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3 years ago

Write an algebraic expression to represent the overall phrase. Explain why you have to use some sort of grouping symbol.

1 answer:

4 0

It would be infinitely easier to do that if you had shared the contents of the phrase.
As it is, your question is a lot like asking "How far is it from here ?"

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5 points for the whole problem (Sorry it's all I have left)

Strike441 [17]

Answer: i don't see the problem

Step-by-step explanation:

3 0

2 years ago

Which expression is equivalent to 5y^3/(5y)^-2

Serggg [28]

Answer:

5^3 y^5

125 y^5

Step-by-step explanation:

5y^3/(5y)^-2

Distribute the exponent in the denominator

5y^3/(5 ^-2 y^-2)

A negative exponent in the denominator brings it to the numerator

5y^3 5 ^2 y^2

Combine like terms

5 * 5^2 * y^3 5^2

We know that a^b * a^c = a^(b+c)

5^(1+2) * y^( 3+2)

5^3 y^5

125 y^5

6 0

2 years ago

A drug company is testing a new drag which is supported to reduce blood pressure. From the nine people who are used as subjects,

Pie

Answer:

The 95% confidence interval for the mean change in blood pressure, $\bar{x}$ , is 1.744 < $\bar{x}$ < 2.816

Step-by-step explanation:

The parameters given are;

The number of people in the sample, n = 9

The average drop in blood pressure, $\bar{x}$ = 2.28 points

The standard deviation, σ = 0.82

The confidence level = 95%

The formula for confidence interval with a known mean is given as follows;

$CI=\bar{x}\pm z_{\alpha/2} \dfrac{\sigma}{\sqrt{n}}$

Where:

$z_{\alpha/2}$ = z - score at 95% confidence level = 1.96

We therefore have;

$CI=2.28 \pm 1.96 \times \dfrac{0.82}{\sqrt{9}}$

Which gives the 95% confidence interval for the mean change in pressure, $\bar{x}$ , is given as follows;

1.744 < $\bar{x}$ < 2.816

6 0

2 years ago

Mrs. Scott opened an account with a deposit of $1,750. The bank pays 5% annual simple interest on this account. Mrs. Scott makes

Korolek [52]

Answer:

At the end of two years Mrs.Scott earned $1929.36 (i rounded the dec.)

Step-by-step explanation:

A= p(1+r)^t

P= 1750

r= .05

t= 2

A= 1750(1+.05)^2

A= 1929.375

3 0

2 years ago

I WILL GIVE BRAINLIEST! PLEASE TAKE YOUR TIME!

likoan [24]

Answer:

-27.6

Step-by-step explanation:

I'm smart but probably shouldn't use my answer

8 0

2 years ago