Answer:
50
Step-by-step explanation:
X+52+78=180
X+52+78=180
-78 -78
X+52+0= 102
X+52=102
-52 -52
X+0= 50
X=50
To find what X is equal to it's process of elimination.
You know X plus the numbers gives you the answer so subtracting those same numbers from your answer will give you X.
You have to mKe sure you do the same thing to both sides of the equations though.
Let's say
X+3=5
To find X you need to single X out on it's side of the equation.
To single X out you want to nullify anything acting on X by doing the opposite the opposite of positive 3 is negative 3... so
X+3= 5
-3 -3
We add negative 3 to each side of the equation to nullify the 3 on the X side.
We are left with
X=2
Answer:
volume = area of rectangle × height
= (x × x ) × 1/2x
= x² × 1/2x
= 1/2x³
the answer is the first option
If y is the normal number of sweets then the normal number plus 40% equals 42.
y + .4y = 42
1.4y = 42
y = 42/1.4 = 30 .
Hope this helps!
88 words 1 min
_______ _______
1 min 60 sec
88 × 1≈88 88 44
1 × 60≈60 ______ <---- simplify (÷by 2) _____ <---- simply again (÷by 2)
60 30
22
_____ divide both numbers (22÷15) ≈ 1.46666667 ( round to the
15 nearest hundredth: 1.467
1.467 words per second
i think ;)
Answer:
true
Step-by-step explanation:
given
= ( cross- multiply )
4x = 40 ( divide both sides by 4)
x = 10