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kherson [118]
3 years ago
8

Please help me ill put the question up for a lot of point, and i will mark as brainliest!!!

Mathematics
1 answer:
sattari [20]3 years ago
6 0

Step-by-step explanation:

(2x³y^-4)^-2 = 1/(4x⁶y^‐8) = y⁸/(4x⁶)

1/(8x⁵y^-7) = y⁷/(8x⁵)

4x^-9y⁴ = 4y⁴/x⁹

so, the whole expression is then

y⁸/(4x⁶) × y⁷/(8x⁵) × 4y⁴/x⁹

4y¹⁹/(32x²⁰) = y¹⁹/(8x²⁰)

so, D is the correct answer.

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You estimate that there are 45 marbles in a jar. The actual amount is 82 marbles. Find the percent error. Round to the nearest t
Nataly_w [17]

Answer:

45.1

Step-by-step explanation:

The original amount is 82

But the wrong amount is 45

So we will have to calculate the percentage for the error

82-45

37

So %error= 37/82 ×100

=3700/82

=45.121~45.1( to nearest tenth)

So the final answer is 45.1%

6 0
4 years ago
Urgent help, please!...
liq [111]
P(B) =2X0. 28=0.56
1-0.28-0.56=0.16
P(C)+P(D)=0.16
P(D)=0.16÷2=0.08
7 0
3 years ago
An empty box weighs 200g the box is filled with birthday party goozy bags and now weighs 6.2kg Each goody bag weighs 150Work out
otez555 [7]
For this case, the first thing we are going to do is define variables.
 We have then:
 x: number of birthday party goozy bags
 y: total weight
 We then have the following equation:
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 For y = 6200 we have:
 6200 = 150x + 200
 Clearing x:
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there are 40 goody bags inside the box
5 0
3 years ago
An isosceles triangle has an angle that measures 100°. Which other angles could be in that isosceles triangle
slava [35]
Angles in a traingle always add up to 180°. in an isosceles triangle, 2 of the angles are the same, so if one angle is 100°, the other 2 must be 180-100=80/2=40
the other 2 angles would be 40° and 40°
8 0
4 years ago
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Multiply the radius times pi.<br> 5. A circle has a diameter of 8.2 inches. Find its circumference?
mash [69]
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6 0
4 years ago
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