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3 years ago

14

Simplify (6 + 5x) + (7x + 3)

1 answer:

sashaice [31]3 years ago

8 0

Combine Like Terms:<span>

=<span><span><span>6+<span>5x</span></span>+<span>7x</span></span>+3</span></span><span>

=<span><span>(<span><span>5x</span>+<span>7x</span></span>)</span>+<span>(<span>6+3</span>)</span></span></span><span>

=<span><span>12x</span>+<span>9

</span></span></span>

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Select all of the following that are quadratic equations.

kifflom [539]

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4 years ago

Solve for m: (y_1 - y_2) = m(x_1 - x_2)

Mashutka [201]

$y_1-y_2=m(x_1-x_2)\\
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4 years ago

An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an est

amid [387]

Answer:

(38.1,88.6)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = 38.3

Sample size, n = 695

Alpha, α = 0.05

Population standard deviation, σ = 3.6

95% Confidence interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$38.3 \pm 1.96(\frac{3.6}{\sqrt{695}} ) = 38.3 \pm 0.267 = (38.033,38.567) \approx (38.1,88.6)$

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3 years ago

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Vanyuwa [196]

Answer:

CD =3m

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AB=BD

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3 years ago

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VashaNatasha [74]

Answer:

The correct relation between Vocabulary terms and definitions is as follow:

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b. observational study → a study in which data is collected without anything being done to the subjects.

c. retrospective study → d. a study in which data from the past is examine

d. experimental units → c. The people, animals or things on whom experiments are performed

e. experiment → e. a study in which a treatment is applied and responses are observed

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3 years ago