Answer:
20
Step-by-step explanation:
Given function f(x)=![\[x^{2}-x\]](https://tex.z-dn.net/?f=%5C%5Bx%5E%7B2%7D-x%5C%5D)
We need to find f(-4) which means we need to find the value of the function when x=-4
.
On substituting x=-4 in the given function:
f(-4)=![\[-4^{2}-(-4)\]](https://tex.z-dn.net/?f=%5C%5B-4%5E%7B2%7D-%28-4%29%5C%5D)
Square of -4 is 16.
Hence, f(-4)=![\[16+4\]](https://tex.z-dn.net/?f=%5C%5B16%2B4%5C%5D)
=
Hence the value of the given function f(x)=
when x=-4 is 20.
Answer:
surface area of cube
time
Step-by-step explanation:
given data
new volume = 10 time original volume
to find out
what factor surface area change
solution
we consider here side of cube is a
and volume is V
we consider here a is 2
then volume will be v1 = a³ = 2³ = 8
and surface area = 6a² = 6(2)² = 24 ..........1
so if volume increase 10 time
than
V = 10 × v1
a³ = 10 × 8
a³= 80
a = 2 × ∛10
and
surface area increase here
surface area = 6a²
surface area = 6( 2 × ∛10 )²
surface area = 24 ×
............2
so from equation 1 and 2
surface area / surface area = 24 ×
/ 24
surface area = 
so here surface area of cube will be
time
Answer:
x^2-x+3 (r -2)
Step-by-step explanation:
x^3+2x^2+7 / x+3
-3 | 1 2 0 7
-3 3 -9
_________
1 -1 3 -2
This means x^2-x+3 with a remainder of -2
Answer:
61
Step-by-step explanation:
- 13 - 1 = 12
- 12 ÷ 2 = 6
- Put 6 and 1 together: 61
Therefore, the number is 61
Let's check:
- 6 × 2 = 12
- 12 + 1 = 13
The sum of the two digits is 13, and we got that, so we are correct. The number is 61.