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2 years ago

What is the slope intercept equation for (1, 2), (−2, −1)

Mathematics

1 answer:

N76 [4]2 years ago

7 0

Answer:The slope is 1

Step-by-step explanation:

y2-y1=-3

x2-x1=-3

put them into a fraction and the slope is 1 because -3/-3=1

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Find the sum and product of the roots. 2x^2 + 6x - 8 = 0

netineya [11]

Suppose you can factorize:

$ax^2+bx+c=a(x-r_1)(x-r_2)$

Then by expanding the right side, you have

$ax^2+bx+c=a(x^2-(r_1+r_2)x+r_1r_2)=ax^2-a(r_1+r_2)x+ar_1r_2$

which means in this case, you have to have

$\begin{cases}6=-2(r_1+r_2)\\-8=2r_1r_2\end{cases}\implies\begin{cases}r_1+r_2=-3\\r_1r_2=-4\end{cases}$

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3 years ago

What is the value of x when x/6 = 198?

docker41 [41]

Should be 1,188 , because 1,188 divided by six would be 198, hope I could help

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3 years ago

Shawn earned $2.77 per day for three days as interest on his $1,000.00 investment. What percent interest did he earn in total? G

Nady [450]

Answer: He earned 0.831% interest in total.

Step-by-step explanation:

Given: Shawn earned $2.77 per day for three days as interest on his $1,000.00 investment.

Interest per day = $2.77

Interest in 3 days = 3 x ($2.77)

= $8.31

Invested amount= $1000

Required percentage of earnings = $\dfrac{\text{Interest earned in 3 days}}{\text{Initial investment}}\times100$

$=\dfrac{8.31}{1000}\times100=0.831\%$

Hence, he earned 0.831% interest in total.

7 0

3 years ago

sara found a pair of jeans that was originally marked 85.00 but now have a clearance sticker for 54.50 what percent were the jea

Y_Kistochka [10]

U have to subtract from 85.00 from 54.00

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2 years ago

What are factors of 30

Dennis_Churaev [7]

1,2,3,5,6,10,15,30 because by looking at the number at the ones place, when it is 0 or an odd number, it could be divided by 2. When the places are added together and when it is divisible by 3, it is the factor of 3. Also, when there are 2 and 3 as a factor, it is also divisible by 6.

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3 years ago