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VashaNatasha [74]
3 years ago
8

What’s the correct answer for this?

Mathematics
1 answer:
Alexxx [7]3 years ago
3 0

Answer:

the answer is the top choice

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Use the change of variables s=x+3y, t=y to find the area of the ellipse x2+6xy+10y2≤1.
MArishka [77]

t=y\implies s=x+3t\implies x=s-3t

Then

x^2+6xy+10y^2=(s-3t)^2+6(s-3t)t+10t^2=s^2+t^2\le1

which is a disk of radius 1, hence with area \pi.

5 0
3 years ago
It would take 150 minutes to fill a swimming pool with 5 taps.
sammy [17]

First 150 min times by 5 = 750 minutes after that 750 ÷3=250 minutes it will take for 3 taps

6 0
3 years ago
Farmer Tom can grow potatoes, cabbages, or cauliflower on his land. However, he has decided to grow only potatoes. What is Farme
Alchen [17]
Growing crops for spring, Winter, Summer or Fall. 
3 0
2 years ago
I don’t understand this problem and need help!
butalik [34]

Answer:

see explanation

Step-by-step explanation:

Since AB and BC are perpendicular, then

∠ABC = 90° and

∠ABD + ∠DBC = ∠ABC ← substitute values

3r + 5 + 5r - 27 = 90, that is

8r - 22 = 90 ( add 22 to both sides )

8r = 112 ( divide both sides by 8 )

r = 14

Hence

∠ABD = 3r + 5 = (3 × 14) + 5 = 42 + 5 = 47°

∠DBC = 5r - 27 = (5 × 14) - 27 = 70 - 27 = 43°

7 0
3 years ago
Which statements are true about the estimation of decimal products?
Tamiku [17]

Answer:

option A, Estimation gives an approximate answer

3 0
3 years ago
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