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nirvana33 [79]
3 years ago
6

GUYS PLEASE HELP MEEEEETHE OPTION IS :a. 45b. 64c. 73d. 80​

Mathematics
2 answers:
zhenek [66]3 years ago
6 0

Answer:

the answer is d. 80

that's it

rodikova [14]3 years ago
5 0
73 po ang sagot dyan
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The total cost for bowling includes the fee for shoe rental plus fee per game. The cost of each game increases the price by $4.
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3 years ago
Shelby mixes a 25% bleach solution with 5 cups of a 10% bleach solution, resulting in a 20% bleach solution. The table shows the
german

Answer:

10

Step-by-step explanation:

We will use a system of equations to solve this.  We do not know how much of the 25% bleach solution is used; we will use x to represent this.  We know that 5 cups of the 10% solution was used.  We do not know how much of the resulting solution we have; we will use y to represent this.  This gives us the equation

x+5 = y

Using the decimal forms of the percentages for each solution, we have 0.25x (25% solution for x cups), 0.1(5) (10% solution for 5 cups) and 0.2y (20% solution for y cups); this gives us the equation

0.25x+0.1(5) = 0.2y

This gives us the system

\left \{ {{x+5=y} \atop {0.25x+0.1(5)=0.2y}} \right.

To use elimination, we will make the coefficients of x the same by multiplying the top equation by 0.25:

\left \{ {{0.25(x+5=y)} \atop {0.25x+0.5=0.2y}} \right. \\\\\left \{ {{0.25x+1.25=0.25y} \atop {0.25x+0.5=0.2y}} \right.

We will now subtract the second equation from the first:

\left \{ {{0.25x+1.25=0.25y} \atop {-(0.25x+0.5=0.2y)}} \right. \\\\0.75 = 0.05y

Divide both sides by 0.05:

0.75/0.05 = 0.05y/0.05

15 = y

There were 15 cups of the resulting 20% solution.  Substituting this into the first equation, we have

x+5=15

Subtract 5 from each side:

x+5-5=15-5

x = 10

7 0
3 years ago
Read 2 more answers
I need help with Spanish
Colt1911 [192]
Ana es diseñadora
nosotros somos muy delgados
El -es- astronauta

:))
8 0
3 years ago
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