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Alex17521 [72]
3 years ago
11

I need help! I don't really understand.... Can someone help for these 2 questions?? Part A and B??

Mathematics
1 answer:
vfiekz [6]3 years ago
8 0

Answer:

A. 6x + 4

B. 22 cm

Step-by-step explanation:

The perimeter of the triangle is equal to the sum of all the side lengths, which is (2x+3) + (x+1) + (3x), or 6x + 4.

When x = 3cm, the perimeter is 6(3) + 4, which is 22 cm.

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2.8 ÷ -0.004. Please show work.
Alexeev081 [22]

Answer:

<h3>-700</h3>

Step-by-step explanation:

\frac{2.8}{-0.004}\\\\\mathrm{Apply\:the\:fraction\:rule}:\quad \frac{a}{-b}=-\frac{a}{b}\\\\=-\frac{2.8}{0.004}\\\\\mathrm{Divide\:the\:numbers:}\:\frac{2.8}{0.004}=700\\\\=-700

5 0
3 years ago
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What are the steps to converting 720 seconds into hours?
Nataly [62]
This conversion<span> of </span>720 seconds<span> to </span>hours<span> has been calculated by multiplying </span>720 seconds<span> by 0.0002 and the result is 0.2 </span>hours<span>.</span>
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3 years ago
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Mason has a checking account. The bank charges 65¢ for each debit card transaction, 30¢ for each check he writes, and $2.50 for
Digiron [165]

Because Mason tried to balance $2.50 in is check register

hope that helps you

7 0
3 years ago
On a trip, a motorist drove 150 miles in the morning and 50 miles in the afternoon. His average rate in the morning was twice hi
Lina20 [59]

Answer:

Morning's average rate = 50 mph, and Afternoon's average rate = 25 mph.

Step-by-step explanation:

Suppose he drove 150 miles for X hours, then his average rate in the morning was (150/X) mph.

Given that he spent 5 hours in driving.

And he drove 50 miles for (5-X) hours, then his average rate in the afternoon was 50/(5-X) mph.

Given that his average rate in the morning was twice his average rate in the afternoon.

(150/x) = 2 * 50/(5-x)

150/x = 100/(5-x)

Cross multiplying terms, we get:-

150*(5-x) = 100*x

750 - 150x = 100x

750 = 100x + 150x

750 = 250x

x = 750/250 = 3.

It means he spent 3 hours in the morning and 2 hours in the afternoon.

So morning's average rate = 150/3 = 50 mph.

and afternoon's average rate = 50/(5-3) = 25 mph.

8 0
3 years ago
Find the perimeter of rectangle PQRS with vertices P(0,0), Q(0,7), R(12,7) &amp; S (12,0).
Andrews [41]
Check the picture below.

you can pretty much just count the units off the grid.

the perimeter is the length of all sides summed up.

7 0
3 years ago
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