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2 years ago

-3x+7=28 what am i supposed to do once i get it to be -3x=21

Mathematics

1 answer:

Brums [2.3K]2 years ago

4 0

Answer:

You would divide by -3, in this case x would be -7

Step-by-step explanation:

-3/-3 = x -3/21 = -7

x=-7

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mark bought 8 boxes .A week later half of all his boxes were destroyed in a fire there are now only 20 boxes left. With how many

strojnjashka [21]

Answer:

32 boxes

Step-by-step explanation:

20 · 2 = 40 - 8 = 32

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3 years ago

Factor: 2n2 - 11n + 15

KATRIN_1 [288]

Answer:

(2n-1)(n-5)

Step-by-step explanation:

2n2-11n+5

2n2-10n-1n+5

(factorize)

2n(n-5)-1(n-5)

(2n-1)(n-5)

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2 years ago

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Scorpion4ik [409]

Answer:

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Step-by-step explanation:

8 0

3 years ago

Given P(x) = 2x3 - 11x2 + 18x - 15 is divided by x – 3. Use synthetic division to find the quotient and the remainder.

katrin [286]

You can find the remainder right away by simply plugging in $x=3$ . The polynomial remainder theorem guarantees that the value of $p(3)$ is the remainder upon dividing $p(x)$ by $x-3$ , but I digress...

Synthetic division yields

3   |   2   -11   18   -15
.    |           6   -15     9
- - - - - - - - - - - - - - - - -
.    |   2     -5     3     -6

which translates to

$\dfrac{2x^3-11x^2+18x-15}{x-3}=2x^2-5x+3-\dfrac6{x-3}$

(and note that $p(3)=2(3)^3-11(3)^2+18(3)-15=-6$ , as expected)

5 0

3 years ago

Rx+h=sx-k solve for x

timama [110]

Rx + h = sx - k Take all with x to the LHS

Rx - sx = -k - h

x(R - s) = - k -h

x = (-k - h) / (R - s). Multiply top and bottom by -1.

x = (k + h) / (s - R)

6 0

4 years ago