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3 years ago

Expres in simplest form:

Mathematics

2 answers:

dsp733 years ago

8 0

Answer:

5x2+8x-6

the 2 is little

Dahasolnce [82]3 years ago

4 0

Answer:

5 $x^{2}$ - 10

Step-by-step explanation:

(3 $x^{2}$ + 4x - 8) - (-2 $x^{2}$ + 4x + 2) = 3 $x^{2}$ + 4x - 8 + 2 $x^{2}$ - 4x - 2

= 5 $x^{2}$ - 10

Hope this helps :)

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Buying one movie ticket online costs $16.50. Two tickets cost $30.50. Assuming that the relationship is linear, use the drop dow

HACTEHA [7]

Answer:

$C(n)=14n+2.50$

Step-by-step explanation:

Let

n -----> number of tickets

C ----> represent the cost of buy n tickets online

we have the ordered pairs

(1,16.50) and (2,30.50)

<em>Find out the slope of the linear equation</em>

The formula to calculate the slope between two points is equal to

$m=\frac{C2-C1}{n2-n1}$

substitute the values

$m=\frac{30.50-16.50}{2-1}$

$m=14$

<em>Find the equation of the line in slope intercept form</em>

$C=m(n)+b$

we have

$m=14$

$point(1,16.50)$

substitute

$16.50=14(1)+b$

$b=16.50-14$

$1b=2.50$

substitute

$C(n)=14n+2.50$

The domain of the function is all positive integers (whole numbers) including zero

{0,1,2,3,4,...}

5 0

3 years ago

A psychologist is interested in constructing a 99% confidence interval for the proportion of people who accept the theory that a

Leona [35]

Answer:

B is correct i think

Step-by-step explanation:

4 0

3 years ago

The equation of a line is y=-2.5x+3. Which one of these points lies on this line?

lakkis [162]

D is the correct answer. Since this is an equation, equation means both side are equal. So if you put each point in place of y and x and do the math on the left side, the final result of that side has to be equal to the left one. Only (-2,2) follows this statement aka its a point on this line .

7 0

3 years ago

Which ratio is equivalent to 4/9

Dmitrij [34]

Answer:

D. 12/27

Step-by-step explanation:

Ratios are just like fractions

12 ÷ 3 = 4

27 ÷ 3 = 9

4/9 is 12/27 simplified by 3

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