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kvasek [131]
3 years ago
10

2.) Two students are working on a simplification problem. Their work is shown below. Is either of

Mathematics
1 answer:
kvasek [131]3 years ago
8 0

Answer:

Both Jeff and Lori are wrong.

Step-by-step explanation:

3 -  \frac{(4 \times 3)^{2} }{2}  + (1 \times 6)

3 - \frac{12^{2}}{2}  + 6

3 -  \frac{144}{2}  + 6

3 - 72 + 6

- 72 + 9

- 63

-63 is the final answer

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Can you Solve this plzzz nerd ur help<br><br>6÷2(1+2)=​
Mkey [24]

Answer:

9

Step-by-step explanation:

(do 1+2 first) then (6 divided by 2) then 3x3 and you will get 9

3 0
3 years ago
2x+3y=12 and y=x+1.5 in substitution form
Sonbull [250]

Answer:

(1.5, 3)

Step-by-step explanation:

Given the 2 equations

2x + 3y = 12 → (1)

y = x + 1.5 → (2)

Substitute y = x + 1. 5 into (1)

2x + 3(x + 1.5) = 12 ← distribute and simplify left side

2x + 3x + 4.5 = 12

5x + 4.5 = 12 ( subtract 4.5 from both sides )

5x = 7.5 ( divide both sides by 5 )

x = 1.5

Substitute x = 1.5 into (2) for corresponding value of y

y = 1.5 + 1.5 = 3

Solution is (1.5, 3)

4 0
3 years ago
A researcher at a school of nursing decides to investigate the correlation between a pre- admission HESI examination, high schoo
Nataly_w [17]

Answer: D. Predictive validity

Step-by-step explanation: Predictive validity can be explained as a method of determining the degree or level of correctness of a prediction using pre-existing information or data and values obtained from the actual measurement.

In the scenario above, the researchers investigates the correlation or relationship between the predicted value obtained using a pre- admission HESI examination, high school GPA, and SAT scores and the actual grade received upon completion of the first year. This process is to analyze or determine the validity of our prediction.

4 0
3 years ago
Evaluate this exponential expression.
Levart [38]

Answer:

(-27)^\dfrac{2}{3} = 9

Step-by-step explanation:

Given that,

Asn expression : (-27)^\dfrac{2}{3}

We need to evaluate the above expression.

We know that, (-3)^3=-27

So,

(-27)^\dfrac{2}{3}=(-3)^{3\times \dfrac{2}{3}}

or

=(-3)^2\\\\=-3\times -3\\\\=9

So, the value of (-27)^\dfrac{2}{3} is 9. Hence, the correct option is (b).

8 0
3 years ago
What is the following quotient?<br> 5 sqrt 11 - sq rt 3
liq [111]
The given rational function is

We need to rationalize the denominator by multiplying both the numerator and the denominator by the conjugate of

which is

When we rationalize we obtain:

The denominator is now a difference of two squares:

We apply this property to get


This simplifies to

Or

7 0
3 years ago
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