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Orlov [11]
3 years ago
13

Please help me! 20 points! [Inequalities Review]

Mathematics
2 answers:
kenny6666 [7]3 years ago
8 0

Answer:

x<-3

x=>-5

Step-by-step explanation:

I think this is right... I haven't done inequalities in several years

Nadusha1986 [10]3 years ago
3 0

Answer:

top is correct byereeeeeeeeee

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Lines c and d are parallel in this diagram
ahrayia [7]
The answer is 39 degrees.
6 0
4 years ago
Evaluate the expression b2- 15 if b=9
Rudiy27

Answer:

3

Step-by-step explanation:

just plug in 9 to b

9x2=18 18-15=3

4 0
3 years ago
Read 2 more answers
PLEASE HELP:
Gnom [1K]
15 mi/h= 15mi/60 min= 1/4 (mi/min)

x is  original speed (mi/min)
t  is original time
x*t =260

(x+1/4)=5x/4  is new speed
t-20 - new time
(x+1/4)(t-20)=260

xt = (x+1/4)(t-20)
xt=xt + t/4 - 20x - 5
t/4=20x+5
t=80x +20 

We can substitute t=80x +20 into equation x*t =260
x*(80x+20)=260
80x²+20x-260=0 
4x²+x-13=0

D=b² - 4ac = 1+4*4*13= 209
x=(-1+/-√209)/2*4
x=1.68 mi/min

1.68mi/min * 60 min/1h≈100 mi/h

Check
260/100=2.6h time with old speed
260/(115)=2.26 h time with new speed
2.6-2.26 = 0.34 h difference between old and new time 
0.34h*60min/1h≈20 min difference between old and new time in minutes


6 0
3 years ago
Suppose that the area of a square is eight times its perimeter. find the length of a side of the square.
11Alexandr11 [23.1K]
We Know, perimeter of square = 4a
Area of square = a²

Now, A.T.Q, 
8*4a = a²
32a = a²
a²/a = 32
a = 32

So, side should be 32

Hope this helps!
8 0
4 years ago
What is the decimal equivalent for 3/10?
Artyom0805 [142]
The decimal equivalent of 3/10 is .3
5 0
3 years ago
Read 2 more answers
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