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3 years ago

2.5(6v-4)=10+4(1.5+0.5)

1 answer:

8 0

$2.5(6v-4)=10+4(1.5+0.5)\\\\(2.5)(6v) - 2.5(4)=10 + 4(1.5) + 4(0.5)\\\\15v - 10 = 10 + 6+2 \\\\15v - 10 = 18\\\\15v - 10 + 10 = 18 + 10\\\\15v = 18\\\\\frac{15v}{15} =\frac{18}{15} \\\\v = \frac{18}{15}\\\\v = \frac{6\times 3}{5\times 3}\\\\v=\frac{6}{5}\\\\\boxed{\bf{ v = \frac{6}{5} = 1\frac{1}{5}}}$

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The ceiling of Katie’s living room is a square that is 15 ft long on each side. To decorate for a party, she plans to hang crepe

goldfiish [28.3K]

I think that 3 rolls is wrong and that 6 rolls is right. If you create a 15 by 15 square and draw two lines through the center that connect to the opposite corner, you'll be able to use the Pythagorean Theorem.

Perimeter: 15+15+15+15=60ft.

Length of Line from Corner to Corner:

(15)(15)+(15)(15)=C^2

225+225=C^2

450=C^2

21.2=C

21.2(2)= 42.4ft.

42.4ft.+60ft.= 102.4ft.

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3 years ago

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denis23 [38]

Answer: #7 is A and #8 is D

Step-by-step explanation:

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3 years ago

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A rectangular swimming pool has an area of (70x + 10) square feet. Find possible dimensions of the pool.

Ann [662]

Answer:

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3 years ago

There are 205 coins in a jar all of which are either nickles or quarters . The vaule of the coin in the jar is $31.85. if both o

Gnesinka [82]

Answer: There are 97 nickels and 108 quarters.

Step-by-step explanation:

Let x = Number of nickels, y = Number of quarters.

As per given,

x+y = 205 ...(i)

0.05x+0.25y = 31.85 ... (ii) [1 nickel = $0.05, 1 quarter = $ 0.25]

Multiply (ii) by 20, we get

x+5y=637 ...(iii)

Eliminate (i) from (iii)

4y = 432

⇒ y = 108 [Divide both sides by 4]

Put value of y in (i), we get

$108+x=205\Rightarrow\ x= 97$

Hence, there are 97 nickels and 108 quarters.

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3 years ago

(1,4,9,4,10,8,42)

mixas84 [53]

The answer is has to be D

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3 years ago