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ELEN [110]
3 years ago
8

PLEASE HELP!!!!!! ILL GIVE BRAINLIEST *EXTRA 40 POINTS** !! DONT SKIP :((

Mathematics
2 answers:
Serga [27]3 years ago
7 0

Answer:

Yes it is my friend plz

Mashutka [201]3 years ago
5 0

Step-by-step explanation:

i'm doing this too

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Your class can fit no more than 20 students. Write an inequality that best fits this situation.
Wittaler [7]

Answer:

number-of-students \leq 20

x\leq 20

8 0
3 years ago
Find the surface area of each figure pls 7-10
Vlad [161]

Answer:

7) 42 inches^{2}

8) 358 meters^{2}

9) 320 yards^{2}

10) 288 miles^{2}

Step-by-step explanation:

Problems 7, 8, and 10 all use the same formula: the formula for the surface area of a rectangular prism.

Formula: 2 * (lw + lh + hw)

where l = length, w = width and h = height

This is a condensed form of the sum lw + lw + lh + lh + hw + hw where each product is a face of the prism.

replace each variable in the formula above with the values given in your problems for 7, 8 and 10:

7) 2 * (3*3 + 3*2 + 2*3) = 2 * (9 + 6 + 6) = 2 (21) = 42

8) 2 * (12*7 +12*5 + 5*7) = 2 * (84 + 60 + 35) = 2(179) = 358

10) 2* (12*4 + 12*6 + 4*6) = 2 * (48 + 72 + 24) = 2(144) = 288

Now 9 is a little different, as it contains a regular pentagon. However it is not much different from the other problems as it is also a prism.

The formula for the area of any regular polygon can be in the form:

Area = \frac{1}{2}ap where the a stands for apothem (which is the distance from the center of a regular polygon to its side, in this case it is 5.5 yds) and the p is the perimeter of the polygon.

The reason for this formula involves the polygon being divided into as many congruent triangles as it has sides, but that is for another time : )

Given this formula for the area of the pentagon, you can substitute values:

Area = \frac{1}{2}(5.5)(number of sides * length of a side)

Area =  \frac{1}{2}(5.5)(5 * 8) = 110

And get that the area of the face is 110 yd^2

the rest of the faces are rather straightforward as they contain rectangles of sides 4 yds and 5 yds, and you would end up with 5 of them (for each side of the pentagon)

Therefore by adding up each of the bases and the sides, you should get:

110 + 110 + 20 + 20 + 20 + 20 + 20 = 320

Hope that helped : )

3 0
3 years ago
Graph y= 2x-2 with the domain (1,2,3)
Mamont248 [21]
Graph attached. 
To graph by hand find the values at 1 and 3 by plugging it into the original function and drawing a line between the two.
2(1)-2 = 0     Point  (1,0)
2(3)-2 = 4     Point  (3,4)


3 0
3 years ago
Explain what the slope of a linear relationship is.
Brums [2.3K]
The slope is the same as rate of change. In a linear graph, it is the change in y over the change in x.
8 0
3 years ago
Which Pairs are additive inverses?<br> a. 6,-(-6)<br> b. -7,7<br> c.-7,-7<br> d.7,7<br> e.6,-6
xz_007 [3.2K]

I was never sure of what the "additive inverse" is. 
So, just now, just for you, I went and looked it up.

The additive inverse of any number ' A ' is the number
that you need to ADD to A to get zero.  That's all !

So now, let's check out the choices:

a), 6, -(-6)

That second number, -(-6), is the same as +6 .
So the two numbers are the same.
Do you get zero when you add them up ?  No.

b). -7, 7
What do you get when you add -7 and 7 ?
You get zero.
So these ARE additive inverses.

c). -7, -7
What do you get when you add -7 to -7 ?
You get -14 .  That's not zero, so these
are NOT additive inverses.

d).  7, 7
What do you get when you add 7 to 7 ?
You get 14.  That's NOT zero, so these
are NOT additive inverses.

e).  6, -6
What do you get when you add 6 to -6 ?
You get zero.
So these ARE additive inverses.

What do we end up with from the list of choices:

a).,  c).,  and d). are NOT additive inverses.

b). and e). ARE additive inverses.

7 0
3 years ago
Read 2 more answers
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