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Bezzdna [24]
3 years ago
6

HELP PLS I NEED TO TURN IT IN MONDAY!

Mathematics
1 answer:
AnnyKZ [126]3 years ago
6 0

Terri can swim 3 laps in 2.5 minutes. To find how long it takes to swim 20 laps, you can make a proportion.

\frac{Lap}{Time}

Put the amount of laps on the top and the time(minutes) at the bottom.

\frac{3}{2.5} = \frac{20}{x}

Cross multiply:

20 \times 2.5 = 50

Divide by 3:

50 \div 3 = 16 \frac{2}{3} \rightarrow 16.67

It would take Terri 16 \frac{2}{3} OR 16.67 minutes to run 20 laps.

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Ramon earns $1,780 each month and pays $53.30 on electricity. To the nearest tenth of a percent, what percent of Ramon's earning
Elis [28]

Answer:

  • 3.0%

Step-by-step explanation:

  • Ramon earns $1,780
  • Ramon pays $53.30 on electricity

<u>$53.30 of $1780 is:</u>

  • 53.30/1780*100% = 2.9943% = 3.0% rounded
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3 years ago
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Which expression shows 0.95 in expanded form?
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Solve for x <br><br> 2x-20=450
Pachacha [2.7K]

2x-20=450

2x=450+20

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x=235

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3 years ago
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Find the surface area of this net.
Elden [556K]

Answer:

<h2>231cm²</h2>

Step-by-step explanation:

First, let's find the surface area of both the triangles

5x3=15

So, the surface area of the triangles is 15 sq.cm

Now, let's find the surface area of the base (large rectangle in the middle)

12x8=?

10x8=80

2x8=16

80+16=96

12x8=96

So, the surface area of the base, is 96sq.cm

Now, let's find the surface area of both of the side rectangles

12x5=60

60x2=120

So, the surface area of the two side rectangles is 120sq.cm

Now, let's find the total surface area by adding all of our answers.

120+96=216

216+15=231

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3 0
2 years ago
PLSSSSS HELLLLLLP!!!!!
Lapatulllka [165]

Answer:

\frac{3n^2-7n+15}{(n+3)(n-4)} will be the answer.

Step-by-step explanation:

The given expression is,

\frac{3n}{(n+3)}+\frac{5}{(n-4)}

By solving this expression,

\frac{3n}{(n+3)}+\frac{5}{(n-4)}

= \frac{3n(n-4)}{(n+3)(n-4)}+\frac{5(n+3)}{(n+3)(n-4)}

= \frac{3n(n-4)+5(n+3)}{(n+3)(n-4)}

= \frac{3n^2-12n+5n+15}{(n+3)(n-4)}

= \frac{3n^2-7n+15}{(n+3)(n-4)}

Therefore, fraction given in option (2) will be the answer.

4 0
3 years ago
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