t - 30(\frac{1}{5}) = 20

2t - \frac{30}{1} (\frac{1}{5}) = 20

2t - \frac{30}{5} = 20

2t - 6 = 20

2t - 6 + 6 = 20 +6

2t = 26

\frac{2t}{2} = \frac{26}{2}

t = 13

8 0
3 years ago
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