Answer:
-6 because I did it on my calculator
Answer:
The two numbers can be -12 and 11, or 11 and -12.
Step-by-step explanation:
xy=-132
x+y=-1
-------------
x=-1-y
(-1-y)y=-132
-y-y^2=-132
-y^2-y-(-132)=0
-y^2-y+132=0
y^2+y-132=0
factor out the trinomial,
(y-11)(y+12)=0
zero property,
y-11=0, y+12=0,
y=0+11=11,
y=0-12=-12
x+11=-1 & x+(-12)=-1
x=-1-11=-12
x=-1-(-12)=-1+12=11
Not sure how to give a hint without blatantly giving the answer but...
Consider an n - digit number in base b.
That is N=an−1an−2.....a0=∑k=0akbk
N
=
a
n
−
1
a
n
−
2
.
.
.
.
.
a
0
=
∑
k
=
0
a
k
b
k
Note aka
k
<
b
so we can easily show NN
<
b
n
(may have to repeat and argue inductively.
And presumably to be n - digit than an−1≠0
a
n
−
1
≠
0
so N≥bn−1
N
≥
b
n
−
1
.
So we have: every n digit number is between bn−1
b
n
−
1
inclusively and bn
b
n
exclusively. This should be blindingly obvious to us if b=10
b
=
10
.
So... that's a really important and fundamental result. Remember and use it.
A line with a negative slope is a line that is trending downward from left to right. In other words, the line's rise to run ratio is a negative value. Negative slope line. In this image, the car is driving down a hill that has a negative slope.
Explicación paso a paso:
Para el celular:
Número total de teléfonos móviles registrados antes del terremoto = 1354 teléfonos móviles
Número total de teléfonos móviles registrados después del terremoto = 571+ 28 = 599 teléfonos móviles
<em>Número total de teléfonos móviles en el almacén después del terremoto = 1354 + 599 = 1953 teléfonos móviles.
</em>
<em>
</em>
Para la tableta:
Número total de tabletas registradas antes del terremoto = 1586 teléfonos móviles
Número total de tabletas registradas después del terremoto = 942 + 45 = 987 teléfonos móviles
<em>Número total de tabletas en el almacén después del terremoto = 1586 + 987 = 2573 tabletas.</em>
