Step-by-step explanation:
the value of x = 5 and the value of y = 4
Answer:
It’s 4x+y3
Step-by-step explanation:
Which equal x+y
Let's say make the shapes, some variable name
say
⛁ ⚪ ◽ ▯
a b c d
so.. if take those are the shapes provided
then we can take a look at the first set and we can say that
2a + b + c = 20
a + 4d + b = 19
a + c = 9
3c + d + a = 19
thus

and surely you can find the other two
Answer:
(B)-x-(-x) =0
Step-by-step explanation:
<u>Option A</u>
Our equation is: -x +0+(- x) = 0
Left Hand Side:
-x +0+(- x) = -x-x=-2x

<u>Option B</u>
Our equation is: -x-(-x) =0
Left Hand Side:
-x-(-x) =-x+x=0

Therefore, the equation in Option B is true.
Answer:
see below
Step-by-step explanation:
The equation to determine the work time is
1/a+1/b = 1/c where a and b are the times alone and c is the time together
1/80 + 1/30 = 1/c
Multiply by the least common denominator to clear the fractions, which is 240c
240c(1/80 + 1/30 = 1/c)
3c+8c = 240
11c = 240
Divide by 11
11c/11 =240/11
c = 240/11 minutes
c=21.81818
Approximately 22 minutes