3 years ago

1. True or False: Please answer the questions in the boxes provided.

Mathematics

1 answer:

vivado [14]3 years ago

3 0

Answer:

trufe

Step-by-step explanation:

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Combine the like terms to create an equivalent expression: <br> 2s-( -4s)= ?

Ghella [55]

Answer:

Step-by-step explanation:

1. 2s-(-4s)

2. 2s+4s

3. 6s

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3 years ago

This was useless because a selected the exact answers and they where all wrong :(

ivanzaharov [21]

Answer:

srry

Step-by-step explanation:

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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

Use the discriminant to find the number of real roots in Y = x^2 – 6x + 9

BaLLatris [955]

So discriminant is being counted from that equation:
b^2-4ac = 36-36 = 0

As discriminant is 0, then there is just 1 root -> -b/2a = 6/2 = 3.

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4 years ago

The ratio of the measures of the three angles in a triangle is 9:3:6.

Alex

Step-by-step explanation:

this is how you solve it :)

5 0

2 years ago