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Fynjy0 [20]
3 years ago
12

Help with these math exercises, please!

Mathematics
1 answer:
lions [1.4K]3 years ago
4 0
1) (3-x) x (3+x)

2) 5(5-x) x (5+x)

3) (3v-wy) x (3v+wy)

4) 2(k-m) x (k+m) x (k^2+m^2)

5) (ab-4c) x (ab+4c)

Brainliest?
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PLEASE HELP with this Geometry question
Gnoma [55]

Step-by-step explanation:

DE = 5x-2

DF = 3(x+3)

3(x+3) = 3 + 5x-2

3x+9= 5x+1

2x=8

x=4

DE=5×4-2=18

DE=18

3 0
3 years ago
The surface area, A, of a cylinder is given by the formula A = 2 Trh + 2nr, where ris the radius and h is the height
lord [1]

Answer:

Area = 87.9646  sq. units  from A = 28*π  sq. units.

However I cannot see this in your answer list, since the numbers look all jumbled.  Choice A. looks close to it, since there is a 28...

Step-by-step explanation:

We have a cylinder with height h = 5

radius = 2

We want the surface area of this cylinder.

A = (circumference)*h  + 2*(pi)*r^2

A = ( 4*π)*5   + 2*π*(2^2)

A = 20π + 8π  =  28 π   square units

A = 87.9646 sq.. units

7 0
3 years ago
Fitz and 3 friends are at the amusement park. Each person buys a pretzel for $4, cotton candy for $3, and a drink for $1. Write
Musya8 [376]
4x+3x+1x=t, where x represents the number of people, and t represents the total cost.

So to solve it, it says Fitz and 3 friends so that’s four people, you’d substitute x for 4.


I hope this helps!
5 0
3 years ago
the cost to buy a sweater at sweaterfactory.com is 19 with free shipping i have 50 dollars creat an inequality to represent how
pychu [463]

Answer:

34

Step-by-step explanation:

5 0
3 years ago
Write y= -x +3 in standard form. then graph the function
pantera1 [17]

Answer:

x+y=3;  graph is in word doc

Step-by-step explanation:

Download docx
5 0
3 years ago
Read 2 more answers
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