2 years ago

Please answer all

Mathematics

1 answer:

mr_godi [17]2 years ago

7 0

Answer:

Give me these points

Step-by-step explanation:

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A triangle has an area of 48 square units. Its height is 8 units.

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Area of triangle= 1/2(bh)
So u do the reverse to find the base
48 x 2 which equals 96
Then u divide
96 divided by 8 = 12
Length of base equals 12

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3 years ago

Solve this equation <br>4-2x-12-2x+1

alina1380 [7]

This is not an equation because it lacks an equal sign....so the only thing we can do here is combine like terms.
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3 years ago

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What is the average (arithmetic mean) of the first 90 measurements in a certain list of 92 measurements? (1) the average of the

marishachu [46]

The sum of all the measurements is just the average times the number.

$\bar x = \frac{1}{n} \sum_{i=1}^n x_i$

$\sum_{i=1}^n x_i = n \bar x$

So if the average of all 92 is 7 the sum of those is $92 \times 7$

The average of the last two is 7.2 so their sum is $2 \times 7.2$

That means the sum of the first 90 is $92 \times 7 - 2 \times 7.2$

so the average of the first 90 is

$\dfrac{92 \times 7 - 2 \times 7.2}{90} = 6.99556$ cm

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3 years ago