Let's start from an assumption of the size of the pool<span>. From the pictures, we'll set it at ... So the space we have to </span>fill<span> with </span>pennies<span> is: ... the </span>penny<span> as square instead of circle to simplify the math, a single </span>penny takes<span> up: ... So it makes sense he has this </span>pool<span> full of chump change just to </span>swim<span> around in. 1k Views ...</span>
<h2><u>Answer</u>:-</h2>
1) -11 + <u>2</u><u>6</u> = 15
2) <u>2</u> - (-3) = 5
3) <u>1</u><u>1</u> + (-4) = 7
4) <u>5</u> + -8 = -3
5) -2 + <u>3</u> = 1
6) <u>8</u> - 12 = -4
Answer:
C.
Step-by-step explanation:
Base area = 9 × 13
= 117 square feet
Now
Volume of pyramid = (1/3)(A)(H)
= (1/3)(117)(30)
= 117 × 10
= 1170 cubic feet
Answer:
x can be 3, -3, i, or -i.
Step-by-step explanation:
If you can't find the factoring by looking at this, simplify the equation.
let
x
2
=
y
to make things easier to see
Now we have
y
2
−
8
y
−
9
=
0
See it now?
We can factor into
(
y
−
9
)
(
y
+
1
)
Now substitute back in
x
2
for
y
.
(
x
2
−
9
)
(
x
2
+
1
)
Since
(
x
2
−
9
)
is a difference of two squares,
(
x
−
3
)
(
x
+
3
)
Now we have
(
x
−
3
)
(
x
+
3
)
(
x
2
+
1
)
x can be 3, -3 for the first two parts
x
2
+
1
=
0
can become
x
2
=
−
1
Taking the positive and negative root means
x
=
±
√
−
1
Thus
x
=
±
i
in addition to 3 and -3.
