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ollegr [7]
3 years ago
5

I need help on this math question?​

Mathematics
1 answer:
Jet001 [13]3 years ago
8 0

Answer: D

Step-by-step explanation:

From the equation given ,  ( -3)⁰(2x⁻¹y⁻¹)²

Recall :From the laws of indicies,

x⁰  = 1  ,and (xᵃ)ᵇ = xᵃ ˣ ᵇ = xᵃᵇ. and x⁻¹ = 1/ₓ

Therefore,

(-3)⁰ = 1,

( 2x⁻¹y⁻1 )² = 2²x⁻¹ ˣ ²y⁻¹ x ²

                = 2²x⁻²y⁻²

                =4x⁻²y⁻²

Now going by the law above, the expression will be

                =4/ₓ²y²

So the answer is D

               

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Chuck bought 19 movie tickets for $174.50.
kap26 [50]

Answer:

45

Step-by-step explanation:

5 0
3 years ago
Two cards are chosen at random without replacement what is the probability of getting two aces
VARVARA [1.3K]
4/52 chance of getting an ace.
4 0
3 years ago
Please help ASAP for question b
zlopas [31]

Answer: The height of the new player is 210 cm

Step-by-step explanation: The previous mean of the entire team has been calculated as 200.3

What this means is that, we have a summation of the observed data and a summation of the frequency of data.

The mean was calculated as

Sum FX/Sum F = 200.3

Where Sum FX is 2604 and Sum F is 13

However, our calculation should now read thus,

Sum FX/Sum F = 201 {where 201 is the new mean}

By cross multiplication we now have

Sum FX = Sum F x 201

Remember that a new member has joined the team so our Sum F is now 14 and we can now express it as thus

Sum FX = 14 x 201

Sum FX = 2814

If the summation of the observed data after adding a new team member is now 2814, then the addition to the previous observed data would be

2814 - 2604 = 210

So the height of the new member added to the team is 210 cm.

6 0
3 years ago
Simplify the expression.<br> -5+i /2i
Andrei [34K]

Answer:

\frac{1+5i}{2}

Step-by-step explanation:

We know i×i=i^2 which has value of -1.

We will multiply numerator and denominator by i so the denominator will no longer contain imaginary part(s).

Also multiplying by i/i does not change the value of the fraction because i/i=1.

Numerator × i gives (-5+i)i=-5i+i^2=-5i-1

=-1-5i.

Denominator × i gives (2i)i=2i^2=-2.

So the simplified version of this fraction given is:

\frac{-1-5i}{-2}=\frac{1+5i}{2}

The last simplification come from me multiplying fraction by -1/-1.

6 0
3 years ago
The circumference of ruby's old swimming pool is 47.1 feet. Her new swimming pool has a diameter of 21 feet. How much larger is
Alla [95]

The new pool is 18.84 feet larger in circumference than the old one.

<u>Explanation:</u>

Given:

Circumference of the pool = 47.1 feet

Diameter of the new pool, d = 21 feet

radius, r = 21/2 feet

Circumference of the new pool = ?

We know:

Circumference = 2πr

where,

r is the radius

On substituting the value:

C = 2 X 3.14 X \frac{21}{2}

C = 65.94 feet

The difference in circumference of the two pools = 65.94 - 47.1 feet

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Therefore, the new pool is 18.84 feet larger in circumference than the old one.

6 0
3 years ago
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