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Basile [38]
3 years ago
5

WILL MARK BRAINLIEST

Mathematics
2 answers:
Effectus [21]3 years ago
7 0

Answer:

1,2,5

Step-by-step explanation:

4vir4ik [10]3 years ago
3 0
The first and third one
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PLEASE PLEASE HELP I REALLY NEED IT <br> QUESTION 2
alukav5142 [94]
It will take her 51.4 minutes.


Explanation:

You would do 12/7 and then multiply that answer by 30.

7 0
3 years ago
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A motorboat travels 432 kilometers on 6 hours going upstream and 384 km in 4 hours going downstream. What is the rate of the boa
antiseptic1488 [7]
Going upstream: 432 km / 6 hours = 72 km/h
Going downstream: 384 km / 4 hours = 96 km/h
Going upstream against the current means that the effective speed is:
r_boat - r_current = 72
Meanwhile, going downstream with the current means;
r_boat + r_current = 96
Adding both equations (to cancel out r_current) gives:
2r_boat = 72 + 96
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6 0
3 years ago
Write 3x^2-18x-6 in vertex form
Vedmedyk [2.9K]
The standard form of a quadratic equation is \displaystyle{ y=ax^2+bx+c, while the vertex form is:

                      y=a(x-h)^2+k, where (h, k) is the vertex of the parabola.

What we want is to write \displaystyle{ y=3x^2-18x-6 as y=a(x-h)^2+k

First, we note that all the three terms have a factor of 3, so we factorize it and write:

\displaystyle{ y=3(x^2-6x-2).


Second, we notice that x^2-6x are the terms produced by (x-3)^2=x^2-6x+9, without the 9. So we can write:

x^2-6x=(x-3)^2-9, and substituting in \displaystyle{ y=3(x^2-6x-2) we have:

\displaystyle{ y=3(x^2-6x-2)=3[(x-3)^2-9-2]=3[(x-3)^2-11].

Finally, distributing 3 over the two terms in the brackets we have:

y=3[x-3]^2-33.


Answer: y=3(x-3)^2-33
6 0
3 years ago
Can someone please help me with this ?
natulia [17]
13. 1,6

18. -15,12

19. -7, 1/2
4 0
3 years ago
Which ordered pair represents the y-intercept of the graph of the equation y = -5x + 6?
Sonja [21]

The answer is A (0,6)


3 0
3 years ago
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