Q.1 x-2/5=7
divide -2/5 which is -0.40
x-0.40=7. Move -0.40 to the right side of the equal sign and that becomes +0.40
x=7+0.40 . 7+0.40 is 7.4
x=7.4
Q.2 2.1r=6.174
divide 2.1 by both sides which 2.1r divided by 2.1 is 1r and 6.174 divided by 2.1 is 2.94
r=2.94
Q.3
equation: 2/3 = 32 2/3 d
Q.4 x9=3/5
3/5 is 0.60
x9=0.60
divide 9 by both sides. 9x divided by 9 is 1x and 0.60/9 is
0.0
6666 (the 6 is continuing)
x=0.06666
Q.5
x=-3
Q.6
7.25 =0.5x
divide 0.5 by both sides. 0.5x divided by 0.5 is 1x and 7.25 divided by
0.5 is 14.5
x=14.5
Q.7
the expression: 7-9m
Q.8
answer is C
Q.9
(x2) + (10(2))
For this case you can solve the problem by a simple rule of three:
72 ---> 100%
x ---> 30%
Clearing x we have:
x = (30/100) * (72) = 21.6 $
Then, we must subtract this value from the original price:
72-21.6 = 50.4 $
answer:
Gabriela pays $ 50.4 with the discount
Answer:
$66
Step-by-step explanation:
Let the money that you started off with be called x.
You spend $62 on a game: x-62
You receive $50 for painting a fence: x-62+50 = x-12
You give $10 to your friend: x-12-10 = x-22
You have $44 left: x-22=44, x=44+22=66
Answer:
It is not ''significant''
Step-by-step explanation:
Let's call the event
A : ''Answer a question correctly if a random guess is made''
Now we calculate the probability for the event A
In the exercise A occurs in only one way and the total cases are the number of possible answers
An event B is ''significant'' if
⇒A it is not a ''significant'' event
Answer:
Fourth option: y = 2/5x - 3
Step-by-step explanation:
it is perpendicular :)