3 years ago

Simplify (-5) + (-2) - (-7) - (+9)

Mathematics

1 answer:

Alecsey [184]3 years ago

3 0

-5-2+7-9 = -9

- and - make a plus :)

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HELP ASAP PLZ &THANK YOU :)

Andre45 [30]

The standard form:

$Ax+By=C$

The slope-intercept form:

$y=mx+b$

m - slope

$m=\dfrac{y_2-y_1}{x_2-x_1}$

b - y-intercept (0, b).

We have the point (0, 43) → b= 43.

Next point (2, 55). Substitute to the slope formula:

$m=\dfrac{55-43}{2-0}=\dfrac{12}{2}=6$

Therefore we have:

$y=6x+43$ <em>subtract 6x from both sides</em>

$\boxed{-6x+y=43}$

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the answer is 150

Step-by-step explanation:

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RSM wants to send four of its 18 Math Challenge teachers to a conference. How many combinations of four teachers include exactly

tatiyna

Answer:

1120 combinations of four teachers include exactly one of either Mrs. Vera or Mr. Jan.

Step-by-step explanation:

The order in which the teachers are chosen is not important, which means that the combinations formula is used to solve this question.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

In this question:

1 from a set of 2(Either Mrs. Vera or Mr. Jan).

3 from a set of 18 - 2 = 16. So

$C_{2,1}C_{16,3} = \frac{2!}{1!1!} \times \frac{16!}{3!13!} = 1120$

1120 combinations of four teachers include exactly one of either Mrs. Vera or Mr. Jan.

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3 years ago

Divide. (4x^3+2x+1)÷(x+1)

stiks02 [169]

$(4x^3+2x+1)\div(x+1)=4x^2-4x+6-\dfrac{5}{x+1}$

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Answer:

customers≥50*temp

Step-by-step explanation:

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