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Marizza181 [45]
2 years ago
14

Expand & simplify (3x-4)^2 - (x+1)(x-1) Please anyone? I'm really bad at maths-

Mathematics
1 answer:
Mnenie [13.5K]2 years ago
5 0
The answer would be 8x^2-24x+17
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Write the<br> equation of a<br> line that is<br> vertical and<br> goes through<br> the point (4,-2)
attashe74 [19]

Answer:

x = 4

Step-by-step explanation:

6 0
2 years ago
Choose the pair(s) of integers that can be substituted into the equation ax2 - 6x + c = 0 so that it has two real solutions.
Maksim231197 [3]

The options are not provided, but method is stated below

Answer:

Quadratic equation ax2 - 6x + c = 0

options would be given for a and c

  1. substitute a and c
  2. check for Discriminant
  3.  b^2 - 4ac \geq  0
  4. 36 -4ac \geq 0

These conditions will fetch us the result required among the options.

Note : the \geq sign will give us the result for Two real unequal solutions and two real equal solutions.  If we only need Real unequal solutions we only use > sign instead of \geq

4 0
2 years ago
The area of a rectangular field is 2275 m2. The field is enclosed by 200 m of fence. What are the dimensions of the field?
AURORKA [14]
So it is enclosed by 200 m of  fence
perimiter=200 m
it is a rectangle to
p=legnth+legnth+width+width or
p=l+l+w+w or
p=2l+2w or
p=2(l+w)
so
p=200
200=2(l+w)
divide both sides by 2
100=l+w
area=l times w
area=2275
lw=2275
l+w=100
combine and solve
l+w=100
subtract w
l=100-w
subisutute 100-w for l in other eqution
(100-w)(w)=2275
distribute
-w^2+100w=2275
add (w^2-100w) to both sides
0=w^2-100w+2275
factor
find what 2 numbers add up to -100 and multiply to get 2275
guess (or factor 2275 and find factors that add up to -100)
figure out that they are -65 and -35
0=(w-65)(w-35)
set each to zero
0=w-65
0=w-35

solve for w
w=65 or 35
65>35 so
65 m=legnth
35 m=width
 
4 0
3 years ago
Thirty subtracted from four times a number is greater than the opposite of 10
Arada [10]


30-4x>-10 

Hope I helped

5 0
3 years ago
A school district had four elementary schools to start the year. North Elementary School had 1,200 students, East Elementary Sch
kobusy [5.1K]

Answer:

C

Step-by-step explanation:

Add all the schools together, then divide by 5

5805/5

6 0
3 years ago
Read 2 more answers
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