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3 years ago

Help help help help help pls

Mathematics

1 answer:

Degger [83]3 years ago

8 0

Answer:

Option (D)

Step-by-step explanation:

Kevin delivers newspaper in his town and earns an amount represented by a linear equation,

y = 30x + 18

Here, y = total earnings

x = number of houses he delivers the newspaper

If he doesn't deliver any newspaper on a certain day, (x = 0)

Then total earnings, y = 30(0) + 18

y = 18 cents

Therefore, a certain amount of 18 cents will be paid even if he doesn't deliver any newspaper on a certain day.

Option (D) is the correct option.

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Agata [3.3K]

Answer:

55,000

Step-by-step explanation:

I already explained it on another problem but I'll show the equation again.

0.74x = 40,700

x = 55,000

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4 years ago

5. Which number is a perfect cube? <br> 7<br> 25<br> 66<br> 27

Veseljchak [2.6K]

The answer is 27 because the cubed root is 3

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3 years ago

Read 2 more answers

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

Question 1 (1 point)

Naily [24]

Answer:

P ( -1, -3)

Step-by-step explanation:

Given ratio is AP : PB = 3 : 2 = m : n and points A(5,6) B(-5,-9)

We will calculate coordinates of the point P which divides line segment AB in the following way:

xp = (n · xa + m · xb) / (m+n) = (2 · 5 + 3 · (-5)) / (3+2) = (10-15) / 5 = -5/5 = -1

xp = -1

yp = (n · ya + m · yb) / (m+n) = (2 · 6 + 3 · (-9)) / (3+2) = (12-27) / 5 = -15/5 = -3

yp = -3

Point P( -1, -3)

8 0

3 years ago

Which of the following BEST summarizes how to use the multiplication property of equality to isolate the

borishaifa [10]

Answer:

A. divide only on the right side of the equation by 2.

Step-by-step explanation:

I took the test yesterday and I got it hope this helps.

7 0

3 years ago

Help help help help help pls​

Help help help help help pls