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Inga [223]
3 years ago
11

What's the simplified form of x - 1 + 4 + 7x - 3 ?

Mathematics
2 answers:
Sati [7]3 years ago
5 0

That would be 8x, Aubreglorgaby.

x - 1 + 4 + 7x -3

8x - 1 + 4 - 3

8x + 3 - 3

8x + 0

8x

Tomtit [17]3 years ago
3 0
The correct answer would be 8x. Please vote Brainliest I just took the exam and it was correct!!!
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The student population at King Middle School is 52% female. The total student population is 1,225 students. How many boys go to
r-ruslan [8.4K]

Answer:

588 boys in king middle school

Step-by-step explanation:

52% of 1225 is 637.      1225 - 637 = 588 meaning 588 boys attend king middle school.

I hope this helps! Please give me brainliest!

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3 years ago
The table represents a linear function.
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Tutorial Exercise A boat leaves a dock at 2:00 PM and travels due south at a speed of 20 km/h. Another boat has been heading due
ANTONII [103]

Answer:

Both the boats will closet together at 2:21:36 pm.

Step-by-step explanation:

Given that - At 2 pm boat 1 leaves dock and heads south and boat 2 heads east towards the dock. Assume the dock is at origin (0,0).

Speed of boat 1 is 20 km/h so the position of boat 1 at any time (0,-20t),

        Formula :   d=v*t

at 2 pm boat 2 was 15 km due west of the dock because it took the boat 1 hour to reach there at 15 km/h, so the position of boat 2 at that time was (-15,0)

the position of boat 2 is changing towards east, so the position of boat 2 at any time (-15+15t,0)

      Formula : D=\sqrt{(x2-x1)^2+(y2-y1)^2}

⇒                     D = \sqrt{20^2t^2+15(t-1)^2}

Now let           F(t) = D^2(t)

                ∵    F'(t) = 800t + 450(t-1) =  1250t -450\\F'(t) =0

⇒                     t= 450/1250

⇒                     t= .36 hours

⇒                       = 21 min 36 sec

Since F"(t)=0,

∴ This time gives us a minimum.

Thus, The two boats will closet together at 2:21:36 pm.

3 0
3 years ago
Helpppp ahhhhhhh plz
kaheart [24]

Answer:

It's Parallel

Step-by-step explanation:

Perpendicular have to intersect  

3 0
3 years ago
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