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3 years ago

One of the solutions to x2 − 2x − 15 = 0 is x = −3. What is the other solution?

2 answers:

7 0

If you factor the equation you can see what the solutions are. Two factor a quadratic of the form ax^2+bx+c, find two values which satisfy two conditions...

jk=ac=-15 and j+k=b=-2 so j and k must be -5 and 3 so the factors are:

(x-5)(x+3)

So the other solution is x=5

Tcecarenko [31]3 years ago

6 0

The answer is D) X=5 on E2020 (:

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Find a point-slope form for the line that satisfies the stated conditions.

san4es73 [151]

Y-6=7(x-3)
The point-slope intercept form of a line that has a slope of 7 and passes through the point (-6,3) is y - 6 = 7 (x - 3)

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3 years ago

The Venn diagram shows the results of two events resulting from rolling a number cube.

tankabanditka [31]

Answer:

$P(A|B)=\frac{2}{3}$

$P(A)*P(B)=\frac{1}{3}$

$P(A) =\frac{2}{3}$

$P(B) =\frac{1}{2}$ .

Step-by-step explanation:

We use the Venn diagram to calculate the desired probabilities.

Note that there are 6 possible results in the sample space

S = {1, 2, 3, 4, 5, 6}

Then note that in the region representing the intercept of A and B there are two possible values.

$P (A\ and\ B) = \frac{2}{6} = \frac{1}{3}$

In the region that represents event A there are 4 possible outcomes {4, 5, 1, 2}

$P(A) = \frac{4}{6} = \frac{2}{3}$

In the region that represents event B there are 3 possible outcomes {1, 2, 6}

$P(B) = \frac{3}{6} = \frac{1}{2}$ .

Now

$P(A | B)=\frac{P(A \ and\ B)}{P(B)}\\\\P(A | B)=\frac{\frac{1}{3}}{\frac{1}{2}}\\\\P(A|B)=\frac{2}{3}$

$P(A)*P(B)=\frac{2}{3}*\frac{1}{2}=\frac{1}{3}$

6 0

4 years ago

Which defines a circle a. Two days with a common endpoint b. A piece of a line with two endpoints c. A piece of a line with one

nordsb [41]

Answer:

The correct answer is d.

Step-by-step explanation:

Any point that is co planar with one another and is also equidistant from a given point is a circle. We need it to be co planar, otherwise it would be 3-dimensional and create a sphere. And if they we not all equidistant, they would not make an even circle (it'd be an oval or another shape).

8 0

3 years ago

What is the integer for -22 + (-16) =

natka813 [3]

Answer:

-38

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

I'm not sure how to make a formula for these type of things? i don't understand what's going on.

charle [14.2K]