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4 years ago

3a+4+b+2a+5+b Simplify the expression?

Mathematics

1 answer:

MissTica4 years ago

7 0

Answer:

$5a+2b+9$

Step-by-step explanation:

Given expression:

$3a+4+b+2a+5+b$

In order to simplify the given expression, we will first group the like terms.

$3a+2a+b+b+4+5$

Then we combine the like terms,

$3a+2a=5a\\b+b=2b\\5+4=9$

The terms combined can be written as:

$5a+2b+9$ (Answer)

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How many solutions does the system have?

Mrac [35]

Answer:

A Exactly one solution

Step-by-step explanation:

$\left \{ {{6x-3y=9} \atop {6x+y=9}} \right.\\\\\left \{ {{6x-3y=9} \atop {-6x-y=-9}} \right\\\\Then, \\\\-4y=0\\\\\\ y=0\\\\$

Putting y=0 at second equation, we have

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3 years ago

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Answer:

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3 years ago

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1368.25 minus 497.80= 870.45

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3 years ago

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According to the National Association of Realtors, it took an average of three weeks to sell a home in 2017. Suppose data for th

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Solution :

Here, given :

Sample size, n = 39

Sample mean, $\bar X$ = 3.6

Standard deviation of the sample, s =2

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The significance level, $\alpha = 0.05$

a). Therefore the hypothesis is :

$H_0 : \mu = 3 \text{ Vs} \ H_a: \mu \neq 3$

b). The test statics is given as :

$t = \frac{\bar X - \mu_0}{\frac{s}{\sqrt n}} \rightarrow t_{n-1}$

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= 1.873

c). The p- value is given by :

$P(t_{d.f}>|t_{stat}|)$

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d). The conclusion :

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3 years ago

Find all real and imaginary solutions to the equation; x^3-2x^2+x-2=0

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The answer would letter A

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