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Bumek [7]
3 years ago
13

Please help me find X.

Mathematics
1 answer:
maria [59]3 years ago
4 0
The correct answer is 54.3.
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Simplify the expression –3(x 3)2 – 3 3x. what is the simplified expression in standard form?
777dan777 [17]

-3(x^{2} +5x+10) is the standard form of the given expression

The given expression is:

=-3(x+3)^{2} -3+3x\\\\=-3*(x^{2} +2*3*x+3^{2} )-3+3x\\\\=-3x^{2} -3*6x-3*9-3+3x\\\\=-3x^{2} -18x-27-3+3x\\\\=-3x^{2} -15x-30\\\\=-3(x^{2} +5x+10)

This is the standard form of the given expression.

Learn more about Simplifying expression here brainly.com/question/723406

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7 0
2 years ago
Write a problem that can be solved by skip counting on a number line
BaLLatris [955]

Depending on where the counting starts, we can establish a set of odd numbers or even numbers.  If we start with odd numbers, skipping one every time gives a set of odd numbers, and so forth with even.

5 0
3 years ago
Weight gain during pregnancy. In 2004, the state of North Carolina released to the public a large data set containing informatio
Kryger [21]

Answer:

From the given data, there is not enough evidence to prove that there is a statistically significant difference between the two population means

Step-by-step explanation:

The number of younger moms, in the study = 837

The average weight gain of younger moms, \overline x₁ = 30.67 pounds

The standard deviation of the weight gain of younger moms, s₁ = 14.69 pounds

(30.67 - 28.52)/√((14.69^2)/837 + 13²/143))

The number of younger moms, in the study = 143

The average weight gain of mature moms, \overline x₂ = 28.52 pounds

The standard deviation of the weight gain of mature moms, s₂ = 13 pounds

The test statistic for the difference in two populations is given as follows;

t=\dfrac{(\bar{x}_{1}-\bar{x}_{2})}{\sqrt{\dfrac{s_1^{2} }{n_{1}}-\dfrac{s _{2}^{2}}{n_{2}}}}

Therefore, we get;

t=\dfrac{(30.67-28.52)}{\sqrt{\dfrac{14.69^{2} }{837}-\dfrac{13^{2}}{143}}} \approx 1.7919

The test statistic ≈ (1.7919)

Using a graphing calculator, we get;

The critical-t = ±1.971379, p = 0.07459697

Therefore, given that the test statistic, (1.7919), < critical-t (0.07459697), we fail to reject the null hypothesis, therefor, the given data does not provide convincing evidence that there is a significant difference between the two population means

7 0
3 years ago
A board game that normally costs $30 is on sale for 25 percent off. What is the sale price of the game?
Roman55 [17]
25% off translates into 0.25($30) = $7.50 off.

A faster way to determine the sales price is to subtract 0.25 from 1.00 and then mult. the regular price by the result:  sales price = 0.75($30) = $22.50 (answer)

5 0
3 years ago
Simplify: a^3 - 4a^2 - 5 - (2a^3 + 3)
Xelga [282]

Answer:= −4a^4−a^3−7

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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