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padilas [110]
3 years ago
8

PLS HELP BRAINLIEST !!!Which of the following represents a perfect square trinomial?

Mathematics
2 answers:
yarga [219]3 years ago
7 0
A if not please answer back .
Hitman42 [59]3 years ago
4 0

Step-by-step explanation:

(A) is the right answer

............

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For the graph y = -8 find the slope of a line that is perpendicular to it and the slope of a line parallel to it. Explain your a
OLEGan [10]
Does it give you any more details?? if not it would be undefined for parallel and zero for perpendicular.<span />
8 0
4 years ago
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Evaluate the expression: 4(8 − 6)5 2 − 6 ÷ (−3).
mr Goodwill [35]

Answer:

86 or 32, depending on the correctness of the syntax

Step-by-step explanation:

We use PEMDAS:

Parentheses: 4(2)5 2-6/(-3)

Exponents: <em>I'm assuming that all the syntax is correct (so no exponents).</em>

Multiplication and Division: 40*2+6 = 80 + 6

Addition and Subtraction: 86

If you copy+pasted this expression, then the original equation would have been: (4(8 − 6)^5)/(2 − 6 ÷ (−3)). We can use PEMDAS:

Parentheses: (4(2)^5)/(2 - 6 ÷ (−3))

  • We solve the parentheses individually using PEMDAS:
  • Exponents: (4*32) <-- Numerator | Denominator -->(2 - 6 ÷ (−3))
  • Multiplication and Division: 128 <-- Numerator | Denominator --> 2 + 2
  • Addition and Subtraction: 128 < -- Numerator | Denominator --> 4

We now have the following fraction: 128/4

That simplifies to 32

7 0
3 years ago
The regular price of a basketball is $25.During a recent sale, it was marked down by $7. Use a proportion to find the percent di
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25-7=18
18/25=x/100
the scale factor is 4
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72%
8 0
3 years ago
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Suppose that a researcher is planning a new study on hemoglobin levels amongst women under 25 years old. Previous research sugge
Mariulka [41]

Answer:

A sample size of at least 531 is required.

Step-by-step explanation:

We are lacking the confidence level to solve this question, so i am going to use a 90% confidence level.

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

Find the required sample size for the new study.

A sample size of at least n is required.

n is found when M = 0.05

We have that \sigma = 0.7

So

M = z*\frac{\sigma}{\sqrt{n}}

0.05 = 1.645*\frac{0.7}{\sqrt{n}}

0.05\sqrt{n} = 1.645*0.7

\sqrt{n} = \frac{1.645*0.7}{0.05}

(\sqrt{n})^{2} = (\frac{1.645*0.7}{0.05})^{2}

n = 530.4

Rounding up

A sample size of at least 531 is required.

5 0
3 years ago
Solve the inequality and show ur work please <br>- 5x + 2) &gt;5<br>​
lakkis [162]

Answer:

<h2>x <  -  \frac{3}{5}</h2>

Step-by-step explanation:

| - 5x + 2|  > 5 \\  - 5x > 5 - 2 \\  - 5x > 3 \\ x <  -  \frac{3}{5}

<h3>Hope it is helpful....</h3>
8 0
3 years ago
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