Which of the following check all that apply

Answers

Answer 1

Answer:

Answer:

.............

Step-by-step explanation:

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The science fair judges will be science teachers. Each judge will only have time to view 5 science fair projects. There are 133 science teachers. What is the fewest number of volunteers needed to have enough judges for all of the projects

Answers

there will need to 27 science teachers

The question asks to simplify the following (imagine as fraction form / sign stands for fraction form)a+6/c/2a+6/2c

Answers

$a+\frac{\frac{6}c}{2a}+(6)/(2c)\n\n=a+\frac{\frac{6}a}{2c}+(6)/(2c)\n\n=a+\frac{6\left(1+\frac{1}a\right)}{2c}\n\n\boxed{a+\frac{\frac{6}c}{2a}+(6)/(2c)=a+\frac{3\left(1+\frac{1}a\right)}{c}}$

Start watching tv at 1:20. Stopped watching at 4:05. how long did she spend watching TV?

Answers

The person spent 2 hours and 45 minutes watching TV. I know this because from 1:20 to 3:20 is two hours and then you do 60 - 20 which gives you 40 and you add that to 5.

The person watches 2 hours and 45 minutes of tv

1:20
2:20--------1 Hour
3:20--------2 Hours
4:05-------- 45 Minutes

Each adult paid 75 cents and each student paid 50 cents at the schoot play. A total of 750 attended. How many adults attended if the receipts totaled $437.50?

Answers

Answer:

250 adults

Step-by-step explanation:

With the information of the problem we have a system of two linear equations:

$x+y=750$

$0.75x+0.50y=437.50$

Where x represent the quantity of adults and y represent the student. Solving the first equation for x we have:

$x+y=750\nx=750-y$

Using this result in the second equation:

$0.75x+0.50y=437.50\n0.75(750-y)+0.50y=437.50\n562.5-0.75y+0.50y=437.50\n-0.25y=437.50-562.5\n-0.25y=-125\n0.25y=125\ny=(125)/(0.25)\ny=500$

With this result we know that we have 500 students, using the result of y in the first equation we will find the answer for x then:

$x+y=750\nx+500=750\nx=750-500\nx=250$

Then the we have 250 adults.

Simplify negative 3 over 2 / 9 over 6

Answers

$\mathrm{Simplify} -\frac{3}2/\frac{9}6.$

Dividing by a fraction is the same as multiplying by its reciprocal. (flipped version)

$-\frac{3}2/\frac{9}6=-\frac{3}2*(6)/(9)$

6 and 9 are both divisible by 3, so we can simplify 6/9 = 2/3.

$-\frac{3}2*\frac{2}3$

We can multiply across right now, but we might as well cross cancel.
Look at the numbers diagonal from one another...-3 and 3 are both divisible by 3, so we can change them to -1 and 1...2 and 2 are both divisible by 2, so we can change them to 1 and 1...

$-\frac{1}1*\frac{1}1$

Any fraction over 1 can just be expressed as a whole number.

$-1*1$

Our final answer... $-\frac{3}2/\frac{9}6=\boxed{-1}$

If you were to multiply across, (maybe you don't like cross cancelling, idk?) you'd get the same answer, of course.

$-\frac{3}2*\frac{2}3=-\frac{6}6=\boxed{-1}$

Answer:

−1

Step-by-step explanation:

I took the test and got it correct

Find the valu of x and y

Answers

Answer:

x=63; y=27

Step-by-step explanation:

The straight line of the 117 is 180 and so you subtract 180 to 117 to get 63 which is x and then subtract 90 and 63 to get 27.

Answer:
x= 63
y= 27

Working out:
x : 180-117=63
y : 90-63=27

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