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Bingel [31]
3 years ago
7

Help plzzz!! Marking most Brainly;)

Mathematics
1 answer:
kolezko [41]3 years ago
3 0

Answer:

D it

Step-by-step explanation:

We have two equations, A quadratic and a linear equation.

The domain of a linear equation and quadratic equation is all real numbers but since it dealing with time we must make sure the roots or x-intercepts is positive.

Looking at the quadratic equation, we can use the discramnt formula to see if all roots are positve.

b {}^{2} - 4ac

{ - 6}^{2}  - 4(1)(8.75)

36 - 35 = 1

The discramnt is greater than zero so there is two distinct real roots. So let check if they are positve

If you graph the equation, it intercepts at two positve roots so it is D

You might be interested in
the top of a giant slide is 30 ft. off the ground the slide rises at a 30 degree angle. to the nearest whole foot, what is the d
wel
I think you need to use the SoHCaHToA method here.

S means sin
C means cos
T means tan
O means opposite
H means hypotenuse
A means adjacent

The hypotenuse is the longest side in a right angled triangle.

The adjacent is the side between the angle and the right angle.

The opposite is the side that is left.

If you have the value of the opposite cross all of the o's out. The same with the other sides. If only one type of letter is crossed out, cross out the type of letter that stands for the length you want to find. The part of the word with two crosses tells you what function to use (sin, cos or tan)

In this example, the function used will be sin.

sinx°=o÷h
cosx°=a÷h
tanx°=o÷a

since we are using sin, the formula we will use is :

sinx°=o÷h

Then you plug in what you know.

sin30°=30÷h
h=30÷sin30°
h=60ft

If there was a case when you needed to work out an angle, inverse sin, or cos, or tan would be used.
7 0
4 years ago
HElpppppppppppppppppppp
-BARSIC- [3]

Answer:

looks  hard

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Solve the following equation. Then placed a correct number in the box provided. -13 - 3x = -10
Alisiya [41]

Answer:

x=-1

Step-by-step explanation:

-3x=-10+13 - -3x=3 - -3 = -1

5 0
4 years ago
Explain why P(A|D) and P(D|A) from the table below are not equal.
trasher [3.6K]

Answer:

The Probability that Event A and  Event D occur is equal to the probability Event A occurs times the probability that Event D occurs, given that A has occurred.


P(A\cap D)=P(A)\cdot P(D/A)

We can find the values of P(A/D) and P(D/A) using the above form formula.

P(D/A)=\frac{P(A\cap D)}{P(A)} ;

P(A/D)=\frac{P(D\cap A)}{P(D)}

From the given table, we have the values of P(A), P(D), P(D\cap A) and P(A\cap D).

Since, Probability=\frac{The number of wanted outcomes }{the number of possible outcomes}

∴P(A)=\frac{8}{17}, P(D)=\frac{10}{17}, P(A\cap D)=\frac{2}{17} and P(D\cap A)=\frac{2}{17}

Now, putting these values in above formula we get,

P(D/A)=\frac{\frac{2}{17}} {\frac{8}{17}}

P(D/A)=\frac{2} {8}=\frac{1}{4}

P(D/A)= \frac{1}{4}.

P(A/D)=\frac{\frac{2}{17}} {\frac{10}{17}}=\frac{2}{10}

P(A/D)=\frac{1}{5}

As, you can see above that the values of P(A|D) and P(D|A) are not equal.









5 0
3 years ago
Read 2 more answers
4x-5=7+4y<br> How do you solve?
solong [7]
 solve for x.

4x−5=7+4y

Add 5 to both sides.

4x−5+5=4y+7+5

4x=4y+12

Divide both sides by 4.

4x/4=4y+12/4

x=y+3

-----------------------------------------------------
Have a nice day! :)

5 0
4 years ago
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