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mina [271]
3 years ago
9

There are 80 students in the 7th grade. 25% of them were absent yesterday. How many

Mathematics
1 answer:
mariarad [96]3 years ago
7 0
I can show you one way. Since 25x4=100 we can start by dividing 80/4. Which gives you 20.
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Ivan

Answer:

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Step-by-step explanation:

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3 years ago
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3.x2 + 4x + 5 for x = -2<br>please help asap​
Law Incorporation [45]
Your equation is a little messed up comment me the equation you need help with
8 0
3 years ago
Dave has $8000 to invest for 15 years. He finds a bank that offers an interest rate of 3.1% compounded monthly. How much money w
ioda

Dave will have $12,728 after 15 years, if he has $8000 to invest for 15 years. He finds a bank that offers an interest rate of 3.1% compounded monthly.

Step-by-step explanation:

The given is,

                 Investment = $ 8000

               No. of years = 15 years

             Interest rate, i = 3.1 %

                 ( compounded monthly )  

Step:1

          For for calculating future value with compound interest monthly,

                                     A = P (1 +\frac{r}{n})^{nt}.................(1)

         Where,

                     A = Future amount

                     P = Initial investment

                     r = Rate of interest

                    n = Number of compounding in a year

                     t = Time period

Step:2

           From given values,

                           P = $8000

                            r =  3.1%

                            t = 15 years

                            n = 12 ( for monthly)

           Equation (1) becomes,

                          A = 8000( 1+\frac{0.031}{12} )^{(12)(15)}

                              = 8000 (1+0.002583)^{180}

                              = 8000(1.002583)^{180}

                              = 8000(1.591059)

                              =12728.48

                           A = $ 12728.48

Result:

           Dave will have $12,728 after 15 years, if he has $8000 to invest for 15 years. He finds a bank that offers an interest rate of 3.1% compounded monthly.

                             

       

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3 years ago
Does 8 + 2(x−6) = −2 + 2x −2 have one solution, no solutions, or infinite solutions.
tia_tia [17]

Answer:

Infinite solutions

Step-by-step explanation:

All solutions are possible.

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A student solved the equation 2x+6=12 using algebra tiles. incorrectly says the solution is 9. Solve the equation. What mistake
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Instead of subtracting 6 from 12 then dividing they added 6 to 12 & ended up with 18. 18 by 2 is 9.
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