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olganol [36]
3 years ago
14

Expand & simplify(9x - y) (9x + y)​

Mathematics
1 answer:
grandymaker [24]3 years ago
5 0

Answer:

81x^{2}- y^{2} this is the answer

Step-by-step explanation:

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A square base a side length of x+3. What is its area
zepelin [54]
Well it would be (x+3)(x+3)
using the FOIL method you end up with:
x^2 + 6x + 9

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6 0
3 years ago
Helpppppp mathhh failing
LenKa [72]
Sin60 =b/10
<span>√3/2 = b/10
</span>b = <span>√3 / 2 (10)
</span>b = 5<span>√3
</span>
d^2  = 10^2 - (5√3)^2
d^2 = 100 - 75
d^2 = 25
d = 5

sin30 = b/a
1/2 = 5√3  / a

a = 5√3 (2)
a = 10√3

c^2 = (10√3)^2  -  (5√3)^2
c^2 = 300 - 75
c^2 = 225
c = 15

so
a =10√3,  b = 5√3, c = 15,d = 5
answer is
D. last choice

4 0
4 years ago
What is the area of this figure?
VashaNatasha [74]

Answer:

104cm^2

Step-by-step explanation:

Area of 1st rectangle

given

l=12cm

w=6cm

A =l×w

=12cm×6cm

=72cm^2

Area of 2nd rectangle

given

l=14-6=8cm

w=4cm

A=l×w

=8cm×4cm

=32cm^2

Total area =72cm^2+32cm^2=104cm^2

8 0
3 years ago
Read 2 more answers
Can someone help me find the slope
julia-pushkina [17]
The slope is rise over run so it would be -1/3
4 0
3 years ago
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nikklg [1K]

Answer:

<h2>A 50 HI PO SA FOR THE FIRST TIME IN MY LIFE AND </h2>
8 0
3 years ago
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