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vfiekz [6]
3 years ago
5

1.x2+3x+3=0 2.x2-2x-3=0 3.x2-6x+9=0 4.-x2+3=0

Mathematics
1 answer:
trasher [3.6K]3 years ago
5 0

Step-by-step explanation:

the two A's in the buttom is correct

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Sarah took out a $30,000 loan at a 4% interest rate to put a new pool in her backyard. If the interest is compounded quarterly,
andrey2020 [161]

Answer: $48,366.78

Step-by-step explanation:

3000(1+0.04/4) 4t

4 0
2 years ago
Seven pieces of rope have an average (arithmetic mean) length of 68 centimeters and a median length of 84 centimeters. If the le
Svet_ta [14]

Answer:

The maximum possible length, in centimeters, of the longest piece of rope is 134 cm

Step-by-step explanation:

Let the seven pieces be a,b,c,d,e,f,g

Average of 7 pieces of ropes  =68

Average = \frac{\text{Sum of all lengths}}{\text{No. of pieces}}

68= \frac{\text{Sum of all lengths}}{7}

68 \times 7 =\text{a+b+c+d+e+f+g}

476=\text{a+b+c+d+e+f+g} --A

We are given that the median length of a piece of rope is 84 centimeters.

We arrange the pieces in the ascending order

So, median will be the length of 4th piece

So, d = 84 cm

the length of piece a,b,c will be less than 84 and the value of e,f,g must be greater than or equal to 84

Let us suppose the length of a,b,c be x

Let us suppose the length of e,f be 84

The length of the longest piece of rope is 14 centimeters more than 4 times the length of the shortest piece of rope

So, g = 4x+14

Substitute the value in A

476=x+x+x+84+84+84+4x+14

476=7x+266

\frac{476-266}{7}=x

30=x

g = 4x+14=4(30)+14=134

Hence the maximum possible length, in centimeters, of the longest piece of rope is 134 cm

7 0
3 years ago
A boat rental charges a flat fee of $45 and $4 per hour. Which expression represents the total cost to rent a boat for h hours
vichka [17]

Answer:

45h+ 4

Step-by-step explanation:

you got to divide but the expression is 45h+4

5 0
3 years ago
5x (-2w-4) I need this asap
ira [324]

Hello from MrBillDoesMath!

Answer:

-10w - 20


Discussion:

5 ( -2w - 4 )   =                    

5(-2w) - 5(4) =

-10w - 20

Thank you,

MrB

4 0
3 years ago
Erin is making a dozen cupcakes and wants to put 3 chocolate kisses on top of each one. How many does she need?
QveST [7]

Answer:

C. 36

Step-by-step explanation:

3x12=36 :]

3 0
3 years ago
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