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3 years ago

Of a classroom filled with 20 students, 2 will be selected to stay after school and correct homework for extra credit. How

Mathematics

2 answers:

babymother [125]3 years ago

5 0

Answer:

10 pair

Step-by-step explanation:

20/2=10

10 pairs of students staying after school for extra credit

Tcecarenko [31]3 years ago

3 0

Answer: 10

Step-by-step explanation:

20/2=10

pairs of two

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The radius of a cylinder gift box is box is 3X +1 inches the height of the gift box is twice the radius what is the surface area

Genrish500 [490]

Answer:

The surface area of the gift box is = $A = \frac{1188}{7}x^{2}+ \frac{774}{7}x +\frac{132}{7}$

Step-by-step explanation:

The surface area of the cylinder can be calculated using this formula:

$A=2\pi rh+2\pi r^2$

in this case, r is not a number, but rather an expression, which is r = $3x +1$ .

The height of the gift box is twice the radius, which is h = $2(3x+1)= 6x+2$

To get our curved surface area, we carefully put the expressions for h and r into the equation.

$A = 2 \times \frac{22}{7} \times (3x+1) \times (6x+2) + 2 \times \frac{22}{7} \times (3x+1)^{2}$

$A = \frac{44}{7} (3x+1) \times (6x +2) + \frac{44}{7} (9x^{2} + 6x +1)\\A =\frac{132}{7}x + \frac{44}{7} \times (6x+2)+ \frac{396}{7}x^{2}+\frac{246}{7}x +\frac{44}{7}$

$A = \frac{792}{7}x^{2} +\frac{264}{7}x +\frac{264}{7}x + \frac{88}{7} + \frac{396}{7}x^{2} + \frac{246}{7}x + \frac{44}{7}$

$A = \frac{1188}{7}x^{2}+ \frac{774}{7}x +\frac{132}{7}$

The surface area of the gift box is = $A = \frac{1188}{7}x^{2}+ \frac{774}{7}x +\frac{132}{7}$

5 0

3 years ago

4. Find the length of Y<br> Find the missing angle marked "e"<br> 11.3<br> 129%<br> 5.91

Allushta [10]

Answer:

b 129%

Step-by-step explanation:

8 0

3 years ago

Kaitlin spent 2/3 of an hour on homework. Her sister, Judy, spent 1 1/2 times that amount. Explain why Judy's homework time is b

Andre45 [30]

Answer:

2/3 of 60 minutes = 40 Minutes for Kaitlin

Judy spends 1 1/2 times of Kaitlin = 60 Minutes

Step-by-step explanation:

Explain why Judy's homework time is between 2/3 of an hour and 1/2 hour? I have no idea what is meant by that?

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3 years ago

Write the number seven fifty -one with digits

NISA [10]

I’m guess you are looking for 751?

3 0

3 years ago

Read 2 more answers

Judy lives in central city, where the tax rate is 3.9%. her property is assessed at $82,000. what is her tax?

coldgirl [10]

Her tax is $3198.
3.9/100=0.039.
0.039*8200=$3198.

8 0

3 years ago