Can someone please help??

Keeping the properties of exponents in mind, to what power must you raise the expression 7 1/2 to get 7 as a result

zhenek [66]

For this case we have the following expression:
$7 ^ {(1/2)}
$
Rewriting the expression we have:
$(7 ^ {(1/2)}) ^ x
$
Where,
x: exponent to which we must raise the expression to obtain 7 as a result.
We have then:
$7 ^ {((1/2) x)}
$
The exponent must be equal to 1:
$(1/2) x = 1
$
Clearing x we have:
$x = 2
$
Substituting valres:
$7 ^ {((1/2) 2)}

7 ^ 1

7$
Answer:
you must raise the expression to 2

7 0

3 years ago

Solve the system of linear equations by adding or subtracting. Show all work!

Thepotemich [5.8K]

Answer:

x = -2, y = -2

Step-by-step explanation:

Your goal is to try and cancel out a variable. I want to get rid of y so i subtracted the first equation from the second one.

After that I solve for x and got x=-2.

I used x=-2 and plugged it back into either of the equation to solve for y.

4 0

3 years ago

A survey was conducted to determine the average age at which college seniors hope to retire in a simple random sample of 101 sen

tatyana61 [14]

Answer:

96% confidence interval for desired retirement age of all college students is [54.30 , 55.70].

Step-by-step explanation:

We are given that a survey was conducted to determine the average age at which college seniors hope to retire in a simple random sample of 101 seniors, 55 was the average desired retirement age, with a standard deviation of 3.4 years.

Firstly, the Pivotal quantity for 96% confidence interval for the population mean is given by;

P.Q. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$