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Leona [35]
3 years ago
14

Please help me with math i need it soon

Mathematics
2 answers:
Bas_tet [7]3 years ago
8 0
Divide each price by the number of cubic yards it buys to find the cost per cubic yard.

A. $165/(3 yd³) = $55/yd³

B. $240/(4 yd³) = $60/yd³

C. $300/(6 yd³) = $50/yd³

D. $360/(8 yd³) = $45/yd³ . . . . . . . this is the best price per cubic yard.
AnnyKZ [126]3 years ago
6 0
Lets get started :)

We are told that Mrs. Thymes is buying mulch for her gardens.

Let us check the price for each option:

\boxed {Option \ A}
3 yd³ for $165
Divide 165 by 3, to find the price per cubic yard:
\frac{165}{3} = $55 per cubic yard

\boxed {Option \ B }
4 yd³ for $240
Do the same:
\frac{240}{4} = $60 per cubic yard

\boxed {Option \ C }
6 yd³ for $300
\frac{300}{6} = $50 per cubic yard

\boxed {Option \ D }
8 yd³ for $360
\frac{360}{8} = $45 per cubic yard

Therefore, we can see that 8 yd³ for $360 is the best price

\boxed {Your \ Answer \ will \ be \ Option \ D }
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Jose is working two summer jobs, making $10 per hour washing cars and $9 per hour walking dogs. Last week Jose worked a total of
Setler [38]

Answer:

x+y =13

10x + 9y =122

Step-by-step explanation:

Hi, to answer this question we have to write a system of equations:

The sum of the hours he worked washing cars (x) and the hours he worked walking dogs(y) will be equal to the total hours worked (13)

  • x+y =13

For the second equation the product of the number of hours he worked washing cars(x) and the price per hour ($10) plus the product of the number of hours he worked walking dogs (y) and the price per hour ($9) will be equal to the total amount earned (122)-

  • 10x + 9y =122

So, the system of equations is:

  • x+y =13
  • 10x + 9y =122

Where:

x: number of hours Jose worked washing cars

y: number of hours Jose worked walking dogs  

7 0
3 years ago
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Evaluate for f=3. 2f - f +7
CaHeK987 [17]
2(3) - 3 + 7 = 6 - 3 + 7 = 10
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Ayuda es para un examen
Kazeer [188]
Es 5 por la x y la y
4 0
3 years ago
How many L of an 85% alcohol solution must be mixed with 6 L of a 55% alcohol solution to make a 65% solution?
zepelin [54]

Answer:

3 Liters of the 85% Solution

Step-by-step explanation:

You have to draw your buckets. I can't on computer so imagine the fraction bar is the bottom of the buckets.

\frac{85}{x}+\frac{55}{6}=\frac{65}{x+6}

Then we multiply the top of the buckets with the bottom:

85x+330=65x+390

Now we simplify and solve

20x=60

x=3

You need 3 liters of the 85% solution!

4 0
3 years ago
How many counterexamples do you need to prove a conjecture to be false
Hoochie [10]

Answer:

one , i guess....

because the conjecture is only true if it satisfies all the cases.

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