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irakobra [83]
3 years ago
14

Exponents: Can me help me? This is the one, I just can't get.

Mathematics
1 answer:
aliina [53]3 years ago
4 0

Answer:

1

Step-by-step explanation:

x^y * x^-y

When the bases are the same,   we add the exponents when multiplying

x^(y-y)

x^0

Anything to the zero power is 1  (except 0)

1


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Adrian help me. Tgdhd
11111nata11111 [884]

Answer:

help with what?

Step-by-step explanation:

7 0
3 years ago
10x+y when x = 7 and y = 5
kherson [118]

Answer: 75

Step-by-step explanation:

Plug in 7 for x and 5 for y

10(7)+5

70+5

75

3 0
3 years ago
A department store wants to know what fraction of its customers in a certain market have store credit cards, and what their aver
bearhunter [10]

Answer:

The 98% confidence interval for the average credit card balance is

(564.04, 635.96).

Step-by-step explanation:

We have to calculate the 98% confidence interval on the average credit card balance.

The sample will consist of the n=30 customers that have credit card.

The sample has a mean of $600 and a standard deviation of $80.

As the population standard deviation is estimated from the sample standard deviation, we will use a t statistic.

The degrees of freedom are:

df=n-1=30-1=29

The critical value for a 98% CI and 29 degrees of freedom is t=2.463 (this can be looked up in a t-table).

Then, the margin of error is:

E=t\cdot s/\sqrt{n}=2.463*80/\sqrt{30}=197.04/5.48=35.96

Then, the upper and lower bounds of the confidence interval are:

LL=\bar X-E=600-35.96=564.04\\\\UL=\bar X+E=600+35.96=635.96

4 0
3 years ago
The volume of a sphere is 81 cubic centimeters. Which equation can be used to solve for the radius of the sphere?
sashaice [31]

Answer:

81π=4/3πr^3. Hope this helps

5 0
3 years ago
Write an equation in slope-intercept form for the line that passes through the given point and is parallel to the graph of the g
dangina [55]

Answer:

y = 3x + 1

Step-by-step explanation:

First, turn 3x - y = 4 around into Slope-Intercept Form:

3x - y = 4

-3x - 3x

________

−y = −3x + 4

y = 3x - 4

The <em>rate</em><em> </em><em>of</em><em> </em><em>change</em><em> </em>[<em>slope</em>] is 3:

−2 = 3[−1] + b

−3

1 = b

y = 3x + 1

* Parallel lines have SIMILAR <em>RATE OF CHANGES</em> [<em>SLOPES</em>], so 3 remains the way it is.

I am joyous to assist you anytime.

3 0
4 years ago
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