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4 years ago

PLZZ HELP!!!MMMMMMMMMMMMMMMMMMMMMMMMMMMMM

Mathematics

2 answers:

ioda4 years ago

6 0

Answer:

15y-10/15y+3

Step-by-step explanation:

Multiply y by 15, then multiply the fraction by 15.

You end up getting the answer.

Lyrx [107]4 years ago

5 0

Answer:

i think A.

Step-by-step explanation:

sorry dont have time to type an explanation

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Hello, can someone help me with the working out to this problem

timama [110]

$\text{If}~ \alpha ~\text{and}~ \beta~ \text{are the roots,}\\ \\x^2 -(\alpha + \beta)x +\alpha\beta = 0\\\\\text{For}~ x^2+3x-2=0\\\\\alpha +\beta=-\dfrac ba=-3\\ \\\alpha \beta = \dfrac ca = -2\\\\$

$\text{So,~} \alpha^3+\beta^3 = (\alpha + \beta)(\alpha^2 + \beta^2 -\alpha \beta)\\ \\~~~~~~~~~~~~~~~~=(\alpha+\beta)\left[(\alpha +\beta)^2 -2\alpha \beta - \alpha \beta\right]\\\\~~~~~~~~~~~~~~~~=(\alpha+\beta)\left[(\alpha +\beta)^2 -3\alpha \beta \right]\\\\~~~~~~~~~~~~~~~~=-3\left[(-3)^2-3(-2)\right]\\\\~~~~~~~~~~~~~~~~=-3(15)\\\\~~~~~~~~~~~~~~~~=-45\\\\\text{And}~~~\alpha^3 \beta^3= (\alpha \beta )^3 = (-2)^3 = -8\\\\$

$\text{Hence the equation whose roots are}~ \alpha^3 ~\text{and}~ \beta^3~ \text{is:}\\ \\ x^2-(\alpha^3 + \beta^3)x +\alpha^3 \beta^3 =0\\\\\implies x^2 -(-45)x+(-8)=0\\\\\implies x^2 +45x -8=0$

3 0

3 years ago

Evaluate,

kirill [66]

With 10 to the power to a negative number, it's easier.
Here's a trick: The negative number is the places to the right of the decimal. The last number is a 1, while the rest are 0s.

From this, we get: $10^{-4}=\boxed{0.0001}$

5 0

3 years ago

Read 2 more answers

You reflect triangle PQR, with vertices P(-2, -4), Q(-3, -1), and R(-4, -4), across the y-axis to get triangle P′Q′R′. What are

weeeeeb [17]

Answer:

D. (2, -4),(3, -1), (4, -4)

Step-by-step explanation:

Hello!

When you reflect over the y-axis you reverse the x.

Negatives become positives and positives become negatives

(-2, -4) turns into (2, -4)

(-3, -1) turns into (3, -1)

(-4, -4) turns into (4, -4)

look for the answer that has (2, -4),(3, -1), and (4, -4)

The answer is D

Hope this helps!

5 0

4 years ago

Select the sets that are not functions.

DedPeter [7]

Answer:

Sets D, E

Step-by-step explanation:

Sets D and E both have repeated x-values , thus making them a relation not a function.

5 0

3 years ago

A zombie lost 3 limbs each day for 4 days.

blondinia [14]

Answer:

-12 tells us the amount of limbs lost.

Explanation:

-3 means that the zombie lost 3 limbs.

If the zombie loses three limbs every day for 4 days, it results in the zombie losing 12 limbs and so therefore -12.

-3 x 4 = -12

-12 is the product of the equation.

hope that helps

7 0

2 years ago