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Nana76 [90]
3 years ago
6

Darryl wants to add enough water to 8 gallons of a 10% bleach solution to make a 5% bleach solution. Which equation can he use t

o find x, the number of gallons of water he should add?
1.( \frac{0.8}{8 + x} )( \frac{5}{100}  = 1 \\ 2. \frac{0.8}{8 + x}  =  \frac{5}{100} \\ 3. \frac{0.8}{8 + x} =  \frac{100}{5} \\ 4. \frac{0.8}{8 + x}  \div  \frac{5}{100}  = 1

​
Mathematics
1 answer:
Margarita [4]3 years ago
4 0

Answer:

2) 0.8/8+x=5/100

Step-by-step explanation:

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Student Produced Response - Calculator
faltersainse [42]

Answer:

\dfrac{a}{b}=0.75.

Step-by-step explanation:

If two equations a_1x+b_1y+c_1=0 and a_2x+b_2y+c_2=0 has infinitely many solutions, then

\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}=\dfrac{c_1}{c_2}

The given equations are

ax+by=10

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It is given that the above system of equations has infinitely many solutions. So,

\dfrac{a}{3}=\dfrac{b}{4}=\dfrac{10}{20}

\dfrac{a}{3}=\dfrac{b}{4}=\dfrac{1}{2}

Now,

\dfrac{a}{3}=\dfrac{1}{2} and \dfrac{b}{4}=\dfrac{1}{2}

a=\dfrac{3}{2} and b=\dfrac{4}{2}

a=1.5 and b=2

So, a=1.5 and b=2.

Now,

\dfrac{a}{b}=\dfrac{1.5}{2}=0.75

Therefore, \dfrac{a}{b}=0.75.

5 0
3 years ago
A sports stadium has 10000 seats, divided into box seats, lower-deck seats, and upper-devk seats. Box seats sell for 10 dollars,
lesantik [10]

Answer:

Number of box seats = 1000

Number of lower deck seats = 5000

Number of upper deck seats = 4000

Step-by-step explanation:

Let number of box seats = x

Let number of lower deck seats = y

Let number of upper deck seats = z

As per question statement:

x+y+z=10000 ...... (1)

Cost for box seat = $10

Cost for x box seats = 10x

Cost for lower deck seat = $8

Cost for y lower deck seats = 8y

Cost for lower deck seat = $5

Cost for z lower deck seats = 5z

As per question statement:

10x+8y+5z=70000 ..... (2)

z = 4x ..... (3)

Putting value of y in (1) and (2):

x+y+4x=10000\\\Rightarrow 5x+y=10000 ....... (4)

10x+8 y+5\times 4x=70000\\\Rightarrow 30x+8y=70000 ..... (5)

8 \times (4) - (5):

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By (3):

z = 4000

Now, by equation (1):

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6 0
3 years ago
X^2+4x-11=0 what is the solution set?
Sauron [17]

Answer:

The solution set can be calculatedby the following steps;

Step-by-step explanation:

5 0
3 years ago
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agasfer [191]

Answer:

mean= 8.8

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mode= 9

range= 10

ANSWER: A

Step-by-step explanation:

6 0
3 years ago
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