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2 years ago

I NEED HELP ON 9 and 10

Mathematics

1 answer:

myrzilka [38]2 years ago

3 0

9) is A
10) is B
Do you need an explanation

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The area of triangle ABC is __ square units.

shutvik [7]

Answer:

17.5

Step-by-step explanation:

(7)*(5)*(.5)= 17.5

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3 years ago

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7x-3=-3+7x show your work

Nuetrik [128]

So what you need to do is to put X alone so what you do is +3 on both sides so only 7x=7x is left. then do the opposite and divide 7 with 7 you get 1x thats your answer

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3 years ago

Batman can clean up all of the crime in Gotham City in 8 hours working alone. Robin can do the same job alone in 12 hours. If Ro

scoray [572]

<h2>The crime gets cleaned up at 2:00 PM</h2>

Step-by-step explanation:

Let the work be w.

Batman can clean up all of the crime in Gotham City in 8 hours working alone.

$\texttt{Rate of batman,}r_b=\frac{W}{8}$

Robin can do the same job alone in 12 hours.

$\texttt{Rate of Robin,}r_r=\frac{W}{12}$

Robin starts work at 8:00 AM and Batman Joins at 10:00 AM.

Let the time of completion of work after Batman's joining be t.

We have time of working of Robin = t + 10:00 -8:00 = t + 2

$t\times \frac{W}{8}+(t+2)\times \frac{W}{12}=W\\\\12t+8t+16=96\\\\20t=80\\\\t=4hours$

After 4 hours of 10:00 Am work gets completed.

Time = 10:00 AM + 4 hours = 2:00 PM

The crime gets cleaned up at 2:00 PM

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3 years ago

Food bill before tax $62 Sales tax: 8% Tip: 15%<br> What is the tax?

professor190 [17]

<h3>Answer: $4.96</h3>

Work Shown:

8% = 8/100 = 0.08

8% of 62 = 0.08*62 = 4.96

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3 years ago

6 3/4 + 3 1/8 please whats the answer

Natalka [10]

Answer:

9 7/8 is the answer, hope this helps!

Step-by-step explanation:

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