The left endpoint is x = 4, but we don't include this endpoint because of the open hole. We use a parenthesis to indicate "don't include the endpoint"

The right endpoint is positive infinity. We always use a parenthesis with either infinity since we cannot reach infinity

The interval from 4 to infinity is written as $(4, \infty)$ which is like saying $4 < x < \infty$

7 0

3 years ago

Pls help meee!!

maksim [4K]

Answer:

7*6-x

42-x

Step-by-step explanation:

decrease means subtraction,

product means multiplication

let x be the number you are decreasing by.

I am not really sure how to explain this, but here I go.

you take away x from the number that equals 6*7.

6*7 is 42 and you take away x from that, you get 42-x

or if you want to leave it unsimplified,

6*7-x

8 0

3 years ago

Please answer this im so confused

-Dominant- [34]

Step-by-step explanation:

Since,in question 21 the trspezium is an isoseles tapizium
therefore,9x-17=4x+28
5x=45
x=9
therefore q=9x-17
=9*9-17
=81-17
q=64
therefore 2t=360-128(since its isoseles triangle therefore adjacent base angles are equal)
2t=23
t=116

In question 28

2(K+M)=360
2(3x+16 + 11x-18)=360
2(14x-2)=360
28x-4=360
28x=364
x=13
J=K
Isoleses angles are equal
3x+16=J
39+16=J
J=55

In question 29

Bd=Ec (Congeruent sides of congurent trisnle are equal,BED~=CDE)
8x-27=2x+33
6x=60
x=10
Therefore,Bd=8x-27
Bd=80-27
Bd=53

4 0

3 years ago