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diamong [38]
3 years ago
9

Please help me with this problem!

Mathematics
1 answer:
34kurt3 years ago
3 0
The answer is 3 becuase you have to find the answer
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The cost of a car rental is twenty-five dollars a day plus ten cents a mile. What is the total cost, in dollars, if the car is r
Fudgin [204]

Answer:

The total cost is D) $141

Step-by-step explanation:

To solve we can use the equation: y=25d+0.10m

d= number of days  m= number of miles

We know both of these values so we can plug them in and solve.

y= 25(3) + 0.10(660)

y= 75 + 66

y = 141

4 0
3 years ago
-2 3/4 - 4 7/10 + 2.6 - (1.9) I need it asap as a decimal​
Drupady [299]

Answer:

The answer is -6.75

5 0
2 years ago
Hellopppppppppppppppp
brilliants [131]

Answer:

Step-by-step explanation:

5 0
3 years ago
To get on the top players list , don needs to have a minimum average score of 225 after playing four games. His scores on his fi
Black_prince [1.1K]
Average must be 225 or more
4 games so
\frac{score1+score2+score3+score4}{4}  \geq 225
score1=192
score2=214
score3=250
score4=?
so
\frac{192+214+250+?}{4}  \geq 225
\frac{656+?}{4}  \geq 225
times both sides by 4 to clear fraction
656+?≥900
minus 656 from both sides
?≥244

min score is 244
8 0
3 years ago
Read 2 more answers
2. Carl needs 15 hours longer than Jennifer to paint a room. If they work together, they can complete the job in 4 hours. Explai
nasty-shy [4]

Answer:

Jennifer would complete the job on her own in 5 hours.

Step-by-step explanation:

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

ax^{2} + bx + c, a\neq0.

This polynomial has roots x_{1}, x_{2} such that ax^{2} + bx + c = a(x - x_{1})*(x - x_{2}), given by the following formulas:

x_{1} = \frac{-b + \sqrt{\Delta}}{2*a}

x_{2} = \frac{-b - \sqrt{\Delta}}{2*a}

\Delta = b^{2} - 4ac

Rates

The together rate is the sum of their separates rate.

We have that:

Jennifer takes x hours to complete the job on her own, so her rate is 1/x.

Carl needs 15 hours longer than Jennifer, that is, 15 + x hours, so his rate is 1/(15+x).

The together rate is 1/4. So

\frac{1}{4} = \frac{1}{x} + \frac{1}{15+x}

\frac{1}{4} = \frac{15 + x + x}{x(15+x)}

\frac{1}{4} = \frac{15 + 2x}{x(15+x)}

Applying cross multiplication.

x^2 + 15x = 4(15 + 2x)

x^2 + 15x = 60 + 8x

x^2 + 7x - 60 = 0

Quadratic equation with a = 1, b = 7, c = -60. So

\Delta = 7^{2} - 4*1*60 = 289

x_{1} = \frac{-7 + \sqrt{289}}{2} = 5

x_{2} = \frac{-7 - \sqrt{289}}{2} = -12

Since the time to complete the job has to be a positive value.

Jennifer would complete the job on her own in 5 hours.

4 0
2 years ago
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