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posledela
3 years ago
5

Solve h=-b/2a for b this is a algebra question

Mathematics
2 answers:
Harman [31]3 years ago
8 0
\sf Solve \ for \ b. \\  \\ h =  \frac{-b}{2} a  \\  \\ Flip \ equation \\  \\  \frac{-1}{2} ab = h  \\  \\ Divide\ both \ sides\ by  \frac{(-a)}{2}  \\  \\  \frac{1}{2}ab/ \frac{-a}{2} =  h / -a / 2 \\  \\ b =  \frac{-2h}{a}
zysi [14]3 years ago
5 0
h=-\frac{b}{2a}\\\\\frac{b}{2a}=-h\ \ \ \ |multiply\ both\ sides\ by\ 2a\neq0\\\\\huge\boxed{b=-2ah}
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Jean adds 35 and 9. How can she solve using only equations to model her thinking?
LenKa [72]
She can mostly add 35 and 9 and it will give you 44
3 0
3 years ago
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18) The degree of P(x) = (x-1)(x+2)(x+3)(2x-5) is<br><br><br>4<br>3<br>2<br>1​
Fantom [35]

Answer:

degree 4

Step-by-step explanation:

The degree of a polynomial is determined by the term with the largest exponent for the polynomial in standard form

Given

P(x) = (x - 1)(x + 2)(x + 3)(2x - 5)

We need only consider the product of the leading terms in each factor, that is

x(x)(x)(2x) = 2x^{4} ← is the leading term in the expansion of the factors

with exponent 4

Thus polynomial is of degree 4

3 0
2 years ago
How do you solve this?<br><br> -5√112
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Simplify the radicand by breaking the radicand up into a product of known factors. 

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3 0
3 years ago
According to the University of Nevada Center for Logistics Management, 6% of all mer-
Fudgin [204]

Answer:

a) The point estimate of the proportion of items returned for the population of

sales transactions at the Houston store = 12/80 = 0.15

b) The 95% confidence interval for the proportion of returns at the Houston store = [0.0718 < p < 0.2282].

c) Yes.

We set an hypothesis and construct a test statistics. The test statistics result gives us:

Z calculated  = 2.2545, and this gives us the p-value = 0.0121. We assumed 95% confident interval. Hence, the level of significance (α) = 5%. Conclusively, since the p-value ==> 0.0121 is less than (α) = 5%, the test is significant. Hence, the proportion of returns at the Houston store is significantly different from the returns  for the nation as a whole.

Step-by-step explanation:

a) Point estimate of the proportion = number of returned items/ total items sold = 12/80 = 0.15.

b) By formula of confident interval:

CI(95%) = p ± Z*\sqrt{\frac{p*(1-p)}{n} }  =  0.15 \pm 1.96 *\sqrt{\frac{0.15*(1-0.15)}{80} },

CI(95%) = [0.0718 < p < 0.2282]

c) The hypothesis:

H_{0}: The proportion of returns at the Houston store is not significantly different from the returns  for the nation as a whole.

H_{a}: The proportion of returns at the Houston store is significantly different from the returns  for the nation as a whole.

The test statistics:

Z = \frac{\hat{p} - p_{0}}{\sqrt{\frac{p*(1-p)}{n} }}, where p_{0} is the proportion of nation returns.

Z calculated  = 2.2545, and this gives us the p-value = 0.0121. We assumed 95% confident interval. Hence, the level of significance (α) = 5%. Conclusively, since the p-value ==> 0.0121 is less than (α) = 5%, the test is significant. Hence, the proportion of returns at the Houston store is significantly different from the returns  for the nation as a whole.

6 0
3 years ago
The length of a rectangular prism is 1.5 feet. Its width is 7 feet and its height is 6.2 feet. So the volume of the prism is 65.
Alexxandr [17]

7 * 6.2 * 1.5 = 65.1

the answer is True

5 0
3 years ago
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