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liberstina [14]
3 years ago
13

Which expression is equivalent to 4 over 9 (2n - 3)

Mathematics
1 answer:
AlexFokin [52]3 years ago
3 0

Answer:

The result for this equation is \frac{8}{9}n - \frac{4}{3} .

Step-by-step explanation:

-Solve:

\frac{4}{9} (2n-3)

-Multiply 2n and -3 by \frac{4}{9} :

\frac{8}{9} + \frac{-12}{9}

-Reduce \frac{-12}{9} to the lowest term by extracting and canceling out 3:

\frac{8}{9}n - \frac{4}{3}

-So, the result is \frac{8}{9}n - \frac{4}{3} .

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If 4700 bricks each of size 25 cm x 16 cm x 10 cm are required to construct a wall
Rzqust [24]

Answer:

970 cm

Step-by-step explanation:

Given that:

Size of brick :

25cm × 16cm × 10cm

Number of bricks = 4700

Dimension of wall = 20 m long × 20 cm wide

Let the height = h

Hence, dimension of wall (length and height)

2000 cm × h

Dimension of window = 2m × 1.5m = 200cm × 150cm

Number of windows = 2

Total area covered by windows = 2 * (L * B)

= 2(200 * 150) = 60,000cm

Brick = (25 * 16) * 4700 = 1, 880, 000 cm ( length and height)

Wall = 2000 * height - 60,000 = 1880000

2000height - 60,000 = 1880000

2000height = 1880000 + 60,000

2000height = 1940000

Height = 1940000 / 2000

Height of wall = 970 cm

6 0
3 years ago
Reagan solved 5.25 ÷ 5 and got 105. What did Reagan do wrong?
horrorfan [7]

Answer:

he forgot to put the decimal point

Step-by-step explanation:

answer is 1.05.

4 0
3 years ago
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What is the vertex of the parabola?
Nina [5.8K]

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(0,5)

Step-by-step explanation:

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2/5 + 3/8 - Adding fractions
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Step-by-step explanation:

To add you have to have a common denominator. To get that you can multiply each fraction by one in different ways. 2/5 *8/8= 16/40 and 3/8* 5/5= 15/40 and then add those two to give you 31/40.

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Answer:

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Step-by-step explanation:

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Therefore, the unit price of each battery is $1.75.

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3 years ago
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