Answer:
x - 1.7 = 14
Step-by-step explanation:
Sarah thought of a number: x
Then she subtracted 1.7 FROM it: x - 1.7
and gets an answer if 14: x - 1.7 = 14
so the equation is x - 1.7 = 14
I think the answer would be 16 and 13
Answer:
xy=5
Step-by-step explanation:
from the question, y varies directly with x and y
Then y ∝ xy
If we introduce proportionality sign we have
y=r xy
Where r= proportionality constant
Then if we substitute the given values
y = 25 when r = 5.
We have
y=r xy
25=5xy
Divide both sides by 5
xy=25/5
xy=5
Hence, equation that models the statement is xy=5
For an sphere:
Diameter = (2) x (radius)
Radius = (1/2) x (diameter)
Surface area = (4) x (pi) x (radius)²
Volume = (4/3) x (pi) x (radius)³
Answer with explanation:
To prove: 
is divisible by 2 for any whole value o<em>f a</em>.
Consider ![a^2-a=a(a-1) \ \ \ \ [\text{ Taking 'a' out as common }]](https://tex.z-dn.net/?f=a%5E2-a%3Da%28a-1%29%20%20%20%5C%20%5C%20%5C%20%5C%20%5B%5Ctext%7B%20Taking%20%27a%27%20out%20as%20common%20%7D%5D)
Here, a and (a-1) are two consecutive numbers such that,
either of them must be an odd number and an even number.
i.e. a(a-1)= Product of even and an odd number = Even number [Trivial statement]
⇒ a(a-1) is divisible by 2 [Every even number is divisible by 2.]
⇒ is divisible by 2 for any whole value o<em>f a</em>.
Hence proved.
