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3 years ago

Porfa es para un examen xD

Mathematics

2 answers:

Kaylis [27]3 years ago

6 0

I think this is the answer for your problem

Rzqust [24]3 years ago

3 0

Answer: -13

Step-by-step explanation:

M(3) → x = 3
M(2) → x = 2

$\frac{M(3)+M(2)}{2} =\frac{[-2(3)^{2}] +[-2(2)^{2}]}{2}=\frac{(-2)(9)+(-2)(4)}{2}=\frac{-18-8}{2}=\frac{-26}{2}=-13$

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Find the value of 85²-15² using the difference of two squares method

Mekhanik [1.2K]

Answer:

$7000$

Step-by-step explanation:

Recall the form of the difference of squares.

$x^2 - y^2 = (x+y)(x-y)\\\\\\$

Now let's apply it to your numbers:

$85^2 - 15^2 = (85 + 15)(85 - 15)$

Simplify:

$(100)(70) = 7000$

5 0

3 years ago

Convert from Decimal Notation to Scientific Notation

Brrunno [24]

Answer:

Hence, 87,50,000 can be expressed as $8.75 \times 10^{6}$ .

Step-by-step explanation:

- Given 87,50,000

- Use given, move the decimal point so that first factor is greater than or equal to 1 but less than 10 .

- Then count n and write in scientific notation.

Step 1 of 1

Consider 87,50,000.

8.75

So, 8.75 lies between 1 & 10 .

Now, Decimal moved to 6 places at left.

$8.75 \times 10^{6}$

So, $87,50,000=8.75 \times 10^{6}$ .

7 0

2 years ago

Cora says he dosen't need to know the y-interce of a line to write its equation,just its slope and some other point on the line.

Soloha48 [4]

Answer:

Yes, Cora is correct.

The equation of line with point (2,6) and slope of line (-1/3)

is x + 3y - 20 = 0

Step-by-step explanation:

Yes, the equation of a line can be written using a point and a slope of the line equation.

Cora has used the POINT SLOPE FORMULA, to represent the line equation.

In <u>Point Slope formula</u>:

The equation with slope m and points (x0,y0) can be written as:

(y-y0) =m (x-x0)

Here, the point (x0,y0) = (2,6)

and slope m = (-1/3)

So, the equation can be written as: $( y - 6) =\frac{-1}{3} (x-2) \\\implies 3( y-6) = (2-x)\\or, 3y - 18 -2 + x = 0\\or, x + 3y - 20 = 0$

Hence, the equation of line with point (2,6) and slope of line (-1/3)

is x + 3y - 20 = 0

4 0

4 years ago

What's is the value of x<br><br> 1.50(x+6)=27

gogolik [260]

The value of X is 12. STEP 1) distribute the 1.50 to the X and 6 to get 1.50x and 9 STEP 2) subtract 9 from 27 to get 18 STEP 3) divide 18 by 1.5 and you get X=12

4 0

3 years ago

Read 2 more answers

A fair 10-sided die is rolled.

White raven [17]

Answer:

2 fifths 2/5

Step-by-step explanation:

10 sided dice has 10 possibilities so 7 8 9 10 are even or greater than 7 that's 4 out of 10 numbers but in simplest form would be 2/5 (2 fifths)

5 0

3 years ago